How are you doing the hashing?
are you SHA256 hashing twice?
are you SHA256 hashing twice?
Here's my Java code. This calculation does not work for P2SH transactions. This affects multisignature address with the 3 at the beginning.
To fix the method, I need a reference. So I need to know what's right. Hence my questions here.
Code:
public byte[] getSigHash(byte[] pkScript, byte[] valueRaw, int txIndex) throws Exception
{
if(isWitness)
{
byte[][] txPrev = getTxPrevHashNoSwap();
byte[][] prevIndex = getTxPrevIndexByte();
ByteArrayList list = new ByteArrayList(new byte[0]);
for(int i=0; i
list.add(txPrev[i]);
list.add(prevIndex[i]);
}
byte[] nVersion = getVersion_byte();
byte[] hashPrevouts = Calc.getHashSHA256(Calc.getHashSHA256(list.getArrayAll()));
list = new ByteArrayList(new byte[0]);
for(int i=0; i
list = new ByteArrayList(new byte[0]);
list.add(txPrev[txIndex]); list.add(prevIndex[txIndex]);
byte[] outpoint = list.getArrayAll();
PkScript pk = new PkScript(pkScript);
byte[] b = {0x19,0x76,(byte)0xa9,0x14};
list = new ByteArrayList(b);
list.add(pk.getHash160());
list.add((byte) 0x88); list.add((byte) 0xac);
byte[] scriptCode = list.getArrayAll();
byte[] amount = valueRaw;
byte[] nSequence = getSequence()[txIndex];
byte[] hashOutputs = new byte[witness_pos-value_pos[0]];
System.arraycopy(data, value_pos[0], hashOutputs, 0, hashOutputs.length);
hashOutputs = Calc.getHashSHA256(Calc.getHashSHA256(hashOutputs));
byte[] nLockTime = getLockTime();
byte[] nHashType = {1,0,0,0};
list = new ByteArrayList(nVersion);
list.add(hashPrevouts);
list.add(hashSequence);
list.add(outpoint);
list.add(scriptCode);
list.add(amount);
list.add(nSequence);
list.add(hashOutputs);
list.add(nLockTime);
list.add(nHashType);
return Calc.getHashSHA256(Calc.getHashSHA256(list.getArrayAll()));
}
else
{
ByteArrayList list = new ByteArrayList(data);
for(int i=txIn_count-1; i>=0;i--)
{
int pos = sigScript_pos[i]-1;
list.remove(pos, pos + sigScript_len[i]+1);
if(i==txIndex)
{
list.insert(pkScript, pos);
list.insert((byte)pkScript.length,pos);
}
else list.insert((byte)0x00, pos);
}
byte[] b = {0x01, 0x00, 0x00, 0x00};
list.add(b);
byte[] uSigTx = list.getArrayAll();
return Calc.getHashSHA256(Calc.getHashSHA256(uSigTx));
}
}
{
if(isWitness)
{
byte[][] txPrev = getTxPrevHashNoSwap();
byte[][] prevIndex = getTxPrevIndexByte();
ByteArrayList list = new ByteArrayList(new byte[0]);
for(int i=0; i
list.add(txPrev[i]);
list.add(prevIndex[i]);
}
byte[] nVersion = getVersion_byte();
byte[] hashPrevouts = Calc.getHashSHA256(Calc.getHashSHA256(list.getArrayAll()));
list = new ByteArrayList(new byte[0]);
for(int i=0; i
list = new ByteArrayList(new byte[0]);
list.add(txPrev[txIndex]); list.add(prevIndex[txIndex]);
byte[] outpoint = list.getArrayAll();
PkScript pk = new PkScript(pkScript);
byte[] b = {0x19,0x76,(byte)0xa9,0x14};
list = new ByteArrayList(b);
list.add(pk.getHash160());
list.add((byte) 0x88); list.add((byte) 0xac);
byte[] scriptCode = list.getArrayAll();
byte[] amount = valueRaw;
byte[] nSequence = getSequence()[txIndex];
byte[] hashOutputs = new byte[witness_pos-value_pos[0]];
System.arraycopy(data, value_pos[0], hashOutputs, 0, hashOutputs.length);
hashOutputs = Calc.getHashSHA256(Calc.getHashSHA256(hashOutputs));
byte[] nLockTime = getLockTime();
byte[] nHashType = {1,0,0,0};
list = new ByteArrayList(nVersion);
list.add(hashPrevouts);
list.add(hashSequence);
list.add(outpoint);
list.add(scriptCode);
list.add(amount);
list.add(nSequence);
list.add(hashOutputs);
list.add(nLockTime);
list.add(nHashType);
return Calc.getHashSHA256(Calc.getHashSHA256(list.getArrayAll()));
}
else
{
ByteArrayList list = new ByteArrayList(data);
for(int i=txIn_count-1; i>=0;i--)
{
int pos = sigScript_pos[i]-1;
list.remove(pos, pos + sigScript_len[i]+1);
if(i==txIndex)
{
list.insert(pkScript, pos);
list.insert((byte)pkScript.length,pos);
}
else list.insert((byte)0x00, pos);
}
byte[] b = {0x01, 0x00, 0x00, 0x00};
list.add(b);
byte[] uSigTx = list.getArrayAll();
return Calc.getHashSHA256(Calc.getHashSHA256(uSigTx));
}
}