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src/script/script_flags.h
| Show All 16 Lines | enum { | ||||
| // Passing a non-strict-DER signature or one with undefined hashtype to a | // Passing a non-strict-DER signature or one with undefined hashtype to a | ||||
| // checksig operation causes script failure. Evaluating a pubkey that is not | // checksig operation causes script failure. Evaluating a pubkey that is not | ||||
| // (0x04 + 64 bytes) or (0x02 or 0x03 + 32 bytes) by checksig causes script | // (0x04 + 64 bytes) or (0x02 or 0x03 + 32 bytes) by checksig causes script | ||||
| // failure. | // failure. | ||||
| SCRIPT_VERIFY_STRICTENC = (1U << 1), | SCRIPT_VERIFY_STRICTENC = (1U << 1), | ||||
| // Passing a non-strict-DER signature to a checksig operation causes script | // Passing a non-strict-DER signature to a checksig operation causes script | ||||
| // failure (softfork safe, BIP62 rule 1) | // failure (BIP62 rule 1) | ||||
| SCRIPT_VERIFY_DERSIG = (1U << 2), | SCRIPT_VERIFY_DERSIG = (1U << 2), | ||||
| // Passing a non-strict-DER signature or one with S > order/2 to a checksig | // Passing a non-strict-DER signature or one with S > order/2 to a checksig | ||||
| // operation causes script failure | // operation causes script failure | ||||
| // (softfork safe, BIP62 rule 5). | // (BIP62 rule 5). | ||||
| SCRIPT_VERIFY_LOW_S = (1U << 3), | SCRIPT_VERIFY_LOW_S = (1U << 3), | ||||
| // Using a non-push operator in the scriptSig causes script failure | // Using a non-push operator in the scriptSig causes script failure | ||||
| // (softfork safe, BIP62 rule 2). | // (BIP62 rule 2). | ||||
| SCRIPT_VERIFY_SIGPUSHONLY = (1U << 5), | SCRIPT_VERIFY_SIGPUSHONLY = (1U << 5), | ||||
| // Require minimal encodings for all push operations (OP_0... OP_16, | // Require minimal encodings for all push operations (OP_0... OP_16, | ||||
| // OP_1NEGATE where possible, direct pushes up to 75 bytes, OP_PUSHDATA up | // OP_1NEGATE where possible, direct pushes up to 75 bytes, OP_PUSHDATA up | ||||
| // to 255 bytes, OP_PUSHDATA2 for anything larger). Evaluating any other | // to 255 bytes, OP_PUSHDATA2 for anything larger). Evaluating any other | ||||
| // push causes the script to fail (BIP62 rule 3). In addition, whenever a | // push causes the script to fail (BIP62 rule 3). In addition, whenever a | ||||
| // stack element is interpreted as a number, it must be of minimal length | // stack element is interpreted as a number, it must be of minimal length | ||||
| // (BIP62 rule 4). | // (BIP62 rule 4). | ||||
| // (softfork safe) | |||||
| SCRIPT_VERIFY_MINIMALDATA = (1U << 6), | SCRIPT_VERIFY_MINIMALDATA = (1U << 6), | ||||
| // Discourage use of NOPs reserved for upgrades (NOP1-10) | // Discourage use of NOPs reserved for upgrades (NOP1-10) | ||||
| // | // | ||||
| // Provided so that nodes can avoid accepting or mining transactions | // Provided so that nodes can avoid accepting or mining transactions | ||||
| // containing executed NOP's whose meaning may change after a soft-fork, | // containing executed NOP's whose meaning may change after a soft-fork, | ||||
| // thus rendering the script invalid; with this flag set executing | // thus rendering the script invalid; with this flag set executing | ||||
| // discouraged NOPs fails the script. This verification flag will never be a | // discouraged NOPs fails the script. This verification flag will never be a | ||||
| // mandatory flag applied to scripts in a block. NOPs that are not executed, | // mandatory flag applied to scripts in a block. NOPs that are not executed, | ||||
| // e.g. within an unexecuted IF ENDIF block, are *not* rejected. | // e.g. within an unexecuted IF ENDIF block, are *not* rejected. | ||||
| SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS = (1U << 7), | SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS = (1U << 7), | ||||
| // Require that only a single stack element remains after evaluation. This | // Require that only a single stack element remains after evaluation. This | ||||
| // changes the success criterion from "At least one stack element must | // changes the success criterion from "At least one stack element must | ||||
| // remain, and when interpreted as a boolean, it must be true" to "Exactly | // remain, and when interpreted as a boolean, it must be true" to "Exactly | ||||
| // one stack element must remain, and when interpreted as a boolean, it must | // one stack element must remain, and when interpreted as a boolean, it must | ||||
| // be true". | // be true". | ||||
| // (softfork safe, BIP62 rule 6) | // (BIP62 rule 6) | ||||
| // Note: CLEANSTACK should never be used without P2SH or WITNESS. | // Note: CLEANSTACK should never be used without P2SH. | ||||
| // Note: The Segwit Recovery feature is an exception to CLEANSTACK | // Note: The Segwit Recovery feature is an exception to CLEANSTACK | ||||
| SCRIPT_VERIFY_CLEANSTACK = (1U << 8), | SCRIPT_VERIFY_CLEANSTACK = (1U << 8), | ||||
| // Verify CHECKLOCKTIMEVERIFY | // Verify CHECKLOCKTIMEVERIFY | ||||
| // | // | ||||
| // See BIP65 for details. | // See BIP65 for details. | ||||
| SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY = (1U << 9), | SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY = (1U << 9), | ||||
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