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Use P2SH consensus rules for all blocks

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This commit moves P2SH activation back to the genesis block, with
a hardcoded exception for the one historical block in the chain that
violated this rule.
This commit is contained in:
Suhas Daftuar 2017-09-12 11:38:20 -04:00 committed by Suhas Daftuar
parent 94deb09349
commit ce650182f4
3 changed files with 14 additions and 7 deletions
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6
src/chainparams.cpp
View File

@ -75,7 +75,7 @@ public:
CMainParams() {
strNetworkID = "main";
consensus.nSubsidyHalvingInterval = 210000;
consensus.BIP16Height = 173805; // 00000000000000ce80a7e057163a4db1d5ad7b20fb6f598c9597b9665c8fb0d4 - April 1, 2012
consensus.BIP16Exception = uint256S("0x00000000000002dc756eebf4f49723ed8d30cc28a5f108eb94b1ba88ac4f9c22");
consensus.BIP34Height = 227931;
consensus.BIP34Hash = uint256S("0x000000000000024b89b42a942fe0d9fea3bb44ab7bd1b19115dd6a759c0808b8");
consensus.BIP65Height = 388381; // 000000000000000004c2b624ed5d7756c508d90fd0da2c7c679febfa6c4735f0
@ -190,7 +190,7 @@ public:
CTestNetParams() {
strNetworkID = "test";
consensus.nSubsidyHalvingInterval = 210000;
consensus.BIP16Height = 514; // 00000000040b4e986385315e14bee30ad876d8b47f748025b26683116d21aa65
consensus.BIP16Exception = uint256S("0x00000000dd30457c001f4095d208cc1296b0eed002427aa599874af7a432b105");
consensus.BIP34Height = 21111;
consensus.BIP34Hash = uint256S("0x0000000023b3a96d3484e5abb3755c413e7d41500f8e2a5c3f0dd01299cd8ef8");
consensus.BIP65Height = 581885; // 00000000007f6655f22f98e72ed80d8b06dc761d5da09df0fa1dc4be4f861eb6
@ -283,7 +283,7 @@ public:
CRegTestParams() {
strNetworkID = "regtest";
consensus.nSubsidyHalvingInterval = 150;
consensus.BIP16Height = 0; // always enforce P2SH BIP16 on regtest
consensus.BIP16Exception = uint256();
consensus.BIP34Height = 100000000; // BIP34 has not activated on regtest (far in the future so block v1 are not rejected in tests)
consensus.BIP34Hash = uint256();
consensus.BIP65Height = 1351; // BIP65 activated on regtest (Used in rpc activation tests)

4
src/consensus/params.h
View File

@ -49,8 +49,8 @@ struct BIP9Deployment {
struct Params {
uint256 hashGenesisBlock;
int nSubsidyHalvingInterval;
/** Block height at which BIP16 becomes active */
int BIP16Height;
/* Block hash that is excepted from BIP16 enforcement */
uint256 BIP16Exception;
/** Block height and hash at which BIP34 becomes active */
int BIP34Height;
uint256 BIP34Hash;

11
src/validation.cpp
View File

@ -1730,8 +1730,15 @@ static unsigned int GetBlockScriptFlags(const CBlockIndex* pindex, const Consens
unsigned int flags = SCRIPT_VERIFY_NONE;
// Start enforcing P2SH (BIP16)
if (pindex->nHeight >= consensusparams.BIP16Height) {
// BIP16 didn't become active until Apr 1 2012 (on mainnet, and
// retroactively applied to testnet)
// However, only one historical block violated the P2SH rules (on both
// mainnet and testnet), so for simplicity, always leave P2SH
// on except for the one violating block.
if (consensusparams.BIP16Exception.IsNull() || // no bip16 exception on this chain
pindex->phashBlock == nullptr || // this is a new candidate block, eg from TestBlockValidity()
*pindex->phashBlock != consensusparams.BIP16Exception) // this block isn't the historical exception
{
flags |= SCRIPT_VERIFY_P2SH;
}