legacy

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TxTypeLegacyTransaction 代表 kaia 以前存在的一種事務類型。

**這種類型的交易可以創建賬戶、轉移代幣、部署智能合約、執行智能合約，或者執行上述交易的混合。

從 Web3j 和 kaia 庫（web3j-ext）中導入必要的類。

使用指定的 BAOBAB_URL 創建 Web3j 實例

使用私人密鑰創建新證書

燃氣價格和gas 限值設置

設置發送方的發件人地址和接收方的收件人地址

從網絡中獲取chain ID

從網絡上獲取用戶的nonce

定義要從發送方轉移到接收方的值

使用上述參數創建原始交易

對於 web3j-credentials，使用 KlayTransactionEncoder.signMessage 簽署事務，並使用 Numeric.toHexString 將其編碼為十六進制字符串。

使用 ethSendRawTransaction 方法將簽名交易發送到區塊鏈。

對於 web3j-ext klaycredentials，使用 KlayRawTransaction.createEtherTransaction 創建原始事務，使用 KlayTransactionEncoder.signMessage 簽名，並使用 Numeric.toHexString 編碼為十六進制字符串。

使用 ethSendRawTransaction 方法將簽名交易發送到區塊鏈。

獲取返回的收據哈希值。

最後，關閉 web3j 實例

txTypeLegacyTransaction.java

package org.web3j.example.transactions;

import java.io.IOException;

import java.math.BigInteger;

import org.web3j.crypto.Credentials;

import org.web3j.crypto.KlayCredentials;

import org.web3j.crypto.KlayRawTransaction;

import org.web3j.crypto.KlayTransactionEncoder;

import org.web3j.crypto.RawTransaction;

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.http.HttpService;

import org.web3j.protocol.kaia.Web3j;

import org.web3j.utils.Numeric;

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

import org.web3j.tx.response.PollingTransactionReceiptProcessor;

import org.web3j.tx.response.TransactionReceiptProcessor;

import org.web3j.example.keySample;

public class LegacyExample implements keySample {

/**

*

*/

public static void run() throws Exception {

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

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

Credentials credentials = Credentials.create(LEGACY_KEY_privkey);

BigInteger GAS_PRICE = BigInteger.valueOf(50000000000L);

BigInteger GAS_LIMIT = BigInteger.valueOf(6721950);

String from = credentials.getAddress();

String to = "0x000000000000000000000000000000000000dead";

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

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

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

.getTransactionCount();

BigInteger value = BigInteger.valueOf(100);

// send legacy transaction with web3j-credentials

RawTransaction raw = KlayRawTransaction.createEtherTransaction(

nonce,

GAS_PRICE,

GAS_LIMIT,

to,

value);

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

String hexValue = Numeric.toHexString(signedMessage);

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

System.out.println(transactionResponse.getResult());

// send legacy transaction with web3j-ext klaycredentials

raw = KlayRawTransaction.createEtherTransaction(

nonce,

GAS_PRICE,

GAS_LIMIT,

to,

value);

signedMessage = KlayTransactionEncoder.signMessage(raw, chainId, klaycredentials);

hexValue = Numeric.toHexString(signedMessage);

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();

}

}

output

❯ java txTypeLegacyTransaction.java

3.523785565427238379

0xa02e0i90faef4323cb542312de9aac0