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fuzz: coinselection, improve ComputeAndSetWaste

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Instead of using `cost_of_change` for `min_viable_change`
and `change_cost`, and 0 for `change_fee`, use values from
`coin_params`. The previous values don't generate any effects
that is relevant for that context.
This commit is contained in:
brunoerg 2023-06-01 18:37:54 -03:00
parent 1e351e5db1
commit 0df0438c60
1 changed files with 6 additions and 3 deletions
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9
src/wallet/test/fuzz/coinselection.cpp
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@ -85,6 +85,7 @@ FUZZ_TARGET(coinselection)
const CFeeRate long_term_fee_rate{ConsumeMoney(fuzzed_data_provider, /*max=*/COIN)};
const CFeeRate effective_fee_rate{ConsumeMoney(fuzzed_data_provider, /*max=*/COIN)};
const CAmount cost_of_change{ConsumeMoney(fuzzed_data_provider, /*max=*/COIN)};
const CAmount min_viable_change{ConsumeMoney(fuzzed_data_provider, /*max=*/COIN)};
const CAmount target{fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(1, MAX_MONEY)};
const bool subtract_fee_outputs{fuzzed_data_provider.ConsumeBool()};
@ -93,6 +94,8 @@ FUZZ_TARGET(coinselection)
coin_params.m_subtract_fee_outputs = subtract_fee_outputs;
coin_params.m_long_term_feerate = long_term_fee_rate;
coin_params.m_effective_feerate = effective_fee_rate;
coin_params.min_viable_change = min_viable_change;
coin_params.m_cost_of_change = cost_of_change;
coin_params.change_output_size = fuzzed_data_provider.ConsumeIntegralInRange<int>(10, 1000);
coin_params.m_change_fee = effective_fee_rate.GetFee(coin_params.change_output_size);
@ -110,7 +113,7 @@ FUZZ_TARGET(coinselection)
}
// Run coinselection algorithms
auto result_bnb = SelectCoinsBnB(group_pos, target, cost_of_change, MAX_STANDARD_TX_WEIGHT);
auto result_bnb = SelectCoinsBnB(group_pos, target, coin_params.m_cost_of_change, MAX_STANDARD_TX_WEIGHT);
if (result_bnb) {
(void)result_bnb->GetShuffledInputVector();
(void)result_bnb->GetInputSet();
@ -119,7 +122,7 @@ FUZZ_TARGET(coinselection)
auto result_srd = SelectCoinsSRD(group_pos, target, coin_params.m_change_fee, fast_random_context, MAX_STANDARD_TX_WEIGHT);
if (result_srd) {
assert(result_srd->GetChange(CHANGE_LOWER, coin_params.m_change_fee) > 0); // Demonstrate that SRD creates change of at least CHANGE_LOWER
result_srd->ComputeAndSetWaste(cost_of_change, cost_of_change, 0);
result_srd->ComputeAndSetWaste(coin_params.min_viable_change, coin_params.m_cost_of_change, coin_params.m_change_fee);
(void)result_srd->GetShuffledInputVector();
(void)result_srd->GetInputSet();
}
@ -127,7 +130,7 @@ FUZZ_TARGET(coinselection)
CAmount change_target{GenerateChangeTarget(target, coin_params.m_change_fee, fast_random_context)};
auto result_knapsack = KnapsackSolver(group_all, target, change_target, fast_random_context, MAX_STANDARD_TX_WEIGHT);
if (result_knapsack) {
result_knapsack->ComputeAndSetWaste(cost_of_change, cost_of_change, 0);
result_knapsack->ComputeAndSetWaste(coin_params.min_viable_change, coin_params.m_cost_of_change, coin_params.m_change_fee);
(void)result_knapsack->GetShuffledInputVector();
(void)result_knapsack->GetInputSet();
}