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Remove temporary fork handling for emergency difficulty reduction on testnet

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As we reset testnet, we can also remove the special handling for old blocks.
This commit is contained in:
Alexander Block 2018-12-13 21:51:27 +01:00
parent db4f43f874
commit 0fca0e6fc8
1 changed files with 11 additions and 36 deletions
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29
src/pow.cpp
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@ -89,44 +89,19 @@ unsigned int static DarkGravityWave(const CBlockIndex* pindexLast, const CBlockH
return bnPowLimit.GetCompact();
}
if (params.fPowAllowMinDifficultyBlocks && (
// testnet ...
(params.hashDevnetGenesisBlock.IsNull() && pindexLast->nChainWork >= UintToArith256(uint256S("0x000000000000000000000000000000000000000000000000003e9ccfe0e03e01"))) ||
// or devnet
!params.hashDevnetGenesisBlock.IsNull())) {
// NOTE: 000000000000000000000000000000000000000000000000003e9ccfe0e03e01 is the work of the "wrong" chain,
// so this rule activates there immediately and new blocks with high diff from that chain are going
// to be rejected by updated nodes. Note, that old nodes are going to reject blocks from updated nodes
// after the "right" chain reaches this amount of work too. This is a temporary condition which should
// be removed when we decide to hard-fork testnet again.
// TODO: remove "testnet+work OR devnet" part on next testnet hard-fork
// Special difficulty rule for testnet/devnet:
// If the new block's timestamp is more than 2* 2.5 minutes
// then allow mining of a min-difficulty block.
// start using smoother adjustment on testnet when total work hits
// 000000000000000000000000000000000000000000000000003ff00000000000
if (pindexLast->nChainWork >= UintToArith256(uint256S("0x000000000000000000000000000000000000000000000000003ff00000000000"))
// and immediately on devnet
|| !params.hashDevnetGenesisBlock.IsNull()) {
if (params.fPowAllowMinDifficultyBlocks) {
// recent block is more than 2 hours old
if (pblock->GetBlockTime() > pindexLast->GetBlockTime() + 2 * 60 * 60) {
return bnPowLimit.GetCompact();
}
// recent block is more than 10 minutes old
if (pblock->GetBlockTime() > pindexLast->GetBlockTime() + params.nPowTargetSpacing*4) {
if (pblock->GetBlockTime() > pindexLast->GetBlockTime() + params.nPowTargetSpacing * 4) {
arith_uint256 bnNew = arith_uint256().SetCompact(pindexLast->nBits) * 10;
if (bnNew > bnPowLimit) {
bnNew = bnPowLimit;
}
return bnNew.GetCompact();
}
} else {
// old stuff
if (pblock->GetBlockTime() > pindexLast->GetBlockTime() + params.nPowTargetSpacing*2) {
return bnPowLimit.GetCompact();
}
}
}
const CBlockIndex *pindex = pindexLast;