org.fisco.bcos.web3j.crypto.SignedRawTransaction Maven / Gradle / Ivy
package org.fisco.bcos.web3j.crypto;
import java.math.BigInteger;
import java.security.SignatureException;
public class SignedRawTransaction extends RawTransaction {
private static final int CHAIN_ID_INC = 35;
private static final int LOWER_REAL_V = 27;
private Sign.SignatureData signatureData;
public SignedRawTransaction(BigInteger randomid, BigInteger gasPrice,
BigInteger gasLimit, BigInteger blockLimit, String to, BigInteger value, String data,
Sign.SignatureData signatureData) {
super(randomid, gasPrice, gasLimit,blockLimit, to, value, data);
this.signatureData = signatureData;
}
public Sign.SignatureData getSignatureData() {
return signatureData;
}
public String getFrom() throws SignatureException {
Integer chainId = getChainId();
byte[] encodedTransaction;
if (null == chainId) {
encodedTransaction = TransactionEncoder.encode(this);
} else {
encodedTransaction = TransactionEncoder.encode(this, chainId.byteValue());
}
byte v = signatureData.getV();
byte[] r = signatureData.getR();
byte[] s = signatureData.getS();
Sign.SignatureData signatureDataV = new Sign.SignatureData(getRealV(v), r, s);
BigInteger key = Sign.signedMessageToKey(encodedTransaction, signatureDataV);
return "0x" + Keys.getAddress(key);
}
public void verify(String from) throws SignatureException {
String actualFrom = getFrom();
if (!actualFrom.equals(from)) {
throw new SignatureException("from mismatch");
}
}
private byte getRealV(byte v) {
if (v == LOWER_REAL_V || v == (LOWER_REAL_V + 1)) {
return v;
}
byte realV = LOWER_REAL_V;
int inc = 0;
if ((int) v % 2 == 0) {
inc = 1;
}
return (byte) (realV + inc);
}
public Integer getChainId() {
byte v = signatureData.getV();
if (v == LOWER_REAL_V || v == (LOWER_REAL_V + 1)) {
return null;
}
Integer chainId = (v - CHAIN_ID_INC) / 2;
return chainId;
}
}