bitcoin/libblkmaker
bitcoin/libblkmaker
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segwit: hash with witness nonce, null for now

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This commit is contained in:
Cory Fields 2016-01-23 22:48:40 -05:00
parent 22f6e42844
commit 15e2c35bf6
1 changed files with 9 additions and 1 deletions
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10
blkmaker.c
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@ -459,6 +459,7 @@ static const unsigned char witness_magic[] = { 0x6a /* OP_RETURN */, 0x24, 0xaa,
#define commitment_spk_size (sizeof(witness_magic) + sizeof(libblkmaker_hash_t) /* witness mrklroot */)
#define commitment_txout_size (8 /* value */ + 1 /* scriptPubKey length */ + commitment_spk_size)
static const size_t max_witness_commitment_insert = max_varint_size + commitment_txout_size - 1;
static const libblkmaker_hash_t witness_nonce = { 0 };
static
bool _blkmk_insert_witness_commitment(blktemplate_t * const tmpl, unsigned char * const gentxdata, size_t * const gentxsize) {
@ -469,6 +470,13 @@ bool _blkmk_insert_witness_commitment(blktemplate_t * const tmpl, unsigned char
// No commitment needed
return true;
}
libblkmaker_hash_t merkle_with_nonce[2];
libblkmaker_hash_t commitment;
memcpy(&merkle_with_nonce[0], tmpl->_witnessmrklroot, sizeof(*tmpl->_witnessmrklroot));
memcpy(&merkle_with_nonce[1], &witness_nonce, sizeof(witness_nonce));
if(!dblsha256(&commitment, &merkle_with_nonce[0], sizeof(merkle_with_nonce)))
return false;
if (cbScriptSigLen >= *gentxsize) {
return false;
@ -490,7 +498,7 @@ bool _blkmk_insert_witness_commitment(blktemplate_t * const tmpl, unsigned char
memset(commitment_txout, 0, 8); // value
commitment_txout[8] = commitment_spk_size;
memcpy(&commitment_txout[9], witness_magic, sizeof(witness_magic));
memcpy(&commitment_txout[9 + sizeof(witness_magic)], tmpl->_witnessmrklroot, sizeof(*tmpl->_witnessmrklroot));
memcpy(&commitment_txout[9 + sizeof(witness_magic)], &commitment, sizeof(commitment));
// TODO: Put the new txout at the end to reduce movement
const size_t offset_of_txout_data = (offset_of_txout_count + in_txout_count_size);