fix: add bridged HRC20 mint API

src/bridge/bridgedHrc20Token/index.ts

@@ -39,6 +39,10 @@ export class BridgedHRC20Token extends EthBaseContract {
     return this.write('transferFrom', [from, to, amount], txOptions)
   }
 
+  public async mint(account: string, amount: BigNumberish, txOptions?: CallOverrides): Promise<TransactionReceipt> {
+    return this.write('mint', [account, amount], txOptions)
+  }
+
   public async symbol(): Promise<string> {
     return this.read<string>('symbol')
   }

src/tests/bridged-hrc20-token.spec.ts

@@ -0,0 +1,35 @@
+import { Wallet } from '@ethersproject/wallet'
+import { expect } from 'chai'
+import sinon from 'sinon'
+import { BridgedHRC20Token } from '../bridge'
+
+const CONTRACT_ADDRESS = '0x0000000000000000000000000000000000000001'
+const PRIVATE_KEY = '0x0123456789012345678901234567890123456789012345678901234567890123'
+const ACCOUNT = '0x0000000000000000000000000000000000000002'
+const AMOUNT = '1000000000000000000'
+const TX_OPTIONS = { gasLimit: 21000 }
+const TX_RECEIPT = { transactionHash: '0xfakeHash' } as any
+
+describe('BridgedHRC20Token', () => {
+  let token: BridgedHRC20Token
+
+  beforeEach(() => {
+    token = new BridgedHRC20Token(CONTRACT_ADDRESS, new Wallet(PRIVATE_KEY))
+  })
+
+  afterEach(() => {
+    sinon.restore()
+  })
+
+  describe('mint', () => {
+    it('should mint the provided amount to the account', async () => {
+      const stub = sinon.stub(token, 'write')
+      stub.withArgs('mint', [ACCOUNT, AMOUNT], TX_OPTIONS).resolves(TX_RECEIPT)
+
+      const receipt = await token.mint(ACCOUNT, AMOUNT, TX_OPTIONS)
+
+      expect(stub.calledOnce).to.be.true
+      expect(receipt).to.equal(TX_RECEIPT)
+    })
+  })
+})