[−][src]Struct script::VerificationFlags

pub struct VerificationFlags {
    pub none: bool,
    pub verify_p2sh: bool,
    pub verify_strictenc: bool,
    pub verify_dersig: bool,
    pub verify_low_s: bool,
    pub verify_nulldummy: bool,
    pub verify_sigpushonly: bool,
    pub verify_minimaldata: bool,
    pub verify_discourage_upgradable_nops: bool,
    pub verify_cleanstack: bool,
    pub verify_locktime: bool,
    pub verify_checksequence: bool,
    pub verify_witness: bool,
    pub verify_discourage_upgradable_witness_program: bool,
    pub verify_concat: bool,
    pub verify_split: bool,
    pub verify_and: bool,
    pub verify_or: bool,
    pub verify_xor: bool,
    pub verify_div: bool,
    pub verify_mod: bool,
    pub verify_bin2num: bool,
    pub verify_num2bin: bool,
    pub verify_checkdatasig: bool,
}
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Script interpreter verification flags

Fields

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Evaluate P2SH subscripts (softfork safe, BIP16).

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Passing a non-strict-DER signature or one with undefined hashtype to a checksig operation causes script failure. Evaluating a pubkey that is not (0x04 + 64 bytes) or (0x02 or 0x03 + 32 bytes) by checksig causes script failure. (softfork safe, but not used or intended as a consensus rule).

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Passing a non-strict-DER signature to a checksig operation causes script failure (softfork safe, BIP62 rule 1)

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Passing a non-strict-DER signature or one with S > order/2 to a checksig operation causes script failure (softfork safe, BIP62 rule 5).

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verify dummy stack item consumed by CHECKMULTISIG is of zero-length (softfork safe, BIP62 rule 7).

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Using a non-push operator in the scriptSig causes script failure (softfork safe, BIP62 rule 2).

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Require minimal encodings for all push operations (OP_0... OP_16, OP_1NEGATE where possible, direct pushes up to 75 bytes, OP_PUSHDATA up to 255 bytes, OP_PUSHDATA2 for anything larger). Evaluating any other 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 (BIP62 rule 4). (softfork safe)

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Discourage use of NOPs reserved for upgrades (NOP1-10)

Provided so that nodes can avoid accepting or mining transactions containing executed NOP's whose meaning may change after a soft-fork, thus rendering the script invalid; with this flag set executing 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, e.g. within an unexecuted IF ENDIF block, are not rejected.

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Require that only a single stack element remains after evaluation. This changes the success criterion from "At least one stack element must 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 be true". (softfork safe, BIP62 rule 6) Note: CLEANSTACK should never be used without P2SH or WITNESS.

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Verify CHECKLOCKTIMEVERIFY

See BIP65 for details.

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support CHECKSEQUENCEVERIFY opcode

See BIP112 for details

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Support segregated witness

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Making v1-v16 witness program non-standard

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Support OP_CAT opcode

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Support OP_SPLIT opcode

This opcode replaces OP_SUBSTR => enabling both OP_SPLIT && OP_SUBSTR would be an error

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Support OP_AND opcode

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Support OP_OR opcode

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Support OP_XOR opcode

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Support OP_DIV opcode

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Support OP_MOD opcode

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Support OP_BIN2NUM opcode

This opcode replaces OP_RIGHT => enabling both OP_BIN2NUM && OP_RIGHT would be an error

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Support OP_NUM2BIN opcode

This opcode replaces OP_LEFT => enabling both OP_NUM2BIN && OP_LEFT would be an error

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Support OP_CHECKDATASIG and OP_CHECKDATASIGVERIFY opcodes.

Methods

impl VerificationFlags
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Trait Implementations

impl Default for VerificationFlags
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Returns the "default value" for a type. Read more

impl Debug for VerificationFlags
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Formats the value using the given formatter. Read more

impl PartialEq for VerificationFlags
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This method tests for self and other values to be equal, and is used by ==. Read more

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This method tests for !=.

Auto Trait Implementations

impl Send for VerificationFlags

impl Sync for VerificationFlags

Blanket Implementations

impl<T> From for T
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Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

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🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized, 
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ⓘImportant traits for &'a mut R
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Immutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

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🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized, 
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ⓘImportant traits for &'a mut R
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Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized, 
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🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more