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[prep/util] help MockMempoolMinFee handle more precise feerates 

Use a virtual size of 1000 to keep precision when using a feerate
(which is rounded to the nearest satoshi per kvb) that isn't just an
integer.

Github-Pull: #33106
Rebased-From: 457cfb61b5
This commit is contained in:
glozow 2025-07-30 15:48:34 -04:00
parent 4d809efeb9
commit f25fc092ab
1 changed files with 4 additions and 0 deletions
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4
src/test/util/setup_common.cpp
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@ -41,6 +41,7 @@
#include <streams.h> #include <streams.h>
#include <test/util/net.h> #include <test/util/net.h>
#include <test/util/random.h> #include <test/util/random.h>
#include <test/util/transaction_utils.h>
#include <test/util/txmempool.h> #include <test/util/txmempool.h>
#include <txdb.h> #include <txdb.h>
#include <txmempool.h> #include <txmempool.h>
@ -582,6 +583,9 @@ void TestChain100Setup::MockMempoolMinFee(const CFeeRate& target_feerate)
CMutableTransaction mtx = CMutableTransaction(); CMutableTransaction mtx = CMutableTransaction();
mtx.vin.emplace_back(COutPoint{Txid::FromUint256(g_insecure_rand_ctx.rand256()), 0}); mtx.vin.emplace_back(COutPoint{Txid::FromUint256(g_insecure_rand_ctx.rand256()), 0});
mtx.vout.emplace_back(1 * COIN, GetScriptForDestination(WitnessV0ScriptHash(CScript() << OP_TRUE))); mtx.vout.emplace_back(1 * COIN, GetScriptForDestination(WitnessV0ScriptHash(CScript() << OP_TRUE)));
// Set a large size so that the fee evaluated at target_feerate (which is usually in sats/kvB) is an integer.
// Otherwise, GetMinFee() may end up slightly different from target_feerate.
BulkTransaction(mtx, 4000);
const auto tx{MakeTransactionRef(mtx)}; const auto tx{MakeTransactionRef(mtx)};
LockPoints lp; LockPoints lp;
// The new mempool min feerate is equal to the removed package's feerate + incremental feerate. // The new mempool min feerate is equal to the removed package's feerate + incremental feerate.