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Add consensus branch ID parameter to SignatureHash, remove SigVersion parameter

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We do not need to be able to calculate multiple SignatureHash versions for a
single transaction format; instead, we use the transaction format to determine
the SigVersion.

The consensus branch ID *does* need to be passed in from the outside, as only
the caller knows the context in which the SignatureHash is being calculated
(ie. mempool acceptance vs. block validation).

JoinSplit signature verification has been moved into ContextualCheckTransaction,
where the consensus branch ID can be obtained.

The argument to the sign command for zcash-tx has been modified to take a height
in addition to the optional sigtype flags.
This commit is contained in:
Jack Grigg
2018-02-02 01:49:42 +00:00
parent 6514771a44
commit be12669982
26 changed files with 360 additions and 237 deletions
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10
src/rpcrawtransaction.cpp
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@@ -4,6 +4,7 @@
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "base58.h"
#include "consensus/upgrades.h"
#include "consensus/validation.h"
#include "core_io.h"
#include "init.h"
@@ -839,6 +840,9 @@ UniValue signrawtransaction(const UniValue& params, bool fHelp)
bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE);
// Grab the current consensus branch ID
auto consensusBranchId = CurrentEpochBranchId(chainActive.Height() + 1, Params().GetConsensus());
// Script verification errors
UniValue vErrors(UniValue::VARR);
@@ -859,17 +863,17 @@ UniValue signrawtransaction(const UniValue& params, bool fHelp)
SignatureData sigdata;
// Only sign SIGHASH_SINGLE if there's a corresponding output:
if (!fHashSingle || (i < mergedTx.vout.size()))
ProduceSignature(MutableTransactionSignatureCreator(&keystore, &mergedTx, i, amount, nHashType), prevPubKey, sigdata);
ProduceSignature(MutableTransactionSignatureCreator(&keystore, &mergedTx, i, amount, nHashType), prevPubKey, sigdata, consensusBranchId);
// ... and merge in other signatures:
BOOST_FOREACH(const CMutableTransaction& txv, txVariants) {
sigdata = CombineSignatures(prevPubKey, TransactionSignatureChecker(&txConst, i, amount), sigdata, DataFromTransaction(txv, i));
sigdata = CombineSignatures(prevPubKey, TransactionSignatureChecker(&txConst, i, amount), sigdata, DataFromTransaction(txv, i), consensusBranchId);
}
UpdateTransaction(mergedTx, i, sigdata);
ScriptError serror = SCRIPT_ERR_OK;
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, TransactionSignatureChecker(&txConst, i, amount), &serror)) {
if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, TransactionSignatureChecker(&txConst, i, amount), consensusBranchId, &serror)) {
TxInErrorToJSON(txin, vErrors, ScriptErrorString(serror));
}
}