diff --git a/src/apis/evm/api.ts b/src/apis/evm/api.ts
index ffb7a58a4..c242436a2 100644
--- a/src/apis/evm/api.ts
+++ b/src/apis/evm/api.ts
@@ -573,7 +573,7 @@ export class EVMAPI extends JRPCAPI {
    * This helper exists because the endpoint API should be the primary point of entry for most functionality.
    */
   buildImportTx = async (
-    utxoset: UTXOSet,
+    utxoset: UTXOSet | undefined,
     toAddress: string,
     ownerAddresses: string[],
     sourceChain: Buffer | string,
@@ -595,13 +595,18 @@ export class EVMAPI extends JRPCAPI {
         "Error - EVMAPI.buildImportTx: sourceChain is undefined or invalid sourceChain type."
       )
     }
-    const utxoResponse: UTXOResponse = await this.getUTXOs(
-      ownerAddresses,
-      srcChain,
-      0,
-      undefined
-    )
-    const atomicUTXOs: UTXOSet = utxoResponse.utxos
+
+    var atomicUTXOs = utxoset
+    if (!utxoset) {
+      const utxoResponse: UTXOResponse = await this.getUTXOs(
+        ownerAddresses,
+        srcChain,
+        0,
+        undefined
+      )
+      atomicUTXOs = utxoResponse.utxos
+    }
+
     const networkID: number = this.core.getNetworkID()
     const avaxAssetID: string = this.core.getNetwork().X.avaxAssetID
     const avaxAssetIDBuf: Buffer = bintools.cb58Decode(avaxAssetID)
@@ -613,7 +618,7 @@ export class EVMAPI extends JRPCAPI {
       )
     }
 
-    const builtUnsignedTx: UnsignedTx = utxoset.buildImportTx(
+    const builtUnsignedTx: UnsignedTx = atomicUTXOs.buildImportTx(
       networkID,
       bintools.cb58Decode(this.blockchainID),
       toAddress,
diff --git a/src/apis/evm/basetx.ts b/src/apis/evm/basetx.ts
index 82f4c8877..c3e3504cd 100644
--- a/src/apis/evm/basetx.ts
+++ b/src/apis/evm/basetx.ts
@@ -5,9 +5,9 @@
 
 import { Buffer } from "buffer/"
 import BinTools from "../../utils/bintools"
-import { KeyChain, KeyPair } from "./keychain"
 import { EVMStandardBaseTx } from "../../common/evmtx"
 import { Credential } from "../../common/credentials"
+import { SignerKeyChain, SignerKeyPair } from "../../common/keychain"
 import { DefaultNetworkID } from "../../utils/constants"
 import { SelectTxClass } from "./tx"
 import { SerializedEncoding } from "../../utils/serialization"
@@ -20,7 +20,10 @@ const bintools: BinTools = BinTools.getInstance()
 /**
  * Class representing a base for all transactions.
  */
-export class EVMBaseTx extends EVMStandardBaseTx<KeyPair, KeyChain> {
+export class EVMBaseTx extends EVMStandardBaseTx<
+  SignerKeyPair,
+  SignerKeyChain
+> {
   protected _typeName = "BaseTx"
   protected _typeID = undefined
 
@@ -63,7 +66,7 @@ export class EVMBaseTx extends EVMStandardBaseTx<KeyPair, KeyChain> {
    * @returns An array of [[Credential]]s
    */
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
-  sign(msg: Buffer, kc: KeyChain): Credential[] {
+  sign(msg: Buffer, kc: SignerKeyChain): Credential[] {
     const creds: Credential[] = []
     return creds
   }
diff --git a/src/apis/evm/exporttx.ts b/src/apis/evm/exporttx.ts
index 1419a6088..08cc4f333 100644
--- a/src/apis/evm/exporttx.ts
+++ b/src/apis/evm/exporttx.ts
@@ -6,10 +6,10 @@
 import { Buffer } from "buffer/"
 import BinTools from "../../utils/bintools"
 import { EVMConstants } from "./constants"
-import { KeyChain, KeyPair } from "./keychain"
 import { EVMBaseTx } from "./basetx"
 import { SelectCredentialClass } from "./credentials"
-import { Signature, SigIdx, Credential } from "../../common/credentials"
+import { Credential, Signature, SigIdx } from "../../common/credentials"
+import { SignerKeyChain, SignerKeyPair } from "../../common/keychain"
 import { EVMInput } from "./inputs"
 import { Serialization, SerializedEncoding } from "../../utils/serialization"
 import { TransferableOutput } from "./outputs"
@@ -161,13 +161,13 @@ export class ExportTx extends EVMBaseTx {
    *
    * @returns An array of [[Credential]]s
    */
-  sign(msg: Buffer, kc: KeyChain): Credential[] {
+  sign(msg: Buffer, kc: SignerKeyChain): Credential[] {
     const creds: Credential[] = super.sign(msg, kc)
     this.inputs.forEach((input: EVMInput) => {
       const cred: Credential = SelectCredentialClass(input.getCredentialID())
       const sigidxs: SigIdx[] = input.getSigIdxs()
       sigidxs.forEach((sigidx: SigIdx) => {
-        const keypair: KeyPair = kc.getKey(sigidx.getSource())
+        const keypair: SignerKeyPair = kc.getKey(sigidx.getSource())
         const signval: Buffer = keypair.sign(msg)
         const sig: Signature = new Signature()
         sig.fromBuffer(signval)
diff --git a/src/apis/evm/importtx.ts b/src/apis/evm/importtx.ts
index be154f2e4..25771c396 100644
--- a/src/apis/evm/importtx.ts
+++ b/src/apis/evm/importtx.ts
@@ -11,9 +11,9 @@ import { EVMOutput } from "./outputs"
 import { TransferableInput } from "./inputs"
 import { EVMBaseTx } from "./basetx"
 import { SelectCredentialClass } from "./credentials"
-import { Signature, SigIdx, Credential } from "../../common/credentials"
+import { Credential, Signature, SigIdx } from "../../common/credentials"
+import { SignerKeyChain, SignerKeyPair } from "../../common/keychain"
 import { StandardAmountInput } from "../../common/input"
-import { KeyChain, KeyPair } from "./keychain"
 import { DefaultNetworkID } from "../../utils/constants"
 import {
   ChainIdError,
@@ -47,7 +47,8 @@ export class ImportTx extends EVMBaseTx {
         "Buffer",
         "cb58"
       ),
-      importIns: this.importIns.map((i) => i.serialize(encoding))
+      importIns: this.importIns.map((i) => i.serialize(encoding)),
+      outs: this.outs.map((o) => o.serialize(encoding))
     }
   }
   deserialize(fields: object, encoding: SerializedEncoding = "hex") {
@@ -182,7 +183,7 @@ export class ImportTx extends EVMBaseTx {
    *
    * @returns An array of [[Credential]]s
    */
-  sign(msg: Buffer, kc: KeyChain): Credential[] {
+  sign(msg: Buffer, kc: SignerKeyChain): Credential[] {
     const creds: Credential[] = super.sign(msg, kc)
     this.importIns.forEach((importIn: TransferableInput) => {
       const cred: Credential = SelectCredentialClass(
@@ -190,7 +191,7 @@ export class ImportTx extends EVMBaseTx {
       )
       const sigidxs: SigIdx[] = importIn.getInput().getSigIdxs()
       sigidxs.forEach((sigidx: SigIdx) => {
-        const keypair: KeyPair = kc.getKey(sigidx.getSource())
+        const keypair: SignerKeyPair = kc.getKey(sigidx.getSource())
         const signval: Buffer = keypair.sign(msg)
         const sig: Signature = new Signature()
         sig.fromBuffer(signval)
diff --git a/src/apis/evm/outputs.ts b/src/apis/evm/outputs.ts
index da13f3d64..f28410139 100644
--- a/src/apis/evm/outputs.ts
+++ b/src/apis/evm/outputs.ts
@@ -11,11 +11,12 @@ import {
   StandardAmountOutput,
   StandardTransferableOutput
 } from "../../common/output"
-import { SerializedEncoding } from "../../utils/serialization"
+import { Serialization, SerializedEncoding } from "../../utils/serialization"
 import { EVMInput } from "./inputs"
 import { OutputIdError } from "../../utils/errors"
 
 const bintools: BinTools = BinTools.getInstance()
+const serializer = Serialization.getInstance()
 
 /**
  * Takes a buffer representing the output and returns the proper Output instance.
@@ -111,6 +112,19 @@ export class EVMOutput {
   protected amountValue: BN = new BN(0)
   protected assetID: Buffer = Buffer.alloc(32)
 
+  serialize(encoding: SerializedEncoding = "hex"): object {
+    return {
+      address: serializer.encoder(this.address, encoding, "Buffer", "hex"),
+      amount: serializer.encoder(
+        this.amount,
+        encoding,
+        "Buffer",
+        "decimalString"
+      ),
+      assetID: serializer.encoder(this.assetID, encoding, "Buffer", "cb58")
+    }
+  }
+
   /**
    * Returns a function used to sort an array of [[EVMOutput]]s
    */
diff --git a/src/apis/evm/tx.ts b/src/apis/evm/tx.ts
index 7d50dbc1b..938a337a5 100644
--- a/src/apis/evm/tx.ts
+++ b/src/apis/evm/tx.ts
@@ -7,12 +7,13 @@ import { Buffer } from "buffer/"
 import BinTools from "../../utils/bintools"
 import { EVMConstants } from "./constants"
 import { SelectCredentialClass } from "./credentials"
-import { KeyChain, KeyPair } from "./keychain"
 import {
   Credential,
   EVMStandardTx,
   EVMStandardUnsignedTx,
-  MultisigKeyChain
+  MultisigKeyChain,
+  SignerKeyChain,
+  SignerKeyPair
 } from "../../common"
 import createHash from "create-hash"
 import { EVMBaseTx } from "./basetx"
@@ -43,8 +44,8 @@ export const SelectTxClass = (txTypeID: number, ...args: any[]): EVMBaseTx => {
 }
 
 export class UnsignedTx extends EVMStandardUnsignedTx<
-  KeyPair,
-  KeyChain,
+  SignerKeyPair,
+  SignerKeyChain,
   EVMBaseTx
 > {
   protected _typeName = "UnsignedTx"
@@ -80,7 +81,7 @@ export class UnsignedTx extends EVMStandardUnsignedTx<
    *
    * @returns A signed [[StandardTx]]
    */
-  sign(kc: KeyChain): Tx {
+  sign(kc: SignerKeyChain): Tx {
     const txbuff: Buffer = this.toBuffer()
     const msg: Buffer = Buffer.from(
       createHash("sha256").update(txbuff).digest()
@@ -93,7 +94,11 @@ export class UnsignedTx extends EVMStandardUnsignedTx<
   }
 }
 
-export class Tx extends EVMStandardTx<KeyPair, KeyChain, UnsignedTx> {
+export class Tx extends EVMStandardTx<
+  SignerKeyPair,
+  SignerKeyChain,
+  UnsignedTx
+> {
   protected _typeName = "Tx"
   protected _typeID = undefined