Legacy

TxTypeLegacyTransaction represents a type of transactions existed previously in kaia.

This type of transaction can create an account, transfer tokens, deploy a smart contract, execute a smart contract, or perform a mix of aforementioned.

Import @kaiachain/viem-ext packages to add kaia features on web3

Set up a wallet client using createWalletClient, configured with the Kairos chain, an HTTP transport, and the sender’s private key converted to an account.

Create a transaction request for a legacy value transfer using prepareTransactionRequest, specifying the recipient address and the value to transfer (0 in this example).

Sign and send the legacy transaction to the Kaia blockchain using the wallet client’s sendTransaction method, and log the transaction hash.

txTypeLegacyTransaction.js


import { createWalletClient, http, kairos, privateKeyToAccount } from "@kaiachain/viem-ext";
const legacyWallet = createWalletClient({
  chain: kairos,
  transport: http(),
  account: privateKeyToAccount(
    "0x28d06bfebe5447d798ec7d1f208a045a15a1d6872b2a3cbb74cc896817bbb90d"
  ),
});
(async () => {
  // legacy tx
  const legacyRequest = await legacyWallet.prepareTransactionRequest({
    to: "0x70997970c51812dc3a010c7d01b50e0d17dc79c8",
    value: 0,
  });
  console.log("populated legacy request", legacyRequest);
  const sentLegacyTx = await legacyWallet.sendTransaction(legacyRequest);
  console.log("value transfer legacy tx", sentLegacyTx);
})();

output


❯ node txTypeLegacyTransaction.js
populated legacy request {
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 0,
  from: '0x7642e9D6F533DCd6F4c20EF7bA83141b6b210d83',
  nonce: 18,
  chainId: 1001,
  type: 'eip1559',
  maxPriorityFeePerGas: 0n,
  maxFeePerGas: 30000000000n,
  gas: 21000n
}
value transfer legacy tx 0x8da12ab374d592715df3bbf6cc96f11a836175daf0dec7f26295d172d6206056