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Value Transfer Memo

TxTypeValueTransferMemo is used when a user wants to send KAIA with a specific message.

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

Specify the kairos chain configuration to connect to the Kaia Kairos testnet.

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 value transfer using prepareTransactionRequest, specifying the sender’s account, recipient address, value to transfer (0 KLAY in this example), and transaction type (TxType.ValueTransfer).

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

TxTypeValueTransferMemo.js


import { createWalletClient, http, privateKeyToAccount, toHex, TxType } from "@kaiachain/viem-ext";
import { kairos } from "viem/chains";
const senderWallet = createWalletClient({
  chain: kairos,
  transport: http(),
  account: privateKeyToAccount(
    "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8"
  ),
});
// Example usage
(async () => {
  const txRequest = await senderWallet.prepareTransactionRequest({
    account: senderWallet.account,
    to: "0x70997970c51812dc3a010c7d01b50e0d17dc79c8",
    value: 0n,
    type: TxType.ValueTransferMemo,
    data: toHex('Hello Kaia')
  });
  console.log("txRequest", txRequest);
  const sentTx = await senderWallet.sendTransaction(txRequest);
  console.log("value transfer memo tx", sentTx);
  // account update
})();

output


❯ js TxTypeValueTransferMemo.js
txRequest {
  account: {
    address: '0xA2a8854b1802D8Cd5De631E690817c253d6a9153',
    nonceManager: undefined,
    sign: [AsyncFunction: sign],
    signAuthorization: [AsyncFunction: signAuthorization],
    signMessage: [AsyncFunction: signMessage],
    signTransaction: [AsyncFunction: signTransaction],
    signTypedData: [AsyncFunction: signTypedData],
    source: 'privateKey',
    type: 'local',
    publicKey: '0x04dc9dccbd788c00fa98f7f4082f2f714e799bc0c29d63f04d48b54fe6250453cdaf06ca34ae8714cf3dae06bacdb78c7c2d4054bd38961d40853cd5f15955da79'   
  },
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 0n,
  type: 8,
  from: '0xA2a8854b1802D8Cd5De631E690817c253d6a9153',
  nonce: 2376,
  chainId: 1001,
  gas: 21000n,
  gasPrice: '0x66720b300',
  gasLimit: 52500
}
value transfer memo tx 0x9a86e7ebf483b6a5ced2620f61ccda39e895419f6485a8ec2499d1104fd12314