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Legacy Account Key

AccountKeyLegacy

从 Web3j 和 kaia 库（web3j-ext）中导入必要的类。

从私人密钥创建证书

使用指定的 BAOBAB_URL 创建 Web3j 实例

此外，您还可以更改默认提供商。 例如，使用alchemy提供商。

燃气价格和gas 限值设置

从网络中获取链 ID

获取发件人地址的nonce值

生成新账户密钥用于账户更新

将交易类型设为 ACCOUNT_UPDATE

创建原始交易用于账户更新

签署交易

将签署的交易发送至 kaia 网络

等待交易完成并获取交易收据

关闭 Web3j 实例

解码原始交易以获取交易类型

AccountUpdateWithLegacyExample.java

package org.web3j.example.accountKey;

import org.web3j.tx.response.PollingTransactionReceiptProcessor;

import org.web3j.tx.response.TransactionReceiptProcessor;

import org.web3j.example.keySample;

import java.io.IOException;

import java.math.BigInteger;

import org.web3j.crypto.KlayCredentials;

import org.web3j.crypto.KlayRawTransaction;

import org.web3j.crypto.KlayTransactionEncoder;

import org.web3j.crypto.transaction.account.AccountKeyLegacy;

import org.web3j.crypto.transaction.type.TxType;

import org.web3j.crypto.transaction.type.TxTypeAccountUpdate;

import org.web3j.crypto.transaction.type.TxType.Type;

import org.web3j.protocol.core.DefaultBlockParameterName;

import org.web3j.protocol.core.methods.response.EthChainId;

import org.web3j.protocol.core.methods.response.EthSendTransaction;

import org.web3j.protocol.kaia.Web3j;

import org.web3j.protocol.http.HttpService;

import org.web3j.utils.Numeric;

import org.web3j.protocol.kaia.core.method.response.TransactionReceipt;

public class AccountUpdateWithLegacyExample {

public static void run() throws Exception {

KlayCredentials credentials = KlayCredentials.create(keySample.LEGACY_KEY_privkey);

Web3j web3j = Web3j.build(new HttpService(keySample.BAOBAB_URL));

BigInteger GAS_PRICE = BigInteger.valueOf(50000000000L);

BigInteger GAS_LIMIT = BigInteger.valueOf(6721950);

String from = credentials.getAddress();

EthChainId EthchainId = web3j.ethChainId().send();

long chainId = EthchainId.getChainId().longValue();

BigInteger nonce = web3j.ethGetTransactionCount(from, DefaultBlockParameterName.LATEST).send()

.getTransactionCount();

AccountKeyLegacy accountkey = AccountKeyLegacy.create();

TxType.Type type = Type.ACCOUNT_UPDATE;

KlayRawTransaction raw = KlayRawTransaction.createTransaction(

type,

nonce,

GAS_PRICE,

GAS_LIMIT,

from,

accountkey);

byte[] signedMessage = KlayTransactionEncoder.signMessage(raw, chainId, credentials);

String hexValue = Numeric.toHexString(signedMessage);

EthSendTransaction transactionResponse = web3j.ethSendRawTransaction(hexValue).send();

System.out.println("TxHash : \n " + transactionResponse.getResult());

String txHash = transactionResponse.getResult();

int DEFAULT_POLLING_ATTEMPTS_PER_TX_HASH = 40;

int DEFAULT_BLOCK_TIME = 1 * 1000;

long DEFAULT_POLLING_FREQUENCY = DEFAULT_BLOCK_TIME;

TransactionReceiptProcessor transactionReceiptProcessor = new PollingTransactionReceiptProcessor(web3j,

DEFAULT_POLLING_FREQUENCY, DEFAULT_POLLING_ATTEMPTS_PER_TX_HASH);

org.web3j.protocol.core.methods.response.TransactionReceipt ethReceipt = transactionReceiptProcessor

.waitForTransactionReceipt(txHash);

System.out.println("Receipt from eth_getTransactionReceipt : \n" + ethReceipt);

TransactionReceipt receipt = web3j.klayGetTransactionReceipt(txHash).send().getResult();

System.out.println("Receipt from klay_getTransactionReceipt : \n" + receipt);

web3j.shutdown();

TxTypeAccountUpdate rawTransaction = TxTypeAccountUpdate.decodeFromRawTransaction(signedMessage);

System.out.println("TxType : " + rawTransaction.getKlayType());

}

}

output

❯ java AccountUpdateWithLegacyExample.java

TxHash :

0x7b435e127119d8ee2edf8d49377ed150e4579cc3c991e0272a519a5d7f3f17b2

Receipt from eth_getTransactionReceipt :

TransactionReceipt{transactionHash='0x7b435e127119d8ee2edf8d49377ed150e4579cc3c991e0272a519a5d7f3f17b2', transactionIndex='0x1', blockHash='0xc1d491e001410664e0a1e68c20d69890a587dede6beae43c20fa1899935425ba', blockNumber='0x90e59b5', cumulativeGasUsed='0x3240d', gasUsed='0x5208', contractAddress='null', root='null', status='0x1', from='0xa2a8854b1802d8cd5de631e690817c253d6a9153', to='0xa2a8854b1802d8cd5de631e690817c253d6a9153', logs=[], logsBloom='0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000', revertReason='null', type='0x0', effectiveGasPrice='0x5d21dba00'}

Receipt from klay_getTransactionReceipt :

class TransactionReceipt {

blockHash: 0xc1d491e001410664e0a1e68c20d69890a587dede6beae43c20fa1899935425ba

blockNumber: 0x90e59b5

codeFormat: null

contractAddress: null

feePayer: null

feePayerSignatures: []

feeRatio: null

from: 0xa2a8854b1802d8cd5de631e690817c253d6a9153

gas: 0x66919e

effectiveGasPrice: 0x5d21dba00

gasPrice: 0xba43b7400

gasUsed: 0x5208

humanReadable: null

key: 0x01c0

input: null

logs: []

logsBloom: 0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

nonce: 0x3e8

senderTxHash: 0x7b435e127119d8ee2edf8d49377ed150e4579cc3c991e0272a519a5d7f3f17b2

signature: []

status: 0x1

txError: null

to: null

transactionHash: 0x7b435e127119d8ee2edf8d49377ed150e4579cc3c991e0272a519a5d7f3f17b2

transactionIndex: 0x1

type: TxTypeAccountUpdate

typeInt: 32

value: null

}

TxType : ACCOUNT_UPDATE