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Public Account Key

AccountKeyPublic is used for accounts having one public key. If an account has an AccountKeyPublic object, the transaction validation process is done like below:

Import the @kaiachain/web3js-ext packages to add kaia features on web3

Define sender's address and private keys

Define receiver's address

Set up the provider with the specified kairos testnet URL. A provider in web3js is a read-only abstraction to access the blockchain data.

Also, you can change the provider URL from kairos to quicknode

Define a web3 instance using the provider

Create a sender's wallet with the private key and provider

Create a value transfer transaction with type: TxType.ValueTransfer

Sign the transaction with sender's wallet

Send the signed transaction to kaia network and print the receipt

Recover the address from signed transaction using web3.klay.recoverFromTransaction

SignTxWithPubkeyExample.js


const { Web3, TxType, toPeb } = require("@kaiachain/web3js-ext");
// Using senderPriv == senderNewPriv to execute this example repeatedly.
// But you might want to register a different private key.
const senderAddr = "0xfb60ded0ae96fe04eed6450aead860aa9d57128e";
const senderPriv = "0x0e4ca6d38096ad99324de0dde108587e5d7c600165ae4cd6c2462c597458c2b8";
const receiverAddr = "0xc40b6909eb7085590e1c26cb3becc25368e249e9";
const provider = new Web3.providers.HttpProvider("https://public-en-kairos.node.kaia.io");
const web3 = new Web3(provider);
const senderAccount = web3.eth.accounts.privateKeyToAccount(senderPriv);
async function main() {
  let tx = {
    type: TxType.ValueTransfer,
    to: receiverAddr,
    value: toPeb("0.01", "KLAY"),
    from: senderAddr,
  };
  const signResult = await senderAccount.signTransaction(tx);
  console.log("signedTx", signResult.transactionHash);
  const receipt = await web3.eth.sendSignedTransaction(signResult.rawTransaction);
  console.log("receipt", receipt);
  const sig = signResult.signature;
  const addr2 = await web3.klay.recoverFromTransaction(senderAddr, sig, "latest");
  console.log("recoveredAddr rpc", addr2, addr2.toLowerCase() === senderAddr);
}
main().catch(console.error);

output


❯ js SignTxWithPubkeyExample.js
rawTx 0x08f8868188850ba43b740082cd1494c40b6909eb7085590e1c26cb3becc25368e249e9872386f26fc1000094e15cd70a41dfb05e7214004d7d054801b2a2f06bf847f8458207f5a05e2299e8d947e8b39d3715ba3945535ad05da364ebc1fa168b3fea675cb27f60a05adf38401f83409216fd29aa6fb5b39f7113c0a49e2bb3e2003cb60baf2df7ac
sentTx 0x751ae9e74895cd899a51b5deab2d5e72103d06468cf1701d5925784808962d7e
receipt {
  to: '0xC40B6909EB7085590E1c26Cb3beCC25368e249E9',
  from: '0xe15Cd70A41dfb05e7214004d7D054801b2a2f06b',
  contractAddress: null,
  transactionIndex: 0,
  gasUsed: BigNumber { _hex: '0x5208', _isBigNumber: true },
  logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
  blockHash: '0xc61b3f87368b60e95e061e991f2a51a238240a7e10dd746192e9f640395661e9',
  transactionHash: '0x751ae9e74895cd899a51b5deab2d5e72103d06468cf1701d5925784808962d7e',
  logs: [],
  blockNumber: 152256785,
  confirmations: 3,
  cumulativeGasUsed: BigNumber { _hex: '0x5208', _isBigNumber: true },
  effectiveGasPrice: BigNumber { _hex: '0x05d21dba00', _isBigNumber: true },
  status: 1,
  type: 0,
  byzantium: true
}
recoveredAddr rpc 0xe15cd70a41dfb05e7214004d7d054801b2a2f06b true