diff --git a/src/apis/avm/api.ts b/src/apis/avm/api.ts
index 6ba2e27bf..81d3ecd7c 100644
--- a/src/apis/avm/api.ts
+++ b/src/apis/avm/api.ts
@@ -1017,7 +1017,8 @@ export class AVMAPI extends JRPCAPI {
    * @param memo Optional CB58 Buffer or String which contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction ([[UnsignedTx]]) which contains a [[BaseTx]].
    *
@@ -1034,7 +1035,8 @@ export class AVMAPI extends JRPCAPI {
     memo: PayloadBase | Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const caller: string = "buildBaseTx"
     const to: Buffer[] = this._cleanAddressArray(toAddresses, caller).map(
@@ -1073,7 +1075,8 @@ export class AVMAPI extends JRPCAPI {
       memo,
       asOf,
       locktime,
-      threshold
+      toThreshold,
+      changeThreshold
     )
 
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
@@ -1098,7 +1101,8 @@ export class AVMAPI extends JRPCAPI {
    * @param memo Optional CB58 Buffer or String which contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction ([[UnsignedTx]]) which contains a [[NFTTransferTx]].
    *
@@ -1114,7 +1118,8 @@ export class AVMAPI extends JRPCAPI {
     memo: PayloadBase | Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const caller: string = "buildNFTTransferTx"
     const to: Buffer[] = this._cleanAddressArray(toAddresses, caller).map(
@@ -1152,7 +1157,8 @@ export class AVMAPI extends JRPCAPI {
       memo,
       asOf,
       locktime,
-      threshold
+      toThreshold,
+      changeThreshold
     )
 
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
@@ -1178,7 +1184,8 @@ export class AVMAPI extends JRPCAPI {
    * @param memo Optional CB58 Buffer or String which contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction ([[UnsignedTx]]) which contains a [[ImportTx]].
    *
@@ -1195,7 +1202,8 @@ export class AVMAPI extends JRPCAPI {
     memo: PayloadBase | Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const caller: string = "buildImportTx"
     const to: Buffer[] = this._cleanAddressArray(toAddresses, caller).map(
@@ -1257,7 +1265,8 @@ export class AVMAPI extends JRPCAPI {
       memo,
       asOf,
       locktime,
-      threshold
+      toThreshold,
+      changeThreshold
     )
 
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
@@ -1283,7 +1292,8 @@ export class AVMAPI extends JRPCAPI {
    * @param memo Optional CB58 Buffer or String which contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    * @param assetID Optional. The assetID of the asset to send. Defaults to AVAX assetID.
    * Regardless of the asset which you"re exporting, all fees are paid in AVAX.
    *
@@ -1299,7 +1309,8 @@ export class AVMAPI extends JRPCAPI {
     memo: PayloadBase | Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1,
+    toThreshold: number = 1,
+    changeThreshold: number = 1,
     assetID: string = undefined
   ): Promise<UnsignedTx> => {
     const prefixes: object = {}
@@ -1372,7 +1383,8 @@ export class AVMAPI extends JRPCAPI {
       memo,
       asOf,
       locktime,
-      threshold
+      toThreshold,
+      changeThreshold
     )
 
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
@@ -1399,6 +1411,7 @@ export class AVMAPI extends JRPCAPI {
    * @param mintOutputs Optional. Array of [[SECPMintOutput]]s to be included in the transaction. These outputs can be spent to mint more tokens.
    * @param memo Optional CB58 Buffer or String which contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction ([[UnsignedTx]]) which contains a [[CreateAssetTx]].
    *
@@ -1413,7 +1426,8 @@ export class AVMAPI extends JRPCAPI {
     denomination: number,
     mintOutputs: SECPMintOutput[] = undefined,
     memo: PayloadBase | Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const caller: string = "buildCreateAssetTx"
     const from: Buffer[] = this._cleanAddressArray(fromAddresses, caller).map(
@@ -1458,7 +1472,8 @@ export class AVMAPI extends JRPCAPI {
       fee,
       avaxAssetID,
       memo,
-      asOf
+      asOf,
+      changeThreshold
     )
 
     if (!(await this.checkGooseEgg(builtUnsignedTx, fee))) {
@@ -1471,6 +1486,22 @@ export class AVMAPI extends JRPCAPI {
     return builtUnsignedTx
   }
 
+  /**
+   * Creates an unsigned Secp mint transaction. For more granular control, you may create your own
+   * [[OperationTx]] manually (with their corresponding [[TransferableInput]]s, [[TransferableOutput]]s, and [[TransferOperation]]s).
+   *
+   * @param utxoset A set of UTXOs that the transaction is built on
+   * @param mintOwner A [[SECPMintOutput]] which specifies the new set of minters
+   * @param transferOwner A [[SECPTransferOutput]] which specifies where the minted tokens will go
+   * @param fromAddresses The addresses being used to send the funds from the UTXOs {@link https://github.com/feross/buffer|Buffer}
+   * @param changeAddresses The addresses that can spend the change remaining from the spent UTXOs
+   * @param mintUTXOID The UTXOID for the [[SCPMintOutput]] being spent to produce more tokens
+   * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
+   * @returns An unsigned transaction ([[UnsignedTx]]) which contains a [[SECPMintTx]].
+   */
   buildSECPMintTx = async (
     utxoset: UTXOSet,
     mintOwner: SECPMintOutput,
@@ -1479,7 +1510,8 @@ export class AVMAPI extends JRPCAPI {
     changeAddresses: string[],
     mintUTXOID: string,
     memo: PayloadBase | Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    changeThreshold: number = 1
   ): Promise<any> => {
     const caller: string = "buildSECPMintTx"
     const from: Buffer[] = this._cleanAddressArray(fromAddresses, caller).map(
@@ -1509,7 +1541,8 @@ export class AVMAPI extends JRPCAPI {
       fee,
       avaxAssetID,
       memo,
-      asOf
+      asOf,
+      changeThreshold
     )
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
       /* istanbul ignore next */
@@ -1533,6 +1566,7 @@ export class AVMAPI extends JRPCAPI {
    * @param memo Optional CB58 Buffer or String which contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting mint output
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * ```js
    * Example minterSets:
@@ -1635,6 +1669,7 @@ export class AVMAPI extends JRPCAPI {
    * @param payload Optional. Data for NFT Payload as either a [[PayloadBase]] or a {@link https://github.com/feross/buffer|Buffer}
    * @param memo Optional CB58 Buffer or String which contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction ([[UnsignedTx]]) which contains an [[OperationTx]].
    *
diff --git a/src/apis/avm/utxos.ts b/src/apis/avm/utxos.ts
index 57463e7f0..55f79c7e0 100644
--- a/src/apis/avm/utxos.ts
+++ b/src/apis/avm/utxos.ts
@@ -343,7 +343,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional. Contains arbitrary data, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    *
@@ -361,9 +362,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
-    if (threshold > toAddresses.length) {
+    if (toThreshold > toAddresses.length) {
       /* istanbul ignore next */
       throw new ThresholdError(
         "Error - UTXOSet.buildBaseTx: threshold is greater than number of addresses"
@@ -386,8 +388,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     const aad: AssetAmountDestination = new AssetAmountDestination(
       toAddresses,
+      toThreshold,
       fromAddresses,
-      changeAddresses
+      changeAddresses,
+      changeThreshold
     )
     if (assetID.toString("hex") === feeAssetID.toString("hex")) {
       aad.addAssetAmount(assetID, amount, fee)
@@ -401,12 +405,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     let ins: TransferableInput[] = []
     let outs: TransferableOutput[] = []
 
-    const success: Error = this.getMinimumSpendable(
-      aad,
-      asOf,
-      locktime,
-      threshold
-    )
+    const success: Error = this.getMinimumSpendable(aad, asOf, locktime)
     if (typeof success === "undefined") {
       ins = aad.getInputs()
       outs = aad.getAllOutputs()
@@ -435,6 +434,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param feeAssetID Optional. The assetID of the fees being burned.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    *
@@ -452,7 +452,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     fee: BN = undefined,
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -460,9 +461,11 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, fee)
       const success: Error = this.getMinimumSpendable(aad, asOf)
@@ -514,6 +517,9 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param feeAssetID Optional. The assetID of the fees being burned.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
+   * @returns An unsigned transaction created from the passed in parameters.
    */
   buildSECPMintTx = (
     networkID: number,
@@ -526,7 +532,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     fee: BN = undefined,
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -534,9 +541,11 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, fee)
       const success: Error = this.getMinimumSpendable(aad, asOf)
@@ -608,6 +617,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting mint output
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    *
@@ -624,7 +634,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
-    locktime: BN = undefined
+    locktime: BN = undefined,
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -632,9 +643,11 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, fee)
       const success: Error = this.getMinimumSpendable(aad, asOf)
@@ -686,6 +699,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param feeAssetID Optional. The assetID of the fees being burned.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    *
@@ -702,7 +716,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     fee: BN = undefined,
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -710,9 +725,11 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, fee)
       const success: Error = this.getMinimumSpendable(aad, asOf)
@@ -779,7 +796,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    *
@@ -796,7 +814,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -804,9 +823,11 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, fee)
       const success: Error = this.getMinimumSpendable(aad, asOf)
@@ -829,7 +850,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
         out.getPayload(),
         toAddresses,
         locktime,
-        threshold
+        toThreshold
       )
       const op: NFTTransferOperation = new NFTTransferOperation(outbound)
 
@@ -878,7 +899,9 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
    * @returns An unsigned transaction created from the passed in parameters.
    *
    */
@@ -895,7 +918,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -961,7 +985,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
           infeeamount,
           toAddresses,
           locktime,
-          threshold
+          toThreshold
         ) as AmountOutput
         const xferout: TransferableOutput = new TransferableOutput(
           assetID,
@@ -976,16 +1000,13 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     if (feeRemaining.gt(zero) && this._feeCheck(feeRemaining, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
         toAddresses,
+        toThreshold,
         fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, feeRemaining)
-      const success: Error = this.getMinimumSpendable(
-        aad,
-        asOf,
-        locktime,
-        threshold
-      )
+      const success: Error = this.getMinimumSpendable(aad, asOf, locktime)
       if (typeof success === "undefined") {
         ins = aad.getInputs()
         outs = aad.getAllOutputs()
@@ -1022,7 +1043,9 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
    * @returns An unsigned transaction created from the passed in parameters.
    *
    */
@@ -1040,7 +1063,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
     let ins: TransferableInput[] = []
     let outs: TransferableOutput[] = []
@@ -1066,8 +1090,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     const aad: AssetAmountDestination = new AssetAmountDestination(
       toAddresses,
+      toThreshold,
       fromAddresses,
-      changeAddresses
+      changeAddresses,
+      changeThreshold
     )
     if (assetID.toString("hex") === feeAssetID.toString("hex")) {
       aad.addAssetAmount(assetID, amount, fee)
@@ -1077,12 +1103,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
         aad.addAssetAmount(feeAssetID, zero, fee)
       }
     }
-    const success: Error = this.getMinimumSpendable(
-      aad,
-      asOf,
-      locktime,
-      threshold
-    )
+    const success: Error = this.getMinimumSpendable(aad, asOf, locktime)
     if (typeof success === "undefined") {
       ins = aad.getInputs()
       outs = aad.getChangeOutputs()
diff --git a/src/apis/evm/utxos.ts b/src/apis/evm/utxos.ts
index 1662b7a52..6c90c72fc 100644
--- a/src/apis/evm/utxos.ts
+++ b/src/apis/evm/utxos.ts
@@ -436,7 +436,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param feeAssetID Optional. The assetID of the fees being burned.
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changethreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    * @returns An unsigned transaction created from the passed in parameters.
    *
    */
@@ -453,7 +454,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     feeAssetID: Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
     let ins: EVMInput[] = []
     let exportouts: TransferableOutput[] = []
@@ -483,8 +485,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     const aad: AssetAmountDestination = new AssetAmountDestination(
       toAddresses,
+      toThreshold,
       fromAddresses,
-      changeAddresses
+      changeAddresses,
+      changeThreshold
     )
     if (avaxAssetID.toString("hex") === feeAssetID.toString("hex")) {
       aad.addAssetAmount(avaxAssetID, amount, fee)
@@ -494,12 +498,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
         aad.addAssetAmount(feeAssetID, zero, fee)
       }
     }
-    const success: Error = this.getMinimumSpendable(
-      aad,
-      asOf,
-      locktime,
-      threshold
-    )
+    const success: Error = this.getMinimumSpendable(aad, asOf, locktime)
     if (typeof success === "undefined") {
       exportouts = aad.getOutputs()
     } else {
diff --git a/src/apis/platformvm/api.ts b/src/apis/platformvm/api.ts
index 4daadde2a..174276868 100644
--- a/src/apis/platformvm/api.ts
+++ b/src/apis/platformvm/api.ts
@@ -7,7 +7,7 @@ import BN from "bn.js"
 import AvalancheCore from "../../camino"
 import { JRPCAPI } from "../../common/jrpcapi"
 import { RequestResponseData } from "../../common/apibase"
-import { ErrorResponseObject } from "../../utils/errors"
+import { ErrorResponseObject, UTXOError } from "../../utils/errors"
 import BinTools from "../../utils/bintools"
 import { KeyChain } from "./keychain"
 import { ONEAVAX } from "../../utils/constants"
@@ -57,13 +57,15 @@ import {
   GetMinStakeResponse,
   GetMaxStakeAmountParams,
   SpendParams,
-  SpendReply
+  SpendReply,
+  OutputOwner
 } from "./interfaces"
 import { TransferableInput } from "./inputs"
 import { TransferableOutput } from "./outputs"
 import { Serialization, SerializedType } from "../../utils"
 import { GenesisData } from "../avm"
 import { CaminoExecutor } from "./camino_executor"
+import { Network } from "../../utils/networks"
 
 /**
  * @ignore
@@ -110,6 +112,15 @@ export class PlatformVMAPI extends JRPCAPI {
     return this.core.getNetwork().P.alias
   }
 
+  /**
+   * Gets the current network, fetched via avalanche.fetchNetworkSettings.
+   *
+   * @returns The current Network
+   */
+  getNetwork = (): Network => {
+    return this.core.getNetwork()
+  }
+
   /**
    * Gets the blockchainID and returns it.
    *
@@ -1259,7 +1270,8 @@ export class PlatformVMAPI extends JRPCAPI {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction ([[UnsignedTx]]) which contains a [[ImportTx]].
    *
@@ -1276,7 +1288,8 @@ export class PlatformVMAPI extends JRPCAPI {
     memo: PayloadBase | Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const to: Buffer[] = this._cleanAddressArray(
       toAddresses,
@@ -1317,21 +1330,43 @@ export class PlatformVMAPI extends JRPCAPI {
 
     const atomics: UTXO[] = atomicUTXOs.getAllUTXOs()
 
-    const builtUnsignedTx: UnsignedTx = utxoset.buildImportTx(
-      this.core.getNetworkID(),
-      bintools.cb58Decode(this.blockchainID),
-      to,
-      from,
-      change,
-      atomics,
-      sourceChain,
-      this.getTxFee(),
-      avaxAssetID,
-      memo,
-      asOf,
-      locktime,
-      threshold
-    )
+    var builtUnsignedTx: UnsignedTx
+    if (this.core.getNetwork().P.lockModeBondDeposit) {
+      const executor = new CaminoExecutor(this)
+
+      builtUnsignedTx = await executor.buildImportTx(
+        this.core.getNetworkID(),
+        bintools.cb58Decode(this.blockchainID),
+        to,
+        from,
+        change,
+        atomics,
+        sourceChain,
+        this.getTxFee(),
+        avaxAssetID,
+        memo,
+        locktime,
+        toThreshold,
+        changeThreshold
+      )
+    } else {
+      builtUnsignedTx = utxoset.buildImportTx(
+        this.core.getNetworkID(),
+        bintools.cb58Decode(this.blockchainID),
+        to,
+        from,
+        change,
+        atomics,
+        sourceChain,
+        this.getTxFee(),
+        avaxAssetID,
+        memo,
+        asOf,
+        locktime,
+        toThreshold,
+        changeThreshold
+      )
+    }
 
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
       /* istanbul ignore next */
@@ -1354,7 +1389,8 @@ export class PlatformVMAPI extends JRPCAPI {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction ([[UnsignedTx]]) which contains an [[ExportTx]].
    */
@@ -1368,7 +1404,8 @@ export class PlatformVMAPI extends JRPCAPI {
     memo: PayloadBase | Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     let prefixes: object = {}
     toAddresses.map((a: string): void => {
@@ -1417,22 +1454,45 @@ export class PlatformVMAPI extends JRPCAPI {
 
     const avaxAssetID: Buffer = await this.getAVAXAssetID()
 
-    const builtUnsignedTx: UnsignedTx = utxoset.buildExportTx(
-      this.core.getNetworkID(),
-      bintools.cb58Decode(this.blockchainID),
-      amount,
-      avaxAssetID,
-      to,
-      from,
-      change,
-      destinationChain,
-      this.getTxFee(),
-      avaxAssetID,
-      memo,
-      asOf,
-      locktime,
-      threshold
-    )
+    var builtUnsignedTx: UnsignedTx
+    if (this.core.getNetwork().P.lockModeBondDeposit) {
+      const executor = new CaminoExecutor(this)
+
+      builtUnsignedTx = await executor.buildExportTx(
+        this.core.getNetworkID(),
+        bintools.cb58Decode(this.blockchainID),
+        amount,
+        avaxAssetID,
+        to,
+        from,
+        change,
+        destinationChain,
+        this.getTxFee(),
+        avaxAssetID,
+        memo,
+        locktime,
+        toThreshold,
+        changeThreshold
+      )
+    } else {
+      builtUnsignedTx = utxoset.buildExportTx(
+        this.core.getNetworkID(),
+        bintools.cb58Decode(this.blockchainID),
+        amount,
+        avaxAssetID,
+        to,
+        from,
+        change,
+        destinationChain,
+        this.getTxFee(),
+        avaxAssetID,
+        memo,
+        asOf,
+        locktime,
+        toThreshold,
+        changeThreshold
+      )
+    }
 
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
       /* istanbul ignore next */
@@ -1456,6 +1516,7 @@ export class PlatformVMAPI extends JRPCAPI {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param subnetAuthCredentials Optional. An array of index and address to sign for each SubnetAuth.
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
@@ -1471,7 +1532,8 @@ export class PlatformVMAPI extends JRPCAPI {
     subnetID: string,
     memo: PayloadBase | Buffer = undefined,
     asOf: BN = UnixNow(),
-    subnetAuthCredentials: [number, Buffer][] = []
+    subnetAuthCredentials: [number, Buffer][] = [],
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const from: Buffer[] = this._cleanAddressArray(
       fromAddresses,
@@ -1495,22 +1557,45 @@ export class PlatformVMAPI extends JRPCAPI {
       )
     }
 
-    const builtUnsignedTx: UnsignedTx = utxoset.buildAddSubnetValidatorTx(
-      this.core.getNetworkID(),
-      bintools.cb58Decode(this.blockchainID),
-      from,
-      change,
-      NodeIDStringToBuffer(nodeID),
-      startTime,
-      endTime,
-      weight,
-      subnetID,
-      this.getDefaultTxFee(),
-      avaxAssetID,
-      memo,
-      asOf,
-      subnetAuthCredentials
-    )
+    var builtUnsignedTx: UnsignedTx
+    if (this.core.getNetwork().P.lockModeBondDeposit) {
+      const executor = new CaminoExecutor(this)
+
+      builtUnsignedTx = await executor.buildAddSubnetValidatorTx(
+        this.core.getNetworkID(),
+        bintools.cb58Decode(this.blockchainID),
+        from,
+        change,
+        NodeIDStringToBuffer(nodeID),
+        startTime,
+        endTime,
+        weight,
+        subnetID,
+        this.getDefaultTxFee(),
+        avaxAssetID,
+        memo,
+        subnetAuthCredentials,
+        changeThreshold
+      )
+    } else {
+      builtUnsignedTx = utxoset.buildAddSubnetValidatorTx(
+        this.core.getNetworkID(),
+        bintools.cb58Decode(this.blockchainID),
+        from,
+        change,
+        NodeIDStringToBuffer(nodeID),
+        startTime,
+        endTime,
+        weight,
+        subnetID,
+        this.getDefaultTxFee(),
+        avaxAssetID,
+        memo,
+        asOf,
+        subnetAuthCredentials,
+        changeThreshold
+      )
+    }
 
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
       /* istanbul ignore next */
@@ -1537,6 +1622,8 @@ export class PlatformVMAPI extends JRPCAPI {
    * @param rewardThreshold Opional. The number of signatures required to spend the funds in the resultant reward UTXO. Default 1.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
@@ -1553,7 +1640,9 @@ export class PlatformVMAPI extends JRPCAPI {
     rewardLocktime: BN = new BN(0),
     rewardThreshold: number = 1,
     memo: PayloadBase | Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const to: Buffer[] = this._cleanAddressArray(
       toAddresses,
@@ -1593,6 +1682,12 @@ export class PlatformVMAPI extends JRPCAPI {
       )
     }
 
+    if (this.core.getNetwork().P.lockModeBondDeposit) {
+      throw new UTXOError(
+        "PlatformVMAPI.buildAddDelegatorTx -- not supported in lockmodeBondDeposit"
+      )
+    }
+
     const builtUnsignedTx: UnsignedTx = utxoset.buildAddDelegatorTx(
       this.core.getNetworkID(),
       bintools.cb58Decode(this.blockchainID),
@@ -1610,7 +1705,9 @@ export class PlatformVMAPI extends JRPCAPI {
       new BN(0),
       avaxAssetID,
       memo,
-      asOf
+      asOf,
+      toThreshold,
+      changeThreshold
     )
 
     if (!(await this.checkGooseEgg(builtUnsignedTx))) {
@@ -1639,6 +1736,8 @@ export class PlatformVMAPI extends JRPCAPI {
    * @param rewardThreshold Opional. The number of signatures required to spend the funds in the resultant reward UTXO. Default 1.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
@@ -1656,7 +1755,9 @@ export class PlatformVMAPI extends JRPCAPI {
     rewardLocktime: BN = new BN(0),
     rewardThreshold: number = 1,
     memo: PayloadBase | Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const to: Buffer[] = this._cleanAddressArray(
       toAddresses,
@@ -1705,8 +1806,8 @@ export class PlatformVMAPI extends JRPCAPI {
         "PlatformVMAPI.buildAddValidatorTx -- startTime must be in the future and endTime must come after startTime"
       )
     }
-    var builtUnsignedTx: UnsignedTx
 
+    var builtUnsignedTx: UnsignedTx
     if (this.core.getNetwork().P.lockModeBondDeposit) {
       const executor = new CaminoExecutor(this)
 
@@ -1724,7 +1825,9 @@ export class PlatformVMAPI extends JRPCAPI {
         rewardLocktime,
         rewardThreshold,
         memo,
-        avaxAssetID
+        avaxAssetID,
+        toThreshold,
+        changeThreshold
       )
     } else {
       builtUnsignedTx = utxoset.buildAddValidatorTx(
@@ -1745,7 +1848,9 @@ export class PlatformVMAPI extends JRPCAPI {
         new BN(0),
         avaxAssetID,
         memo,
-        asOf
+        asOf,
+        toThreshold,
+        changeThreshold
       )
     }
 
@@ -1767,6 +1872,7 @@ export class PlatformVMAPI extends JRPCAPI {
    * @param subnetOwnerThreshold A number indicating the amount of signatures required to add validators to a subnet
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
@@ -1777,7 +1883,8 @@ export class PlatformVMAPI extends JRPCAPI {
     subnetOwnerAddresses: string[],
     subnetOwnerThreshold: number,
     memo: PayloadBase | Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const from: Buffer[] = this._cleanAddressArray(
       fromAddresses,
@@ -1800,18 +1907,38 @@ export class PlatformVMAPI extends JRPCAPI {
     const networkID: number = this.core.getNetworkID()
     const blockchainID: Buffer = bintools.cb58Decode(this.blockchainID)
     const fee: BN = this.getCreateSubnetTxFee()
-    const builtUnsignedTx: UnsignedTx = utxoset.buildCreateSubnetTx(
-      networkID,
-      blockchainID,
-      from,
-      change,
-      owners,
-      subnetOwnerThreshold,
-      fee,
-      avaxAssetID,
-      memo,
-      asOf
-    )
+
+    var builtUnsignedTx: UnsignedTx
+    if (this.core.getNetwork().P.lockModeBondDeposit) {
+      const executor = new CaminoExecutor(this)
+
+      builtUnsignedTx = await executor.buildCreateSubnetTx(
+        networkID,
+        blockchainID,
+        from,
+        change,
+        owners,
+        subnetOwnerThreshold,
+        fee,
+        avaxAssetID,
+        memo,
+        changeThreshold
+      )
+    } else {
+      builtUnsignedTx = utxoset.buildCreateSubnetTx(
+        networkID,
+        blockchainID,
+        from,
+        change,
+        owners,
+        subnetOwnerThreshold,
+        fee,
+        avaxAssetID,
+        memo,
+        asOf,
+        changeThreshold
+      )
+    }
 
     if (!(await this.checkGooseEgg(builtUnsignedTx, this.getCreationTxFee()))) {
       /* istanbul ignore next */
@@ -1835,6 +1962,7 @@ export class PlatformVMAPI extends JRPCAPI {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param subnetAuthCredentials Optional. An array of index and address to sign for each SubnetAuth.
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
@@ -1849,7 +1977,8 @@ export class PlatformVMAPI extends JRPCAPI {
     genesisData: string | GenesisData = undefined,
     memo: PayloadBase | Buffer = undefined,
     asOf: BN = UnixNow(),
-    subnetAuthCredentials: [number, Buffer][] = []
+    subnetAuthCredentials: [number, Buffer][] = [],
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const from: Buffer[] = this._cleanAddressArray(
       fromAddresses,
@@ -1870,22 +1999,46 @@ export class PlatformVMAPI extends JRPCAPI {
     const networkID: number = this.core.getNetworkID()
     const blockchainID: Buffer = bintools.cb58Decode(this.blockchainID)
     const fee: BN = this.getCreateChainTxFee()
-    const builtUnsignedTx: UnsignedTx = utxoset.buildCreateChainTx(
-      networkID,
-      blockchainID,
-      from,
-      change,
-      subnetID,
-      chainName,
-      vmID,
-      fxIDs,
-      genesisData,
-      fee,
-      avaxAssetID,
-      memo,
-      asOf,
-      subnetAuthCredentials
-    )
+
+    var builtUnsignedTx: UnsignedTx
+    if (this.core.getNetwork().P.lockModeBondDeposit) {
+      const executor = new CaminoExecutor(this)
+
+      builtUnsignedTx = await executor.buildCreateChainTx(
+        networkID,
+        blockchainID,
+        from,
+        change,
+        subnetID,
+        chainName,
+        vmID,
+        fxIDs,
+        genesisData,
+        fee,
+        avaxAssetID,
+        memo,
+        subnetAuthCredentials,
+        changeThreshold
+      )
+    } else {
+      builtUnsignedTx = utxoset.buildCreateChainTx(
+        networkID,
+        blockchainID,
+        from,
+        change,
+        subnetID,
+        chainName,
+        vmID,
+        fxIDs,
+        genesisData,
+        fee,
+        avaxAssetID,
+        memo,
+        asOf,
+        subnetAuthCredentials,
+        changeThreshold
+      )
+    }
 
     if (!(await this.checkGooseEgg(builtUnsignedTx, this.getCreationTxFee()))) {
       /* istanbul ignore next */
@@ -1905,17 +2058,19 @@ export class PlatformVMAPI extends JRPCAPI {
    * @param address The consortiumMemberAddress, single or multi-sig.
    * @param consortiumMemberAuthCredentials An array of index and address to sign for each SubnetAuth.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
   buildRegisterNodeTx = async (
     fromAddresses: string[],
-    changeAddresses: string[],
+    changeAddresses: string[] = undefined,
     oldNodeID: string | Buffer = undefined,
     newNodeID: string | Buffer = undefined,
     address: Buffer = undefined,
     consortiumMemberAuthCredentials: [number, Buffer][] = [],
-    memo: PayloadBase | Buffer = undefined
+    memo: PayloadBase | Buffer = undefined,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const from: Buffer[] = this._cleanAddressArray(
       fromAddresses,
@@ -1948,7 +2103,8 @@ export class PlatformVMAPI extends JRPCAPI {
       consortiumMemberAuthCredentials,
       fee,
       avaxAssetID,
-      memo
+      memo,
+      changeThreshold
     )
 
     if (!(await this.checkGooseEgg(builtUnsignedTx, this.getCreationTxFee()))) {
@@ -2077,7 +2233,10 @@ export class PlatformVMAPI extends JRPCAPI {
    */
   spend = async (
     from: string[] | string,
-    changeAddr: string,
+    to: string[],
+    toThreshold: number,
+    change: string[],
+    changeThreshold: number,
     lockMode: "Unlocked" | "Deposit" | "Bond",
     amountToLock: BN,
     amountToBurn: BN,
@@ -2085,7 +2244,14 @@ export class PlatformVMAPI extends JRPCAPI {
   ): Promise<SpendReply> => {
     const params: SpendParams = {
       from,
-      changeAddr,
+      to:
+        to.length > 0
+          ? { lockTime: 0, threshold: toThreshold, addresses: to }
+          : undefined,
+      change:
+        change.length > 0
+          ? { lockTime: 0, threshold: changeThreshold, addresses: change }
+          : undefined,
       lockMode: lockMode === "Unlocked" ? 0 : lockMode === "Deposit" ? 1 : 2,
       amountToLock: amountToLock.toString(),
       amountToBurn: amountToBurn.toString(),
diff --git a/src/apis/platformvm/camino_executor.ts b/src/apis/platformvm/camino_executor.ts
index 7615ccda9..a94e7568a 100644
--- a/src/apis/platformvm/camino_executor.ts
+++ b/src/apis/platformvm/camino_executor.ts
@@ -7,18 +7,38 @@ import BN from "bn.js"
 
 import { Buffer } from "buffer/"
 import { DefaultNetworkID, UnixNow } from "../../utils"
-import { TimeError } from "../../utils/errors"
+import BinTools from "../../utils/bintools"
 import {
+  AddressError,
+  FeeAssetError,
+  ThresholdError,
+  TimeError
+} from "../../utils/errors"
+import {
+  AddSubnetValidatorTx,
+  AmountOutput,
   AssetAmountDestination,
+  BaseTx,
   CaminoAddValidatorTx,
+  CreateChainTx,
+  CreateSubnetTx,
+  ExportTx,
+  ImportTx,
   ParseableOutput,
   PlatformVMAPI,
   RegisterNodeTx,
   SECPOwnerOutput,
+  SECPTransferInput,
+  SECPTransferOutput,
+  SelectOutputClass,
   TransferableInput,
   TransferableOutput,
-  UnsignedTx
+  UnsignedTx,
+  UTXO
 } from "."
+import { GenesisData } from "../avm"
+
+const bintools: BinTools = BinTools.getInstance()
 
 type CaminoLockMode = "Unlocked" | "Bond" | "Deposit"
 
@@ -37,16 +57,23 @@ export class CaminoExecutor {
     const addr = aad
       .getSenders()
       .map((a) => this.platformAPI.addressFromBuffer(a))
-    const changeAddr =
-      aad.getChangeAddresses().length > 0
-        ? this.platformAPI.addressFromBuffer(aad.getChangeAddresses()[0])
-        : ""
+
+    const to = aad
+      .getDestinations()
+      .map((a) => this.platformAPI.addressFromBuffer(a))
+
+    const change = aad
+      .getChangeAddresses()
+      .map((a) => this.platformAPI.addressFromBuffer(a))
 
     const aa = aad.getAssetAmount(feeAssetID.toString("hex"))
 
     const result = await this.platformAPI.spend(
       addr,
-      changeAddr,
+      to,
+      aad.getDestinationsThreshold(),
+      change,
+      aad.getChangeAddressesThreshold(),
       lockMode,
       aa.getAmount(),
       aa.getBurn()
@@ -79,6 +106,8 @@ export class CaminoExecutor {
    * @param rewardLocktime Optional. The locktime field created in the resulting reward outputs
    * @param rewardThreshold Opional. The number of signatures required to spend the funds in the resultant reward UTXO. Default 1.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the received UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
@@ -96,7 +125,9 @@ export class CaminoExecutor {
     rewardLocktime: BN = new BN(0),
     rewardThreshold: number = 1,
     memo: Buffer = undefined,
-    avaxAssetID: Buffer
+    avaxAssetID: Buffer,
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     let ins: TransferableInput[] = []
     let outs: TransferableOutput[] = []
@@ -111,8 +142,10 @@ export class CaminoExecutor {
 
     const aad: AssetAmountDestination = new AssetAmountDestination(
       to,
+      toThreshold,
       from,
-      change
+      change,
+      changeThreshold
     )
 
     aad.addAssetAmount(avaxAssetID, stakeAmount, new BN(0))
@@ -161,6 +194,7 @@ export class CaminoExecutor {
    * @param fee Optional. The amount of fees to burn in its smallest denomination, represented as {@link https://github.com/indutny/bn.js/|BN}
    * @param feeAssetID Optional. The assetID of the fees being burned
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned RegisterNodeTx created from the passed in parameters.
    */
@@ -175,7 +209,8 @@ export class CaminoExecutor {
     consortiumMemberAuthCredentials: [number, Buffer][] = [],
     fee: BN = undefined,
     feeAssetID: Buffer = undefined,
-    memo: Buffer = undefined
+    memo: Buffer = undefined,
+    changeThreshold: number = 1
   ): Promise<UnsignedTx> => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -183,9 +218,11 @@ export class CaminoExecutor {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
 
       aad.addAssetAmount(feeAssetID, zero, fee)
@@ -225,6 +262,595 @@ export class CaminoExecutor {
     return new UnsignedTx(registerNodeTx)
   }
 
+  /**
+   * Creates an [[UnsignedTx]] wrapping a [[BaseTx]]. For more granular control, you may create your own
+   * [[UnsignedTx]] wrapping a [[BaseTx]] manually (with their corresponding [[TransferableInput]]s and [[TransferableOutput]]s).
+   *
+   * @param networkID The number representing NetworkID of the node
+   * @param blockchainID The {@link https://github.com/feross/buffer|Buffer} representing the BlockchainID for the transaction
+   * @param amount The amount of the asset to be spent in its smallest denomination, represented as {@link https://github.com/indutny/bn.js/|BN}.
+   * @param assetID {@link https://github.com/feross/buffer|Buffer} of the asset ID for the UTXO
+   * @param toAddresses The addresses to send the funds
+   * @param fromAddresses The addresses being used to send the funds from the UTXOs {@link https://github.com/feross/buffer|Buffer}
+   * @param changeAddresses Optional. The addresses that can spend the change remaining from the spent UTXOs. Default: toAddresses
+   * @param fee Optional. The amount of fees to burn in its smallest denomination, represented as {@link https://github.com/indutny/bn.js/|BN}
+   * @param feeAssetID Optional. The assetID of the fees being burned. Default: assetID
+   * @param memo Optional. Contains arbitrary data, up to 256 bytes
+   * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param locktime Optional. The locktime field created in the resulting outputs
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
+   * @returns An unsigned transaction created from the passed in parameters.
+   *
+   */
+  buildBaseTx = async (
+    networkID: number,
+    blockchainID: Buffer,
+    amount: BN,
+    assetID: Buffer,
+    toAddresses: Buffer[],
+    fromAddresses: Buffer[],
+    changeAddresses: Buffer[] = undefined,
+    fee: BN = undefined,
+    feeAssetID: Buffer = undefined,
+    memo: Buffer = undefined,
+    toThreshold: number = 1,
+    changeThreshold: number = 1
+  ): Promise<UnsignedTx> => {
+    if (toThreshold > toAddresses.length) {
+      /* istanbul ignore next */
+      throw new ThresholdError(
+        "Error - UTXOSet.buildBaseTx: threshold is greater than number of addresses"
+      )
+    }
+
+    if (typeof changeAddresses === "undefined") {
+      changeAddresses = []
+    }
+
+    if (typeof feeAssetID === "undefined") {
+      feeAssetID = assetID
+    }
+
+    const zero: BN = new BN(0)
+
+    if (amount.eq(zero)) {
+      return undefined
+    }
+
+    const aad: AssetAmountDestination = new AssetAmountDestination(
+      toAddresses,
+      toThreshold,
+      fromAddresses,
+      changeAddresses,
+      changeThreshold
+    )
+    if (assetID.toString("hex") === feeAssetID.toString("hex")) {
+      aad.addAssetAmount(assetID, amount, fee)
+    } else {
+      aad.addAssetAmount(assetID, amount, zero)
+      if (this._feeCheck(fee, feeAssetID)) {
+        aad.addAssetAmount(feeAssetID, zero, fee)
+      }
+    }
+
+    let ins: TransferableInput[] = []
+    let outs: TransferableOutput[] = []
+
+    const minSpendableErr: Error = await this.spend(aad, "Unlocked", feeAssetID)
+    if (typeof minSpendableErr === "undefined") {
+      ins = aad.getInputs()
+      outs = aad.getAllOutputs()
+    } else {
+      throw minSpendableErr
+    }
+
+    const baseTx: BaseTx = new BaseTx(networkID, blockchainID, outs, ins, memo)
+    return new UnsignedTx(baseTx)
+  }
+
+  /**
+   * Creates an unsigned ImportTx transaction.
+   *
+   * @param networkID The number representing NetworkID of the node
+   * @param blockchainID The {@link https://github.com/feross/buffer|Buffer} representing the BlockchainID for the transaction
+   * @param toAddresses The addresses to send the funds
+   * @param fromAddresses The addresses being used to send the funds from the UTXOs {@link https://github.com/feross/buffer|Buffer}
+   * @param changeAddresses Optional. The addresses that can spend the change remaining from the spent UTXOs. Default: toAddresses
+   * @param importIns An array of [[TransferableInput]]s being imported
+   * @param sourceChain A {@link https://github.com/feross/buffer|Buffer} for the chainid where the imports are coming from.
+   * @param fee Optional. The amount of fees to burn in its smallest denomination, represented as {@link https://github.com/indutny/bn.js/|BN}. Fee will come from the inputs first, if they can.
+   * @param feeAssetID Optional. The assetID of the fees being burned.
+   * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param locktime Optional. The locktime field created in the resulting outputs
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the received UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
+   * @returns An unsigned transaction created from the passed in parameters.
+   *
+   */
+  buildImportTx = async (
+    networkID: number,
+    blockchainID: Buffer,
+    toAddresses: Buffer[],
+    fromAddresses: Buffer[],
+    changeAddresses: Buffer[],
+    atomics: UTXO[],
+    sourceChain: Buffer = undefined,
+    fee: BN = undefined,
+    feeAssetID: Buffer = undefined,
+    memo: Buffer = undefined,
+    locktime: BN = new BN(0),
+    toThreshold: number = 1,
+    changeThreshold: number = 1
+  ): Promise<UnsignedTx> => {
+    const zero: BN = new BN(0)
+    let ins: TransferableInput[] = []
+    let outs: TransferableOutput[] = []
+    if (typeof fee === "undefined") {
+      fee = zero.clone()
+    }
+
+    const importIns: TransferableInput[] = []
+    let feepaid: BN = new BN(0)
+    let feeAssetStr: string = feeAssetID.toString("hex")
+    for (let i: number = 0; i < atomics.length; i++) {
+      const utxo: UTXO = atomics[`${i}`]
+      const assetID: Buffer = utxo.getAssetID()
+      const output: AmountOutput = utxo.getOutput() as AmountOutput
+      let amt: BN = output.getAmount().clone()
+
+      let infeeamount = amt.clone()
+      let assetStr: string = assetID.toString("hex")
+      if (
+        typeof feeAssetID !== "undefined" &&
+        fee.gt(zero) &&
+        feepaid.lt(fee) &&
+        assetStr === feeAssetStr
+      ) {
+        feepaid = feepaid.add(infeeamount)
+        if (feepaid.gte(fee)) {
+          infeeamount = feepaid.sub(fee)
+          feepaid = fee.clone()
+        } else {
+          infeeamount = zero.clone()
+        }
+      }
+
+      const txid: Buffer = utxo.getTxID()
+      const outputidx: Buffer = utxo.getOutputIdx()
+      const input: SECPTransferInput = new SECPTransferInput(amt)
+      const xferin: TransferableInput = new TransferableInput(
+        txid,
+        outputidx,
+        assetID,
+        input
+      )
+      const from: Buffer[] = output.getAddresses()
+      const spenders: Buffer[] = output.getSpenders(from)
+      for (let j: number = 0; j < spenders.length; j++) {
+        const idx: number = output.getAddressIdx(spenders[`${j}`])
+        if (idx === -1) {
+          /* istanbul ignore next */
+          throw new AddressError(
+            "Error - UTXOSet.buildImportTx: no such " +
+              `address in output: ${spenders[`${j}`]}`
+          )
+        }
+        xferin.getInput().addSignatureIdx(idx, spenders[`${j}`])
+      }
+      importIns.push(xferin)
+      //add extra outputs for each amount (calculated from the imported inputs), minus fees
+      if (infeeamount.gt(zero)) {
+        const spendout: AmountOutput = SelectOutputClass(
+          output.getOutputID(),
+          infeeamount,
+          toAddresses,
+          locktime,
+          toThreshold
+        ) as AmountOutput
+        const xferout: TransferableOutput = new TransferableOutput(
+          assetID,
+          spendout
+        )
+        outs.push(xferout)
+      }
+    }
+
+    // get remaining fees from the provided addresses
+    let feeRemaining: BN = fee.sub(feepaid)
+    if (feeRemaining.gt(zero) && this._feeCheck(feeRemaining, feeAssetID)) {
+      const aad: AssetAmountDestination = new AssetAmountDestination(
+        toAddresses,
+        toThreshold,
+        fromAddresses,
+        changeAddresses,
+        changeThreshold
+      )
+
+      aad.addAssetAmount(feeAssetID, zero, feeRemaining)
+      const minSpendableErr: Error = await this.spend(
+        aad,
+        "Unlocked",
+        feeAssetID
+      )
+      if (typeof minSpendableErr === "undefined") {
+        ins = aad.getInputs()
+        outs = aad.getAllOutputs()
+      } else {
+        throw minSpendableErr
+      }
+    }
+
+    const importTx: ImportTx = new ImportTx(
+      networkID,
+      blockchainID,
+      outs,
+      ins,
+      memo,
+      sourceChain,
+      importIns
+    )
+    return new UnsignedTx(importTx)
+  }
+
+  /**
+   * Creates an unsigned ExportTx transaction.
+   *
+   * @param networkID The number representing NetworkID of the node
+   * @param blockchainID The {@link https://github.com/feross/buffer|Buffer} representing the BlockchainID for the transaction
+   * @param amount The amount being exported as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param avaxAssetID {@link https://github.com/feross/buffer|Buffer} of the asset ID for AVAX
+   * @param toAddresses An array of addresses as {@link https://github.com/feross/buffer|Buffer} who recieves the AVAX
+   * @param fromAddresses An array of addresses as {@link https://github.com/feross/buffer|Buffer} who owns the AVAX
+   * @param changeAddresses An array of addresses as {@link https://github.com/feross/buffer|Buffer} who gets the change leftover of the AVAX
+   * @param destinationChain Optional. A {@link https://github.com/feross/buffer|Buffer} for the chainid where to send the asset.
+   * @param fee Optional. The amount of fees to burn in its smallest denomination, represented as {@link https://github.com/indutny/bn.js/|BN}
+   * @param feeAssetID Optional. The assetID of the fees being burned.
+   * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param locktime Optional. The locktime field created in the resulting outputs
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the received UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
+   * @returns An unsigned transaction created from the passed in parameters.
+   *
+   */
+  buildExportTx = async (
+    networkID: number,
+    blockchainID: Buffer,
+    amount: BN,
+    avaxAssetID: Buffer, // TODO: rename this to amountAssetID
+    toAddresses: Buffer[],
+    fromAddresses: Buffer[],
+    changeAddresses: Buffer[] = undefined,
+    destinationChain: Buffer = undefined,
+    fee: BN = undefined,
+    feeAssetID: Buffer = undefined,
+    memo: Buffer = undefined,
+    locktime: BN = new BN(0),
+    toThreshold: number = 1,
+    changeThreshold: number = 1
+  ): Promise<UnsignedTx> => {
+    let ins: TransferableInput[] = []
+    let outs: TransferableOutput[] = []
+
+    if (typeof changeAddresses === "undefined") {
+      changeAddresses = toAddresses
+    }
+
+    const zero: BN = new BN(0)
+
+    if (amount.eq(zero)) {
+      return undefined
+    }
+
+    if (typeof feeAssetID === "undefined") {
+      feeAssetID = avaxAssetID
+    } else if (feeAssetID.toString("hex") !== avaxAssetID.toString("hex")) {
+      /* istanbul ignore next */
+      throw new FeeAssetError(
+        "Error - CaminoExecutor.buildExportTx: " +
+          `feeAssetID must match avaxAssetID`
+      )
+    }
+
+    if (typeof destinationChain === "undefined") {
+      destinationChain = bintools.cb58Decode(
+        this.platformAPI.getNetwork().X.blockchainID
+      )
+    }
+
+    const aad: AssetAmountDestination = new AssetAmountDestination(
+      [],
+      0,
+      fromAddresses,
+      changeAddresses,
+      changeThreshold
+    )
+
+    aad.addAssetAmount(avaxAssetID, new BN(0), fee.add(amount))
+
+    const minSpendableErr: Error = await this.spend(aad, "Unlocked", feeAssetID)
+    if (typeof minSpendableErr === "undefined") {
+      ins = aad.getInputs()
+      outs = aad.getAllOutputs()
+    } else {
+      throw minSpendableErr
+    }
+
+    const exportTx: ExportTx = new ExportTx(
+      networkID,
+      blockchainID,
+      outs,
+      ins,
+      memo,
+      destinationChain,
+      [
+        new SECPTransferOutput(
+          amount,
+          toAddresses,
+          locktime,
+          toThreshold
+        ).makeTransferable(avaxAssetID)
+      ]
+    )
+
+    return new UnsignedTx(exportTx)
+  }
+
+  /**
+   * Class representing an unsigned [[AddSubnetValidatorTx]] transaction.
+   *
+   * @param networkID Networkid, [[DefaultNetworkID]]
+   * @param blockchainID Blockchainid, default undefined
+   * @param fromAddresses An array of addresses as {@link https://github.com/feross/buffer|Buffer} who pays the fees in AVAX
+   * @param changeAddresses An array of addresses as {@link https://github.com/feross/buffer|Buffer} who gets the change leftover from the fee payment
+   * @param nodeID The node ID of the validator being added.
+   * @param startTime The Unix time when the validator starts validating the Primary Network.
+   * @param endTime The Unix time when the validator stops validating the Primary Network (and staked AVAX is returned).
+   * @param weight The amount of weight for this subnet validator.
+   * @param fee Optional. The amount of fees to burn in its smallest denomination, represented as {@link https://github.com/indutny/bn.js/|BN}
+   * @param feeAssetID Optional. The assetID of the fees being burned.
+   * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param subnetAuthCredentials Optional. An array of index and address to sign for each SubnetAuth.
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
+   * @returns An unsigned transaction created from the passed in parameters.
+   */
+  buildAddSubnetValidatorTx = async (
+    networkID: number = DefaultNetworkID,
+    blockchainID: Buffer,
+    fromAddresses: Buffer[],
+    changeAddresses: Buffer[],
+    nodeID: Buffer,
+    startTime: BN,
+    endTime: BN,
+    weight: BN,
+    subnetID: string,
+    fee: BN = undefined,
+    feeAssetID: Buffer = undefined,
+    memo: Buffer = undefined,
+    subnetAuthCredentials: [number, Buffer][] = [],
+    changeThreshold: number = 1
+  ): Promise<UnsignedTx> => {
+    let ins: TransferableInput[] = []
+    let outs: TransferableOutput[] = []
+
+    const zero: BN = new BN(0)
+    const now: BN = UnixNow()
+    if (startTime.lt(now) || endTime.lte(startTime)) {
+      throw new Error(
+        "CaminoExecutor.buildAddSubnetValidatorTx -- startTime must be in the future and endTime must come after startTime"
+      )
+    }
+
+    if (this._feeCheck(fee, feeAssetID)) {
+      const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
+        fromAddresses,
+        changeAddresses,
+        changeThreshold
+      )
+
+      aad.addAssetAmount(feeAssetID, zero, fee)
+      const minSpendableErr: Error = await this.spend(
+        aad,
+        "Unlocked",
+        feeAssetID
+      )
+      if (typeof minSpendableErr === "undefined") {
+        ins = aad.getInputs()
+        outs = aad.getAllOutputs()
+      } else {
+        throw minSpendableErr
+      }
+    }
+
+    const addSubnetValidatorTx: AddSubnetValidatorTx = new AddSubnetValidatorTx(
+      networkID,
+      blockchainID,
+      outs,
+      ins,
+      memo,
+      nodeID,
+      startTime,
+      endTime,
+      weight,
+      subnetID
+    )
+    subnetAuthCredentials.forEach(
+      (subnetAuthCredential: [number, Buffer]): void => {
+        addSubnetValidatorTx.addSignatureIdx(
+          subnetAuthCredential[0],
+          subnetAuthCredential[1]
+        )
+      }
+    )
+    return new UnsignedTx(addSubnetValidatorTx)
+  }
+
+  /**
+   * Class representing an unsigned [[CreateSubnetTx]] transaction.
+   *
+   * @param networkID Networkid, [[DefaultNetworkID]]
+   * @param blockchainID Blockchainid, default undefined
+   * @param fromAddresses The addresses being used to send the funds from the UTXOs {@link https://github.com/feross/buffer|Buffer}
+   * @param changeAddresses The addresses that can spend the change remaining from the spent UTXOs.
+   * @param subnetOwnerAddresses An array of {@link https://github.com/feross/buffer|Buffer} for the addresses to add to a subnet
+   * @param subnetOwnerThreshold The number of owners's signatures required to add a validator to the network
+   * @param fee Optional. The amount of fees to burn in its smallest denomination, represented as {@link https://github.com/indutny/bn.js/|BN}
+   * @param feeAssetID Optional. The assetID of the fees being burned
+   * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
+   * @returns An unsigned transaction created from the passed in parameters.
+   */
+  buildCreateSubnetTx = async (
+    networkID: number = DefaultNetworkID,
+    blockchainID: Buffer,
+    fromAddresses: Buffer[],
+    changeAddresses: Buffer[],
+    subnetOwnerAddresses: Buffer[],
+    subnetOwnerThreshold: number,
+    fee: BN = undefined,
+    feeAssetID: Buffer = undefined,
+    memo: Buffer = undefined,
+    changeThreshold: number = 1
+  ): Promise<UnsignedTx> => {
+    const zero: BN = new BN(0)
+    let ins: TransferableInput[] = []
+    let outs: TransferableOutput[] = []
+
+    if (this._feeCheck(fee, feeAssetID)) {
+      const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
+        fromAddresses,
+        changeAddresses,
+        changeThreshold
+      )
+
+      aad.addAssetAmount(feeAssetID, zero, fee)
+      const minSpendableErr: Error = await this.spend(
+        aad,
+        "Unlocked",
+        feeAssetID
+      )
+      if (typeof minSpendableErr === "undefined") {
+        ins = aad.getInputs()
+        outs = aad.getAllOutputs()
+      } else {
+        throw minSpendableErr
+      }
+    }
+
+    const locktime: BN = new BN(0)
+    const subnetOwners: SECPOwnerOutput = new SECPOwnerOutput(
+      subnetOwnerAddresses,
+      locktime,
+      subnetOwnerThreshold
+    )
+    const createSubnetTx: CreateSubnetTx = new CreateSubnetTx(
+      networkID,
+      blockchainID,
+      outs,
+      ins,
+      memo,
+      subnetOwners
+    )
+
+    return new UnsignedTx(createSubnetTx)
+  }
+
+  /**
+   * Build an unsigned [[CreateChainTx]].
+   *
+   * @param networkID Networkid, [[DefaultNetworkID]]
+   * @param blockchainID Blockchainid, default undefined
+   * @param fromAddresses The addresses being used to send the funds from the UTXOs {@link https://github.com/feross/buffer|Buffer}
+   * @param changeAddresses The addresses that can spend the change remaining from the spent UTXOs.
+   * @param subnetID Optional ID of the Subnet that validates this blockchain
+   * @param chainName Optional A human readable name for the chain; need not be unique
+   * @param vmID Optional ID of the VM running on the new chain
+   * @param fxIDs Optional IDs of the feature extensions running on the new chain
+   * @param genesisData Optional Byte representation of genesis state of the new chain
+   * @param fee Optional. The amount of fees to burn in its smallest denomination, represented as {@link https://github.com/indutny/bn.js/|BN}
+   * @param feeAssetID Optional. The assetID of the fees being burned
+   * @param memo Optional contains arbitrary bytes, up to 256 bytes
+   * @param subnetAuthCredentials Optional. An array of index and address to sign for each SubnetAuth.
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
+   *
+   * @returns An unsigned CreateChainTx created from the passed in parameters.
+   */
+  buildCreateChainTx = async (
+    networkID: number = DefaultNetworkID,
+    blockchainID: Buffer,
+    fromAddresses: Buffer[],
+    changeAddresses: Buffer[],
+    subnetID: string | Buffer = undefined,
+    chainName: string = undefined,
+    vmID: string = undefined,
+    fxIDs: string[] = undefined,
+    genesisData: string | GenesisData = undefined,
+    fee: BN = undefined,
+    feeAssetID: Buffer = undefined,
+    memo: Buffer = undefined,
+    subnetAuthCredentials: [number, Buffer][] = [],
+    changeThreshold: number = 1
+  ): Promise<UnsignedTx> => {
+    const zero: BN = new BN(0)
+    let ins: TransferableInput[] = []
+    let outs: TransferableOutput[] = []
+
+    if (this._feeCheck(fee, feeAssetID)) {
+      const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
+        fromAddresses,
+        changeAddresses,
+        changeThreshold
+      )
+
+      aad.addAssetAmount(feeAssetID, zero, fee)
+      const minSpendableErr: Error = await this.spend(
+        aad,
+        "Unlocked",
+        feeAssetID
+      )
+      if (typeof minSpendableErr === "undefined") {
+        ins = aad.getInputs()
+        outs = aad.getAllOutputs()
+      } else {
+        throw minSpendableErr
+      }
+    }
+
+    const createChainTx: CreateChainTx = new CreateChainTx(
+      networkID,
+      blockchainID,
+      outs,
+      ins,
+      memo,
+      subnetID,
+      chainName,
+      vmID,
+      fxIDs,
+      genesisData
+    )
+    subnetAuthCredentials.forEach(
+      (subnetAuthCredential: [number, Buffer]): void => {
+        createChainTx.addSignatureIdx(
+          subnetAuthCredential[0],
+          subnetAuthCredential[1]
+        )
+      }
+    )
+
+    return new UnsignedTx(createChainTx)
+  }
+
   _feeCheck(fee: BN, feeAssetID: Buffer): boolean {
     return (
       typeof fee !== "undefined" &&
diff --git a/src/apis/platformvm/interfaces.ts b/src/apis/platformvm/interfaces.ts
index 8fe42d9d3..938957e65 100644
--- a/src/apis/platformvm/interfaces.ts
+++ b/src/apis/platformvm/interfaces.ts
@@ -222,9 +222,17 @@ export interface GetMaxStakeAmountParams {
   endTime: BN
 }
 
+export interface OutputOwner {
+  lockTime: number
+  threshold: number
+  addresses: string[]
+}
+
 export interface SpendParams {
   from: string[] | string
-  changeAddr: string
+  to?: OutputOwner
+  change?: OutputOwner
+
   lockMode: 0 | 1 | 2
   amountToLock: string
   amountToBurn: string
diff --git a/src/apis/platformvm/utxos.ts b/src/apis/platformvm/utxos.ts
index 35af6ad03..88d4349c5 100644
--- a/src/apis/platformvm/utxos.ts
+++ b/src/apis/platformvm/utxos.ts
@@ -256,7 +256,6 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     aad: AssetAmountDestination,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1,
     stakeable: boolean = false
   ): Error => {
     let utxoArray: UTXO[] = this.getConsumableUXTO(asOf, stakeable)
@@ -482,7 +481,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
           unlockedChange,
           aad.getChangeAddresses(),
           zero.clone(), // make sure that we don't lock the change output.
-          threshold
+          aad.getChangeAddressesThreshold()
         ) as AmountOutput
         const transferOutput: TransferableOutput = new TransferableOutput(
           assetID,
@@ -509,7 +508,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
           unlockedAmount,
           aad.getDestinations(),
           locktime,
-          threshold
+          aad.getDestinationsThreshold()
         ) as AmountOutput
         const transferOutput: TransferableOutput = new TransferableOutput(
           assetID,
@@ -537,7 +536,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional. Contains arbitrary data, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    *
@@ -555,9 +555,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
-    if (threshold > toAddresses.length) {
+    if (toThreshold > toAddresses.length) {
       /* istanbul ignore next */
       throw new ThresholdError(
         "Error - UTXOSet.buildBaseTx: threshold is greater than number of addresses"
@@ -580,8 +581,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     const aad: AssetAmountDestination = new AssetAmountDestination(
       toAddresses,
+      toThreshold,
       fromAddresses,
-      changeAddresses
+      changeAddresses,
+      changeThreshold
     )
     if (assetID.toString("hex") === feeAssetID.toString("hex")) {
       aad.addAssetAmount(assetID, amount, fee)
@@ -595,12 +598,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     let ins: TransferableInput[] = []
     let outs: TransferableOutput[] = []
 
-    const minSpendableErr: Error = this.getMinimumSpendable(
-      aad,
-      asOf,
-      locktime,
-      threshold
-    )
+    const minSpendableErr: Error = this.getMinimumSpendable(aad, asOf, locktime)
     if (typeof minSpendableErr === "undefined") {
       ins = aad.getInputs()
       outs = aad.getAllOutputs()
@@ -627,7 +625,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the received UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    * @returns An unsigned transaction created from the passed in parameters.
    *
    */
@@ -644,7 +643,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -709,7 +709,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
           infeeamount,
           toAddresses,
           locktime,
-          threshold
+          toThreshold
         ) as AmountOutput
         const xferout: TransferableOutput = new TransferableOutput(
           assetID,
@@ -719,20 +719,25 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
       }
     }
 
+    if (typeof changeAddresses === "undefined") {
+      changeAddresses = fromAddresses
+    }
+
     // get remaining fees from the provided addresses
     let feeRemaining: BN = fee.sub(feepaid)
     if (feeRemaining.gt(zero) && this._feeCheck(feeRemaining, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
         toAddresses,
+        toThreshold,
         fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, feeRemaining)
       const minSpendableErr: Error = this.getMinimumSpendable(
         aad,
         asOf,
-        locktime,
-        threshold
+        locktime
       )
       if (typeof minSpendableErr === "undefined") {
         ins = aad.getInputs()
@@ -770,7 +775,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param locktime Optional. The locktime field created in the resulting outputs
-   * @param threshold Optional. The number of signatures required to spend the funds in the resultant UTXO
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the received UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the resultant change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    *
@@ -789,14 +795,15 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
     locktime: BN = new BN(0),
-    threshold: number = 1
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
     let ins: TransferableInput[] = []
     let outs: TransferableOutput[] = []
     let exportouts: TransferableOutput[] = []
 
     if (typeof changeAddresses === "undefined") {
-      changeAddresses = toAddresses
+      changeAddresses = fromAddresses
     }
 
     const zero: BN = new BN(0)
@@ -822,8 +829,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     const aad: AssetAmountDestination = new AssetAmountDestination(
       toAddresses,
+      toThreshold,
       fromAddresses,
-      changeAddresses
+      changeAddresses,
+      changeThreshold
     )
     if (avaxAssetID.toString("hex") === feeAssetID.toString("hex")) {
       aad.addAssetAmount(avaxAssetID, amount, fee)
@@ -834,12 +843,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
       }
     }
 
-    const minSpendableErr: Error = this.getMinimumSpendable(
-      aad,
-      asOf,
-      locktime,
-      threshold
-    )
+    const minSpendableErr: Error = this.getMinimumSpendable(aad, asOf, locktime)
     if (typeof minSpendableErr === "undefined") {
       ins = aad.getInputs()
       outs = aad.getChangeOutputs()
@@ -877,6 +881,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param subnetAuthCredentials Optional. An array of index and address to sign for each SubnetAuth.
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
@@ -894,7 +899,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
-    subnetAuthCredentials: [number, Buffer][] = []
+    subnetAuthCredentials: [number, Buffer][] = [],
+    changeThreshold: number = 1
   ): UnsignedTx => {
     let ins: TransferableInput[] = []
     let outs: TransferableOutput[] = []
@@ -909,16 +915,17 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, fee)
       const success: Error = this.getMinimumSpendable(
         aad,
         asOf,
         undefined,
-        undefined,
         true
       )
       if (typeof success === "undefined") {
@@ -972,6 +979,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param feeAssetID Optional. The assetID of the fees being burned.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the stake UTXO
    * @param changeThreshold Optional. The number of signatures required to spend the funds in the change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
@@ -994,6 +1002,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
+    toThreshold: number = 1,
     changeThreshold: number = 1
   ): UnsignedTx => {
     if (rewardThreshold > rewardAddresses.length) {
@@ -1021,8 +1030,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     const aad: AssetAmountDestination = new AssetAmountDestination(
       toAddresses,
+      toThreshold,
       fromAddresses,
-      changeAddresses
+      changeAddresses,
+      changeThreshold
     )
     if (avaxAssetID.toString("hex") === feeAssetID.toString("hex")) {
       aad.addAssetAmount(avaxAssetID, stakeAmount, fee)
@@ -1037,7 +1048,6 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
       aad,
       asOf,
       undefined,
-      changeThreshold,
       true
     )
     if (typeof minSpendableErr === "undefined") {
@@ -1092,8 +1102,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param feeAssetID Optional. The assetID of the fees being burned.
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
-   *
-   * @returns An unsigned transaction created from the passed in parameters.
+   * @param toThreshold Optional. The number of signatures required to spend the funds in the stake UTXO
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the change UTXO
    */
   buildAddValidatorTx = (
     networkID: number = DefaultNetworkID,
@@ -1113,7 +1123,9 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     fee: BN = undefined,
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    toThreshold: number = 1,
+    changeThreshold: number = 1
   ): UnsignedTx => {
     let ins: TransferableInput[] = []
     let outs: TransferableOutput[] = []
@@ -1135,8 +1147,10 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     const aad: AssetAmountDestination = new AssetAmountDestination(
       toAddresses,
+      toThreshold,
       fromAddresses,
-      changeAddresses
+      changeAddresses,
+      changeThreshold
     )
     if (avaxAssetID.toString("hex") === feeAssetID.toString("hex")) {
       aad.addAssetAmount(avaxAssetID, stakeAmount, fee)
@@ -1151,7 +1165,6 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
       aad,
       asOf,
       undefined,
-      undefined,
       true
     )
     if (typeof minSpendableErr === "undefined") {
@@ -1198,6 +1211,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param feeAssetID Optional. The assetID of the fees being burned
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the change UTXO
    *
    * @returns An unsigned transaction created from the passed in parameters.
    */
@@ -1211,7 +1225,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     fee: BN = undefined,
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
-    asOf: BN = UnixNow()
+    asOf: BN = UnixNow(),
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -1219,9 +1234,11 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, fee)
       const minSpendableErr: Error = this.getMinimumSpendable(
@@ -1273,6 +1290,7 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
    * @param memo Optional contains arbitrary bytes, up to 256 bytes
    * @param asOf Optional. The timestamp to verify the transaction against as a {@link https://github.com/indutny/bn.js/|BN}
    * @param subnetAuthCredentials Optional. An array of index and address to sign for each SubnetAuth.
+   * @param changeThreshold Optional. The number of signatures required to spend the funds in the change UTXO
    *
    * @returns An unsigned CreateChainTx created from the passed in parameters.
    */
@@ -1290,7 +1308,8 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
     feeAssetID: Buffer = undefined,
     memo: Buffer = undefined,
     asOf: BN = UnixNow(),
-    subnetAuthCredentials: [number, Buffer][] = []
+    subnetAuthCredentials: [number, Buffer][] = [],
+    changeThreshold: number = 1
   ): UnsignedTx => {
     const zero: BN = new BN(0)
     let ins: TransferableInput[] = []
@@ -1298,9 +1317,11 @@ export class UTXOSet extends StandardUTXOSet<UTXO> {
 
     if (this._feeCheck(fee, feeAssetID)) {
       const aad: AssetAmountDestination = new AssetAmountDestination(
+        [],
+        0,
         fromAddresses,
-        fromAddresses,
-        changeAddresses
+        changeAddresses,
+        changeThreshold
       )
       aad.addAssetAmount(feeAssetID, zero, fee)
       const minSpendableErr: Error = this.getMinimumSpendable(
diff --git a/src/common/assetamount.ts b/src/common/assetamount.ts
index e205fe0de..a22e849b8 100644
--- a/src/common/assetamount.ts
+++ b/src/common/assetamount.ts
@@ -113,8 +113,10 @@ export abstract class StandardAssetAmountDestination<
 > {
   protected amounts: AssetAmount[] = []
   protected destinations: Buffer[] = []
+  protected destinationsThreshold: number = 0
   protected senders: Buffer[] = []
   protected changeAddresses: Buffer[] = []
+  protected changeAddressesThreshold: number = 0
   protected amountkey: object = {}
   protected inputs: TI[] = []
   protected outputs: TO[] = []
@@ -148,6 +150,10 @@ export abstract class StandardAssetAmountDestination<
     return this.destinations
   }
 
+  getDestinationsThreshold = (): number => {
+    return this.destinationsThreshold
+  }
+
   getSenders = (): Buffer[] => {
     return this.senders
   }
@@ -156,6 +162,10 @@ export abstract class StandardAssetAmountDestination<
     return this.changeAddresses
   }
 
+  getChangeAddressesThreshold = (): number => {
+    return this.changeAddressesThreshold
+  }
+
   getAssetAmount = (assetHexStr: string): AssetAmount => {
     return this.amountkey[`${assetHexStr}`]
   }
@@ -191,11 +201,15 @@ export abstract class StandardAssetAmountDestination<
 
   constructor(
     destinations: Buffer[],
+    destinationsThreshold: number,
     senders: Buffer[],
-    changeAddresses: Buffer[]
+    changeAddresses: Buffer[],
+    changeAddressesThreshold: number
   ) {
     this.destinations = destinations
+    this, (destinationsThreshold = destinationsThreshold)
     this.changeAddresses = changeAddresses
+    this.changeAddressesThreshold = changeAddressesThreshold
     this.senders = senders
   }
 }