68 lines
3.5 KiB
Python
68 lines
3.5 KiB
Python
MAX_BLOCK_SIZE = 1000000
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MAX_STANDARD_TX_SIZE = 100000
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MAX_P2SH_SIGOPS = 15
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MAX_BLOCK_SIGOPS = MAX_BLOCK_SIZE/50
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MAX_STANDARD_TX_SIGOPS = MAX_BLOCK_SIGOPS/5
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MIN_FEE = 10
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MAX_SCRIPT_ELEMENT_SIZE = 520
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MAX_OPS_PER_SCRIPT = 201
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MAX_PUBKEYS_PER_MULTISIG = 20
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NULL_DATA_LIMIT = 80
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# SCRIPT VERIFICATION FLAGS
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SCRIPT_VERIFY_NONE = 0b0000000000000001
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# ??
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SCRIPT_VERIFY_P2SH = 0b0000000000000010
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# Evaluate P2SH subscripts (softfork safe, BIP16).
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SCRIPT_VERIFY_STRICTENC = 0b0000000000000100
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# Passing a non-strict-DER signature or one with undefined hashtype to a
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# checksig operation causes script failure.
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# Evaluating a pubkey that is not (0x04 + 64 bytes) or (0x02 or 0x03 + 32 bytes)
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# by checksig causes script failure.
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# (softfork safe, but not used or intended as a consensus rule).
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SCRIPT_VERIFY_DERSIG = 0b0000000000001000
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# Passing a non-strict-DER signature to a checksig operation causes script failure
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# (softfork safe, BIP62 rule 1)
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SCRIPT_VERIFY_LOW_S = 0b0000000000010000
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# Passing a non-strict-DER signature or one with S > order/2 to a checksig operation
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# causes script failure
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# (softfork safe, BIP62 rule 5).
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SCRIPT_VERIFY_NULLDUMMY = 0b0000000000100000
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# verify dummy stack item consumed by CHECKMULTISIG is of zero-length
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# (softfork safe, BIP62 rule 7).
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SCRIPT_VERIFY_SIGPUSHONLY = 0b0000000001000000
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# Using a non-push operator in the scriptSig causes script failure
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# (softfork safe, BIP62 rule 2).
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SCRIPT_VERIFY_MINIMALDATA = 0b0000000010000000
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# Require minimal encodings for all push operations (OP_0... OP_16, OP_1NEGATE
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# where possible, direct pushes up to 75 bytes, OP_PUSHDATA up to 255 bytes,
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# OP_PUSHDATA2 for anything larger). Evaluating any other push causes the script
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# to fail (BIP62 rule 3). In addition, whenever a stack element is interpreted
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# as a number, it must be of minimal length (BIP62 rule 4).
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SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS = 0b0000000100000000
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# Discourage use of NOPs reserved for upgrades (NOP1-10)
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# Provided so that nodes can avoid accepting or mining transactions
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# containing executed NOP's whose meaning may change after a soft-fork,
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# thus rendering the script invalid; with this flag set executing
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# discouraged NOPs fails the script. This verification flag will never be
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# a mandatory flag applied to scripts in a block. NOPs that are not
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# executed, e.g. within an unexecuted IF ENDIF block, are *not* rejected.
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SCRIPT_VERIFY_CLEANSTACK = 0b0000001000000000
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# Require that only a single stack element remains after evaluation. This changes the success criterion from
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# "At least one stack element must remain, and when interpreted as a boolean, it must be true" to
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# "Exactly one stack element must remain, and when interpreted as a boolean, it must be true".
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# (softfork safe, BIP62 rule 6)
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# Note: CLEANSTACK should never be used without P2SH.
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SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY = 0b0000010000000000
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# See BIP65 for details.
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SCRIPT_VERIFY_CHECKSEQUENCEVERIFY = 0b0000100000000000
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# See BIP112 for details
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MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH
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STANDARD_SCRIPT_VERIFY_FLAGS = MANDATORY_SCRIPT_VERIFY_FLAGS |\
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SCRIPT_VERIFY_STRICTENC |\
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SCRIPT_VERIFY_MINIMALDATA |\
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SCRIPT_VERIFY_NULLDUMMY |\
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SCRIPT_VERIFY_DISCOURAGE_UPGRADABLE_NOPS |\
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SCRIPT_VERIFY_CLEANSTACK |