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doc: Update comments for AreInputsStandard to match code

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Anthony Towns 2025-03-24 18:31:03 +10:00
parent 770d39a376
commit 52ede28a8a
1 changed files with 11 additions and 13 deletions
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src/policy/policy.cpp
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@ -169,20 +169,18 @@ bool IsStandardTx(const CTransaction& tx, const std::optional<unsigned>& max_dat
} }
/** /**
* Check transaction inputs to mitigate two * Check transaction inputs.
* potential denial-of-service attacks:
* *
* 1. scriptSigs with extra data stuffed into them, * This does three things:
* not consumed by scriptPubKey (or P2SH script) * * Prevents mempool acceptance of spends of future
* 2. P2SH scripts with a crazy number of expensive * segwit versions we don't know how to validate
* CHECKSIG/CHECKMULTISIG operations * * Mitigates a potential denial-of-service attack with
* * P2SH scripts with a crazy number of expensive
* Why bother? To avoid denial-of-service attacks; an attacker * CHECKSIG/CHECKMULTISIG operations.
* can submit a standard HASH... OP_EQUAL transaction, * * Prevents spends of unknown/irregular scriptPubKeys,
* which will get accepted into blocks. The redemption * which mitigates potential denial-of-service attacks
* script can be anything; an attacker could use a very * involving expensive scripts and helps reserve them
* expensive-to-check-upon-redemption script like: * as potential new upgrade hooks.
* DUP CHECKSIG DROP ... repeated 100 times... OP_1
* *
* Note that only the non-witness portion of the transaction is checked here. * Note that only the non-witness portion of the transaction is checked here.
*/ */