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// Copyright (c) 2011-2014 The Bitcoin Core developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "main.h"
#include "miner.h"
#include "uint256.h"
#include "util.h"
#include <boost/test/unit_test.hpp>
// Tests the majority rule which states that after 1000 v2 blocks no v1 block can go
BOOST_AUTO_TEST_SUITE(blockv2_tests)
static CScript scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
static void SetEmptyBlock(CBlock * pblock)
{
pblock->nVersion = 2;
pblock->nTime = chainActive.Tip()->GetMedianTimePast()+1;
pblock->nNonce = 0;
}
static void SetBlockDefaultAttributesAndHeight(CBlock * pblock,bool addHeight,int difValue)
{
SetEmptyBlock(pblock);
// Add the coinbase
CMutableTransaction txCoinbase(pblock->vtx[0]);
if (addHeight)
txCoinbase.vin[0].scriptSig = (CScript() << (chainActive.Height()+1+difValue) << 0);
else
txCoinbase.vin[0].scriptSig = (CScript() << difValue << 0); // At least size 2, this is a protocol spec
txCoinbase.vout[0].scriptPubKey = CScript();
pblock->vtx[0] = CTransaction(txCoinbase);
pblock->hashMerkleRoot = pblock->BuildMerkleTree();
}
void CheckSubsidyHalving(CBlockTemplate * &pblocktemplate, CBlock * &pblock)
{
if ((chainActive.Height()+1) % Params().SubsidyHalvingInterval() == 0)
{
// The RegTest network has a low subsidy halving interval (150) so
// we must recompute the coinbase subsidy if we reach the boundary.
// preserve parent hash
uint256 prevParent = pblock->hashPrevBlock;
delete pblocktemplate;
pblocktemplate = CreateNewBlock(scriptPubKey);
pblock = &pblocktemplate->block; // pointer for convenience
pblock->hashPrevBlock = prevParent;
}
}
void Blockv2test()
{
assert(Params().NetworkID() == CBaseChainParams::UNITTEST);
ModifiableParams()->setSkipProofOfWorkCheck(true);
// We don't know the state of the block-chain here: it depends on which other tests are run before this test.
// See https://github.com/bitcoin/bitcoin/pull/4688 for a patch that allows the re-creation of the block-chain
// for each testcase that requires it.
// If miner_tests.cpp is run before, the chain will be 100 blocks long, and all of them will be v1
LogPrintf("Blockv2test testcase starts\n");
CBlockTemplate *pblocktemplate;
CScript script;
uint256 hash;
int PreviousHeight;
LOCK(cs_main);
// Simple block creation, nothing special yet.
pblocktemplate = CreateNewBlock(scriptPubKey);
CBlock *pblock = &pblocktemplate->block; // pointer for convenience
LogPrintf("Blockv2test block v1 add begin\n");
// First create a block v1, check that it is accepted. The block has an invalid height
SetBlockDefaultAttributesAndHeight(pblock,false,5000);
pblock->nVersion = 1;
CValidationState state1;
PreviousHeight = chainActive.Height();
BOOST_CHECK(ProcessBlock(state1, NULL, pblock));
BOOST_CHECK(state1.IsValid());
BOOST_CHECK((PreviousHeight+1) == chainActive.Height()); // to differentiate from orphan blocks, which also get accepted in ProcessBlock()
pblock->hashPrevBlock = pblock->GetHash(); // update parent
// Now create exactly 1000 blocks v2
// First check that the supermajority threshold is exactly 1000 blocks
BOOST_CHECK(Params().ToCheckBlockUpgradeMajority()==1000); //
BOOST_CHECK(Params().EnforceBlockUpgradeMajority()==750);
BOOST_CHECK(Params().RejectBlockOutdatedMajority()==950);
// Over the last 1000 blocks, 750 blocks must be v2 to switch to v2-only mode.
// Here we're testing only the last 750, not any subset.
LogPrintf("Blockv2test BIP30 repetition begin\n");
// First, if we try to add a block v2 with the same coinbase tx, we should get
// "bad-txns-BIP30" because the coinbase tx has the same hash as the previous.
// Unluckily, even if ConnectBlock returns a "bad-txns-BIP30", ActivateBestChainStep clears
// the state, so we get true here and the "bad-txns-BIP30" reason is lost.
// We verify instead that the chain height has not been incremented.
CValidationState state7;
PreviousHeight = chainActive.Height();
CheckSubsidyHalving(pblocktemplate,pblock);
SetBlockDefaultAttributesAndHeight(pblock,false,5000); //
pblock->nVersion = 2;
BOOST_CHECK(ProcessBlock(state7, NULL, pblock)); // should we care about the return value?
BOOST_CHECK(state7.IsValid());
BOOST_CHECK(PreviousHeight == chainActive.Height()); // we check the block has not been added.
LogPrintf("Blockv2test 750 v2 blocks begin\n");
for (int i=0;i<750;i++)
{
LogPrintf("Blockv2test block %d begin\n",i);
CheckSubsidyHalving(pblocktemplate,pblock);
// We add a value to the height to make is NOT equal to the actual height.
SetBlockDefaultAttributesAndHeight(pblock,true,1000); // blocks version 2 without height are allowed! for only 750 blocks
pblock->nVersion = 2;
CValidationState state;
PreviousHeight = chainActive.Height();
BOOST_CHECK(ProcessBlock(state, NULL, pblock));
BOOST_CHECK(state.IsValid());
BOOST_CHECK((PreviousHeight+1) == chainActive.Height()); // to differentiate from orphan blocks, which also get accepted in ProcessBlock()
pblock->hashPrevBlock = pblock->GetHash(); // update parent
}
LogPrintf("Blockv2test v2 without height rejected begin\n");
// Now we try to add a block v2, with an invalid height and it should be rejected. We use 2000 because is not in the range [1000..1750].
CheckSubsidyHalving(pblocktemplate,pblock);
SetBlockDefaultAttributesAndHeight(pblock,true,2000); //
pblock->nVersion = 2;
CValidationState state0;
BOOST_CHECK(ProcessBlock(state0, NULL, pblock)==false);
BOOST_CHECK(!state0.IsValid());
BOOST_CHECK(state0.GetRejectReason()=="bad-cb-height");
// Do not update parent since block has failed
LogPrintf("Blockv2test v2 with height accepted begin\n");
// Now we add a block with height, must be ok.
for (int i=0;i<200;i++)
{
LogPrintf("Blockv2test v2block %d begin\n",i);
CheckSubsidyHalving(pblocktemplate,pblock);
SetBlockDefaultAttributesAndHeight(pblock,true,0);
pblock->nVersion = 2;
CValidationState state;
PreviousHeight = chainActive.Height();
BOOST_CHECK(ProcessBlock(state, NULL, pblock));
BOOST_CHECK(state.IsValid());
BOOST_CHECK((PreviousHeight+1) == chainActive.Height()); // to differentiate from orphan blocks, which also get accepted in ProcessBlock()
pblock->hashPrevBlock = pblock->GetHash(); // update parent
}
LogPrintf("Blockv2test block v1 rejected\n");
// Now we add 200 additional blocks, until we get 950 (the threshold were v1 blocks are not accepted anymore)
// Now we try to add a block v1, it should be rejected, even if it hash the height field
CheckSubsidyHalving(pblocktemplate,pblock);
SetBlockDefaultAttributesAndHeight(pblock,true,0);
pblock->nVersion = 1;
CValidationState state2;
BOOST_CHECK(ProcessBlock(state2, NULL, pblock)==false);
BOOST_CHECK(!state2.IsValid());
BOOST_CHECK(state2.GetRejectReason()=="bad-version");
// Do not update parent since block has failed
// Some other missing tests, added here as bonus...
// Block time too old check
CheckSubsidyHalving(pblocktemplate,pblock);
SetBlockDefaultAttributesAndHeight(pblock,true,0);
pblock->nVersion = 2;
pblock->nTime = chainActive.Tip()->GetMedianTimePast()-1;
CValidationState state4;
BOOST_CHECK(ProcessBlock(state4, NULL, pblock)==false);
BOOST_CHECK(!state4.IsValid());
BOOST_CHECK(state4.GetRejectReason()=="time-too-old");
// Do not update parent since block has failed
// Adding a non-final coinbase, must modify coinbase
CheckSubsidyHalving(pblocktemplate,pblock);
SetEmptyBlock(pblock);
// Use a mutable coinbase to change nLockTime and nSequence
CMutableTransaction txCoinbase(pblock->vtx[0]);
txCoinbase.vin[0].scriptSig = (CScript() << chainActive.Height() << 0);
txCoinbase.nLockTime = LOCKTIME_THRESHOLD-1; // refers to height
txCoinbase.vin[0].nSequence = 1; // non-zero sequence
pblock->vtx[0] = CTransaction(txCoinbase);
pblock->nVersion = 2;
pblock->hashMerkleRoot = pblock->BuildMerkleTree();
CValidationState state5;
BOOST_CHECK(ProcessBlock(state5, NULL, pblock)==false);
BOOST_CHECK(!state5.IsValid());
BOOST_CHECK(state5.GetRejectReason()=="bad-txns-nonfinal");
// Do not update parent since block has failed
delete pblocktemplate;
ModifiableParams()->setSkipProofOfWorkCheck(false);
LogPrintf("Blockv2test testcase ends\n");
}
BOOST_AUTO_TEST_CASE(Blockv2testcase)
{
Blockv2test();
}
BOOST_AUTO_TEST_SUITE_END()
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