Add DfTx TokenCreate

packages/jellyfish-transaction/__tests__/script/defi/dftx_token/TokenCreate.test.ts

@@ -0,0 +1,75 @@
+import { SmartBuffer } from 'smart-buffer'
+import { OP_DEFI_TX } from '../../../../src/script/defi'
+import { CTokenCreate, TokenCreate } from '../../../../src/script/defi/dftx_token'
+import { OP_CODES } from '../../../../src/script'
+import { toBuffer, toOPCodes } from '../../../../src/script/_buffer'
+import BigNumber from 'bignumber.js'
+
+/**
+ * using createToken sample from
+ * https://explorer.defichain.io/#/DFI/mainnet/tx/8a5066b4ea77c8d0b705ba94f47585f944ae587700f0f43f8655d01f38921f40
+ * https://explorer.defichain.io/#/DFI/mainnet/tx/baeddea27199a9e9001133f18942353dc79a765f0c437a1eda550f7675dc6b8b
+ * https://explorer.defichain.io/#/DFI/mainnet/tx/11fb90953bbd2a8f8649c116e6071dc73d428c5eba97c5a4a6dac550df2ab78c
+ */
+it('should bi-directional buffer-object-buffer', () => {
+  const fixtures = [
+    '6a1b44665478540342544307426974636f696e08000000000000000003',
+    '6a19446654785404474f4c4404476f6c6408000000000000000003',
+    '6a224466547854035753420e77616c6c7374726565746265747308000000000000000003',
+
+    // regtest fixtures
+    '6a174466547854034748490347484908000000000000000004',
+    '6a174466547854034a4b4c034a4b4c08000000000000000000',
+    '6a174466547854034d4e4f034d4e4f08000000000000000001',
+    '6a174466547854035051520350515208000000000000000007',
+    '6a174466547854034142430341424308000000000000000005'
+  ]
+
+  fixtures.forEach(hex => {
+    const stack: any = toOPCodes(
+      SmartBuffer.fromBuffer(Buffer.from(hex, 'hex'))
+    )
+    const buffer = toBuffer(stack)
+    expect(buffer.toString('hex')).toBe(hex)
+    expect((stack[1] as OP_DEFI_TX).tx.type).toBe(0x54)
+  })
+})
+
+const header = '6a224466547854' // OP_RETURN, PUSH_DATA(44665478, 54)
+const data = '035753420e77616c6c7374726565746265747308000000000000000003'
+const tokenCreate: TokenCreate = {
+  symbol: 'WSB',
+  name: 'wallstreetbets',
+  decimal: 8,
+  limit: new BigNumber('0'),
+  mintable: true,
+  tradeable: true,
+  isDAT: false
+}
+
+it('should craft dftx with OP_CODES._()', () => {
+  const stack = [
+    OP_CODES.OP_RETURN,
+    OP_CODES.OP_DEFI_TX_TOKEN_CREATE(tokenCreate)
+  ]
+
+  const buffer = toBuffer(stack)
+  expect(buffer.toString('hex')).toBe(header + data)
+})
+
+describe('Composable', () => {
+  it('should compose from buffer to composable', () => {
+    const buffer = SmartBuffer.fromBuffer(Buffer.from(data, 'hex'))
+    const composable = new CTokenCreate(buffer)
+
+    expect(composable.toObject()).toEqual(tokenCreate)
+  })
+
+  it('should compose from composable to buffer', () => {
+    const composable = new CTokenCreate(tokenCreate)
+    const buffer = new SmartBuffer()
+    composable.toBuffer(buffer)
+
+    expect(buffer.toBuffer().toString('hex')).toEqual(data)
+  })
+})

packages/jellyfish-transaction/src/buffer/buffer_bitmask.ts

@@ -0,0 +1,12 @@
+/**
+ * Extracts the "truthiness" of a bit given a position
+ * @param {number} binaryNum - The number to query from
+ * @param {number} position - This is the zero-indexed position of the bit from the right
+ * @returns {boolean} - "Truthiness" of the bit we're interested in
+ */
+export function getBitsFrom (binaryNum: number, position: number): boolean {
+  // Bit-shifts according to zero-indexed position
+  const mask = 1 << position
+  const query = binaryNum & mask
+  return Boolean(query)
+}

packages/jellyfish-transaction/src/buffer/buffer_composer.ts

@@ -1,6 +1,7 @@
 import BigNumber from 'bignumber.js'
 import { SmartBuffer } from 'smart-buffer'
 import { writeVarUInt, readVarUInt } from './buffer_varuint'
+import { getBitsFrom } from './buffer_bitmask'
 import { ONE_HUNDRED_MILLION, readBigNumberUInt64, writeBigNumberUInt64 } from './buffer_bignumber'
 
 export interface BufferComposer {
@@ -438,4 +439,25 @@ export abstract class ComposableBuffer<T> implements BufferComposer {
       }
     }
   }
+
+  static mask (
+    getter: () => boolean[],
+    setter: (data: boolean[]) => void
+  ): BufferComposer {
+    return {
+      fromBuffer: (buffer: SmartBuffer): void => {
+        const num = buffer.readInt8()
+        const array: boolean[] = []
+        for (let i = 0; i < getter().length; i += 1) {
+          array.unshift(getBitsFrom(num, i))
+        }
+        setter(array)
+      },
+      toBuffer: (buffer: SmartBuffer): void => {
+        const bools = getter().map(bool => bool.toString().toLowerCase() === 'true' ? 1 : 0)
+        const num = parseInt(bools.join(''), 2)
+        buffer.writeBuffer(Buffer.from([num]))
+      }
+    }
+  }
 }

packages/jellyfish-transaction/src/script/defi/dftx.ts

@@ -14,7 +14,7 @@ import {
   CPoolAddLiquidity, CPoolRemoveLiquidity, CPoolSwap, PoolAddLiquidity, PoolRemoveLiquidity,
   PoolSwap
 } from './dftx_pool'
-import { CTokenMint, TokenMint } from './dftx_token'
+import { CTokenCreate, CTokenMint, TokenCreate, TokenMint } from './dftx_token'
 import { CDeFiOpUnmapped, DeFiOpUnmapped } from './dftx_unmapped'
 
 // Disabling no-return-assign makes the code cleaner with the setter and getter */
@@ -100,6 +100,8 @@ export class CDfTx extends ComposableBuffer<DfTx<any>> {
         return compose<PoolRemoveLiquidity>(CPoolRemoveLiquidity.OP_NAME, d => new CPoolRemoveLiquidity(d))
       case CTokenMint.OP_CODE:
         return compose<TokenMint>(CTokenMint.OP_NAME, d => new CTokenMint(d))
+      case CTokenCreate.OP_CODE:
+        return compose<TokenCreate>(CTokenCreate.OP_NAME, d => new CTokenCreate(d))
       case CUtxosToAccount.OP_CODE:
         return compose<UtxosToAccount>(CUtxosToAccount.OP_NAME, d => new CUtxosToAccount(d))
       case CAccountToUtxos.OP_CODE:

packages/jellyfish-transaction/src/script/defi/dftx_token.ts

@@ -1,5 +1,6 @@
 import { BufferComposer, ComposableBuffer } from '../../buffer/buffer_composer'
 import { TokenBalance, CTokenBalance } from './dftx_balance'
+import BigNumber from 'bignumber.js'
 
 // Disabling no-return-assign makes the code cleaner with the setter and getter */
 /* eslint-disable no-return-assign */
@@ -25,3 +26,39 @@ export class CTokenMint extends ComposableBuffer<TokenMint> {
     ]
   }
 }
+
+/**
+ * TokenCreate DeFi Transaction
+ */
+export interface TokenCreate {
+  symbol: string // ---------------------| VarUInt{1-9 bytes}, + n bytes
+  name: string // -----------------------| VarUInt{1-9 bytes}, + n bytes
+  decimal: number // --------------------| 1 byte
+  limit: BigNumber // -------------------| 64 bytes
+  isDAT: boolean // ---------------------| 1 byte
+  tradeable: boolean // -----------------| 1 byte
+  mintable: boolean // ------------------| 1 byte
+}
+
+/**
+ * Composable TokenMint, C stands for Composable.
+ * Immutable by design, bi-directional fromBuffer, toBuffer deep composer.
+ */
+export class CTokenCreate extends ComposableBuffer<TokenCreate> {
+  static OP_CODE = 0x54 /// 'T'
+  static OP_NAME = 'DEFI_OP_TOKEN_CREATE'
+
+  composers (tc: TokenCreate): BufferComposer[] {
+    return [
+      ComposableBuffer.varUIntUtf8BE(() => tc.symbol, v => tc.symbol = v),
+      ComposableBuffer.varUIntUtf8BE(() => tc.name, v => tc.name = v),
+      ComposableBuffer.uInt8(() => tc.decimal, v => tc.decimal = v),
+      ComposableBuffer.bigNumberUInt64(() => tc.limit, v => tc.limit = v),
+      ComposableBuffer.mask(() => [tc.isDAT, tc.tradeable, tc.mintable], v => {
+        tc.isDAT = v[0]
+        tc.tradeable = v[1]
+        tc.mintable = v[2]
+      })
+    ]
+  }
+}

packages/jellyfish-transaction/src/script/mapping.ts

@@ -18,7 +18,7 @@ import {
   PoolRemoveLiquidity,
   PoolSwap
 } from './defi/dftx_pool'
-import { CTokenMint, TokenMint } from './defi/dftx_token'
+import { CTokenCreate, CTokenMint, TokenCreate, TokenMint } from './defi/dftx_token'
 import {
   AccountToAccount,
   AccountToUtxos,
@@ -150,6 +150,14 @@ export const OP_CODES = {
       data: tokenMint
     })
   },
+  OP_DEFI_TX_TOKEN_CREATE: (tokenCreate: TokenCreate): OP_DEFI_TX => {
+    return new OP_DEFI_TX({
+      signature: CDfTx.SIGNATURE,
+      type: CTokenCreate.OP_CODE,
+      name: CTokenCreate.OP_NAME,
+      data: tokenCreate
+    })
+  },
   OP_DEFI_TX_UTXOS_TO_ACCOUNT: (utxosToAccount: UtxosToAccount): OP_DEFI_TX => {
     return new OP_DEFI_TX({
       signature: CDfTx.SIGNATURE,