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fuzz: Fuzz reserved weight option in BlockAssembler

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Fabian Jahr 2025-02-05 17:15:34 +01:00
parent 0da2ae35c8
commit fd68e06908
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GPG key ID: F13D1E9D890798CD
1 changed files with 7 additions and 1 deletions
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8
src/test/fuzz/mini_miner.cpp
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@ -129,6 +129,8 @@ FUZZ_TARGET(mini_miner_selection, .init = initialize_miner)
// Make a copy to preserve determinism.
std::deque<COutPoint> available_coins = g_available_coins;
std::vector<CTransactionRef> transactions;
// The maximum block template size we expect to produce
const auto block_adjusted_max_weight = MAX_BLOCK_WEIGHT - MINIMUM_BLOCK_RESERVED_WEIGHT;
LOCK2(::cs_main, pool.cs);
LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 100)
@ -158,7 +160,6 @@ FUZZ_TARGET(mini_miner_selection, .init = initialize_miner)
}
}
const auto block_adjusted_max_weight = MAX_BLOCK_WEIGHT - DEFAULT_BLOCK_RESERVED_WEIGHT;
// Stop if pool reaches block_adjusted_max_weight because BlockAssembler will stop when the
// block template reaches that, but the MiniMiner will keep going.
if ((pool.GetTotalTxSize() + GetVirtualTransactionSize(*tx)) * 4 >= block_adjusted_max_weight) break;
@ -184,6 +185,11 @@ FUZZ_TARGET(mini_miner_selection, .init = initialize_miner)
node::BlockAssembler::Options miner_options;
miner_options.blockMinFeeRate = target_feerate;
miner_options.nBlockMaxWeight = MAX_BLOCK_WEIGHT;
// Only setting reserved weight when necessary based on the template size
const auto reserved_weight = MAX_BLOCK_WEIGHT - pool.GetTotalTxSize() * 4;
if (reserved_weight < DEFAULT_BLOCK_RESERVED_WEIGHT) {
miner_options.block_reserved_weight = reserved_weight - 1;
}
miner_options.test_block_validity = false;
miner_options.coinbase_output_script = CScript() << OP_0;