import {
  createWalletClient,
  Hex,
  http,
  WalletClient,
  type Account,
  type HttpTransport,
} from "viem"
import { privateKeyToAccount } from "viem/accounts"
import {
  TransactionSender,
  TransactionSenderResponse,
  type TransactionSenderRequest,
} from "./TransactionSender"
import { getChainById } from "./chains"

export default class LocalTransactionSender implements TransactionSender {
  readonly #walletClient: WalletClient<HttpTransport, undefined, Account>

  constructor(relayerPrivateKey: Hex) {
    const transport = http("http://localhost:8545")
    const account = privateKeyToAccount(relayerPrivateKey)

    this.#walletClient = createWalletClient({
      account,
      transport,
    })
  }

  async sendTransaction(
    tx: TransactionSenderRequest,
  ): Promise<TransactionSenderResponse> {
    const hash = await this.#walletClient.sendTransaction({
      to: tx.to,
      data: tx.data,
      chain: getChainById(tx.chainId),
    })
    return { hash }
  }
}