feat(sdk-coin-canton): added wallet initialize builder to the builder factory

Ticket: COIN-6080

Author: ravibitgo

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

@@ -1,6 +1,8 @@
-import { BaseTransactionBuilderFactory } from '@bitgo/sdk-core';
+import { BaseTransaction, BaseTransactionBuilderFactory } from '@bitgo/sdk-core';
 import { TransactionBuilder } from './transactionBuilder';
 import { TransferBuilder } from './transferBuilder';
+import { WalletInitBuilder } from './walletInitBuilder';
+import { WalletInitTransaction } from './walletInitialization/walletInitTransaction';
 
 export class TransactionBuilderFactory extends BaseTransactionBuilderFactory {
   /** @inheritdoc */
@@ -14,7 +16,17 @@ export class TransactionBuilderFactory extends BaseTransactionBuilderFactory {
   }
 
   /** @inheritdoc */
-  getWalletInitializationBuilder(): void {
-    throw new Error('Method not implemented.');
+  getWalletInitializationBuilder(tx?: WalletInitTransaction): WalletInitBuilder {
+    return TransactionBuilderFactory.initializeBuilder(tx, new WalletInitBuilder(this._coinConfig));
+  }
+
+  private static initializeBuilder<TTx extends BaseTransaction, TBuilder extends { initBuilder(tx: TTx): void }>(
+    tx: TTx | undefined,
+    builder: TBuilder
+  ): TBuilder {
+    if (tx) {
+      builder.initBuilder(tx);
+    }
+    return builder;
   }
 }