feat(sdk-coin-canton): added transfer acceptance builder

modules/sdk-coin-canton/src/lib/iface.ts

@@ -57,9 +57,8 @@ export interface WalletInitRequest {
   observingParticipantUids: string[];
 }
 
-export interface OneStepEnablementRequest {
+export interface CantonPrepareCommandRequest {
   commandId: string;
-  receiverId: string;
   verboseHashing: boolean;
   actAs: string[];
   readAs: string[];
@@ -81,3 +80,11 @@ export interface WalletInitBroadcastData {
   onboardingTransactions: OnboardingTransaction[];
   multiHashSignatures: MultiHashSignature[];
 }
+
+export interface CantonOneStepEnablementRequest extends CantonPrepareCommandRequest {
+  receiverId: string;
+}
+
+export interface CantonTransferAcceptRequest extends CantonPrepareCommandRequest {
+  contractId: string;
+}

modules/sdk-coin-canton/src/lib/index.ts

@@ -2,7 +2,9 @@ import * as Utils from './utils';
 import * as Interface from './iface';
 
 export { KeyPair } from './keyPair';
+export { OneStepPreApprovalBuilder } from './oneStepPreApprovalBuilder';
 export { Transaction } from './transaction/transaction';
+export { TransferAcceptanceBuilder } from './transferAcceptanceBuilder';
 export { TransactionBuilder } from './transactionBuilder';
 export { TransactionBuilderFactory } from './transactionBuilderFactory';
 export { WalletInitBuilder } from './walletInitBuilder';

modules/sdk-coin-canton/src/lib/oneStepPreApprovalBuilder.ts

@@ -1,6 +1,6 @@
 import { TransactionType } from '@bitgo/sdk-core';
 import { BaseCoin as CoinConfig } from '@bitgo/statics';
-import { CantonPrepareCommandResponse, OneStepEnablementRequest } from './iface';
+import { CantonPrepareCommandResponse, CantonOneStepEnablementRequest } from './iface';
 import { TransactionBuilder } from './transactionBuilder';
 import { Transaction } from './transaction/transaction';
 
@@ -62,15 +62,15 @@ export class OneStepPreApprovalBuilder extends TransactionBuilder {
   }
 
   /**
-   * Builds and returns the OneStepEnablementRequest object from the builder's internal state.
+   * Builds and returns the CantonOneStepEnablementRequest object from the builder's internal state.
    *
    * This method performs validation before constructing the object. If required fields are
    * missing or invalid, it throws an error.
    *
-   * @returns {OneStepEnablementRequest} - A fully constructed and validated request object for 1-step enablement.
+   * @returns {CantonOneStepEnablementRequest} - A fully constructed and validated request object for 1-step enablement.
    * @throws {Error} If any required field is missing or fails validation.
    */
-  toRequestObject(): OneStepEnablementRequest {
+  toRequestObject(): CantonOneStepEnablementRequest {
     this.validate();
 
     return {

modules/sdk-coin-canton/src/lib/transactionBuilderFactory.ts

@@ -5,6 +5,7 @@ import {
   TransactionType,
 } from '@bitgo/sdk-core';
 import { BaseCoin as CoinConfig } from '@bitgo/statics';
+import { TransferAcceptanceBuilder } from './transferAcceptanceBuilder';
 import { TransactionBuilder } from './transactionBuilder';
 import { TransferBuilder } from './transferBuilder';
 import { Transaction } from './transaction/transaction';
@@ -24,13 +25,25 @@ export class TransactionBuilderFactory extends BaseTransactionBuilderFactory {
     } catch {
       const tx = new Transaction(this._coinConfig);
       tx.fromRawTransaction(raw);
-      if (tx.type === TransactionType.Send) {
-        return this.getTransferBuilder(tx);
+      switch (tx.type) {
+        case TransactionType.Send: {
+          return this.getTransferBuilder(tx);
+        }
+        case TransactionType.TransferAccept: {
+          return this.getTransferAcceptanceBuilder(tx);
+        }
+        default: {
+          throw new InvalidTransactionError('unsupported transaction');
+        }
       }
-      throw new InvalidTransactionError('unsupported transaction');
     }
   }
 
+  /** @inheritdoc */
+  getTransferAcceptanceBuilder(tx?: Transaction): TransferAcceptanceBuilder {
+    return TransactionBuilderFactory.initializeBuilder(tx, new TransferAcceptanceBuilder(this._coinConfig));
+  }
+
   /** @inheritdoc */
   getTransferBuilder(tx?: Transaction): TransferBuilder {
     return TransactionBuilderFactory.initializeBuilder(tx, new TransferBuilder(this._coinConfig));

modules/sdk-coin-canton/src/lib/transferAcceptanceBuilder.ts

@@ -0,0 +1,111 @@
+import { TransactionType } from '@bitgo/sdk-core';
+import { BaseCoin as CoinConfig } from '@bitgo/statics';
+import { CantonPrepareCommandResponse, CantonTransferAcceptRequest } from './iface';
+import { TransactionBuilder } from './transactionBuilder';
+import { Transaction } from './transaction/transaction';
+
+export class TransferAcceptanceBuilder extends TransactionBuilder {
+  private _commandId: string;
+  private _contractId: string;
+  private _actAsPartyId: string;
+  constructor(_coinConfig: Readonly<CoinConfig>) {
+    super(_coinConfig);
+  }
+
+  initBuilder(tx: Transaction): void {
+    super.initBuilder(tx);
+    this.setTransactionType();
+  }
+
+  get transactionType(): TransactionType {
+    return TransactionType.TransferAccept;
+  }
+
+  setTransactionType(): void {
+    this.transaction.transactionType = TransactionType.TransferAccept;
+  }
+
+  setTransaction(transaction: CantonPrepareCommandResponse): void {
+    this.transaction.prepareCommand = transaction;
+  }
+
+  /**
+   * Sets the unique id for the transfer acceptance
+   * Also sets the _id of the transaction
+   *
+   * @param id - A uuid
+   * @returns The current builder instance for chaining.
+   * @throws Error if id is empty.
+   */
+  commandId(id: string): this {
+    if (!id.trim()) {
+      throw new Error('commandId must be a non-empty string');
+    }
+    this._commandId = id.trim();
+    // also set the transaction _id
+    this.transaction.id = id.trim();
+    return this;
+  }
+
+  /**
+   * Sets the acceptance contract id the receiver needs to accept
+   * @param id - canton acceptance contract id
+   * @returns The current builder instance for chaining.
+   * @throws Error if id is empty.
+   */
+  contractId(id: string): this {
+    if (!id.trim()) {
+      throw new Error('contractId must be a non-empty string');
+    }
+    this._contractId = id.trim();
+    return this;
+  }
+
+  /**
+   * Sets the receiver of the acceptance
+   *
+   * @param id - the receiver party id (address)
+   * @returns The current builder instance for chaining.
+   * @throws Error if id is empty.
+   */
+  actAs(id: string): this {
+    if (!id.trim()) {
+      throw new Error('actAsPartyId must be a non-empty string');
+    }
+    this._actAsPartyId = id.trim();
+    return this;
+  }
+
+  /**
+   * Builds and returns the CantonTransferAcceptRequest object from the builder's internal state.
+   *
+   * This method performs validation before constructing the object. If required fields are
+   * missing or invalid, it throws an error.
+   *
+   * @returns {CantonTransferAcceptRequest} - A fully constructed and validated request object for transfer acceptance.
+   * @throws {Error} If any required field is missing or fails validation.
+   */
+  toRequestObject(): CantonTransferAcceptRequest {
+    this.validate();
+
+    return {
+      commandId: this._commandId,
+      contractId: this._contractId,
+      verboseHashing: false,
+      actAs: [this._actAsPartyId],
+      readAs: [],
+    };
+  }
+
+  /**
+   * Validates the internal state of the builder before building the request object.
+   *
+   * @private
+   * @throws {Error} If any required field is missing or invalid.
+   */
+  private validate(): void {
+    if (!this._commandId) throw new Error('commandId is missing');
+    if (!this._contractId) throw new Error('contractId is missing');
+    if (!this._actAsPartyId) throw new Error('receiver partyId is missing');
+  }
+}

modules/sdk-coin-canton/test/unit/builder/oneStepEnablement/oneStepEnablementBuilder.ts

@@ -4,7 +4,7 @@ import should from 'should';
 import { coins } from '@bitgo/statics';
 
 import { Transaction } from '../../../../src';
-import { OneStepEnablementRequest } from '../../../../src/lib/iface';
+import { CantonOneStepEnablementRequest } from '../../../../src/lib/iface';
 import { OneStepPreApprovalBuilder } from '../../../../src/lib/oneStepPreApprovalBuilder';
 
 import {
@@ -14,13 +14,13 @@ import {
 } from '../../../resources';
 
 describe('Wallet Pre-approval Enablement Builder', () => {
-  it('should get the wallet init request object', function () {
+  it('should get the one step enablement request object', function () {
     const txBuilder = new OneStepPreApprovalBuilder(coins.get('tcanton'));
     const oneStepEnablementTx = new Transaction(coins.get('tcanton'));
     txBuilder.initBuilder(oneStepEnablementTx);
     const { commandId, partyId } = OneStepEnablement;
     txBuilder.commandId(commandId).receiverPartyId(partyId);
-    const requestObj: OneStepEnablementRequest = txBuilder.toRequestObject();
+    const requestObj: CantonOneStepEnablementRequest = txBuilder.toRequestObject();
     should.exist(requestObj);
     assert.equal(requestObj.commandId, commandId);
     assert.equal(requestObj.receiverId, partyId);

modules/sdk-coin-canton/test/unit/builder/transferAccept/transferAcceptBuilder.ts

@@ -0,0 +1,71 @@
+import assert from 'assert';
+import should from 'should';
+
+import { coins } from '@bitgo/statics';
+
+import { TransferAcceptanceBuilder, Transaction } from '../../../../src';
+import { CantonTransferAcceptRequest } from '../../../../src/lib/iface';
+
+import { TransferAcceptance, TransferAcceptancePrepareResponse } from '../../../resources';
+
+describe('Transfer Acceptance Builder', () => {
+  it('should get the transfer acceptance request object', function () {
+    const txBuilder = new TransferAcceptanceBuilder(coins.get('tcanton'));
+    const transferAcceptanceTx = new Transaction(coins.get('tcanton'));
+    txBuilder.initBuilder(transferAcceptanceTx);
+    const { commandId, contractId, partyId } = TransferAcceptance;
+    txBuilder.commandId(commandId).contractId(contractId).actAs(partyId);
+    const requestObj: CantonTransferAcceptRequest = txBuilder.toRequestObject();
+    should.exist(requestObj);
+    assert.equal(requestObj.commandId, commandId);
+    assert.equal(requestObj.contractId, contractId);
+    assert.equal(requestObj.actAs.length, 1);
+    const actAs = requestObj.actAs[0];
+    assert.equal(actAs, partyId);
+  });
+
+  it('should validate raw transaction', function () {
+    const txBuilder = new TransferAcceptanceBuilder(coins.get('tcanton'));
+    const transferAcceptanceTx = new Transaction(coins.get('tcanton'));
+    txBuilder.initBuilder(transferAcceptanceTx);
+    txBuilder.setTransaction(TransferAcceptancePrepareResponse);
+    txBuilder.validateRawTransaction(TransferAcceptancePrepareResponse.preparedTransaction);
+  });
+
+  it('should validate the transaction', function () {
+    const txBuilder = new TransferAcceptanceBuilder(coins.get('tcanton'));
+    const transferAcceptanceTx = new Transaction(coins.get('tcanton'));
+    transferAcceptanceTx.prepareCommand = TransferAcceptancePrepareResponse;
+    txBuilder.initBuilder(transferAcceptanceTx);
+    txBuilder.setTransaction(TransferAcceptancePrepareResponse);
+    txBuilder.validateTransaction(transferAcceptanceTx);
+  });
+
+  it('should throw error in validating raw transaction', function () {
+    const txBuilder = new TransferAcceptanceBuilder(coins.get('tcanton'));
+    const transferAcceptanceTx = new Transaction(coins.get('tcanton'));
+    txBuilder.initBuilder(transferAcceptanceTx);
+    const invalidPrepareResponse = TransferAcceptancePrepareResponse;
+    invalidPrepareResponse.preparedTransactionHash = '+vlIXv6Vgd2ypPXD0mrdn7RlcSH4c2hCRj2/tXqqUVs=';
+    txBuilder.setTransaction(invalidPrepareResponse);
+    try {
+      txBuilder.validateRawTransaction(invalidPrepareResponse.preparedTransaction);
+    } catch (e) {
+      assert.equal(e.message, 'invalid raw transaction, hash not matching');
+    }
+  });
+
+  it('should throw error in validating raw transaction', function () {
+    const txBuilder = new TransferAcceptanceBuilder(coins.get('tcanton'));
+    const oneStepEnablementTx = new Transaction(coins.get('tcanton'));
+    txBuilder.initBuilder(oneStepEnablementTx);
+    const invalidPrepareResponse = TransferAcceptancePrepareResponse;
+    invalidPrepareResponse.preparedTransactionHash = '+vlIXv6Vgd2ypPXD0mrdn7RlcSH4c2hCRj2/tXqqUVs=';
+    oneStepEnablementTx.prepareCommand = invalidPrepareResponse;
+    try {
+      txBuilder.validateTransaction(oneStepEnablementTx);
+    } catch (e) {
+      assert.equal(e.message, 'invalid transaction');
+    }
+  });
+});

modules/sdk-core/src/account-lib/baseCoin/enum.ts

@@ -89,6 +89,8 @@ export enum TransactionType {
   FlushERC1155,
   // Set up 1-step pre-approval for canton
   OneStepPreApproval,
+  // canton transfer accept, 2-step
+  TransferAccept,
 
   // trx
   FREEZE,