# [−] [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,
    }

Script interpreter verification flags

## Fields

`none: bool` `verify_p2sh: bool`

Evaluate P2SH subscripts (softfork safe, BIP16).

`verify_strictenc: bool`

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).

`verify_dersig: bool`

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

`verify_low_s: bool`

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

`verify_nulldummy: bool`

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

`verify_sigpushonly: bool`

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

`verify_minimaldata: bool`

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)

`verify_discourage_upgradable_nops: bool`

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.

`verify_cleanstack: bool`

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.

`verify_locktime: bool`

Verify CHECKLOCKTIMEVERIFY

See BIP65 for details.

`verify_checksequence: bool`

support CHECKSEQUENCEVERIFY opcode

See BIP112 for details

`verify_witness: bool`

Support segregated witness

`verify_discourage_upgradable_witness_program: bool`

Making v1-v16 witness program non-standard

`verify_concat: bool`

Support OP_CAT opcode

`verify_split: bool`

Support OP_SPLIT opcode

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

`verify_and: bool`

Support OP_AND opcode

`verify_or: bool`

Support OP_OR opcode

`verify_xor: bool`

Support OP_XOR opcode

`verify_div: bool`

Support OP_DIV opcode

`verify_mod: bool`

Support OP_MOD opcode

`verify_bin2num: bool`

Support OP_BIN2NUM opcode

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

`verify_num2bin: bool`

Support OP_NUM2BIN opcode

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

`verify_checkdatasig: bool`

Support OP_CHECKDATASIG and OP_CHECKDATASIGVERIFY opcodes.

## Methods

###

`impl VerificationFlags`

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####

`pub fn verify_p2sh(self, value: bool) -> Self`

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`pub fn verify_strictenc(self, value: bool) -> Self`

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`pub fn verify_locktime(self, value: bool) -> Self`

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`pub fn verify_checksequence(self, value: bool) -> Self`

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`pub fn verify_dersig(self, value: bool) -> Self`

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`pub fn verify_witness(self, value: bool) -> Self`

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`pub fn verify_nulldummy(self, value: bool) -> Self`

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`pub fn verify_sigpushonly(self, value: bool) -> Self`

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`pub fn verify_cleanstack(self, value: bool) -> Self`

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`pub fn verify_discourage_upgradable_witness_program(self, value: bool) -> Self`

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`pub fn verify_concat(self, value: bool) -> Self`

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`pub fn verify_split(self, value: bool) -> Self`

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`pub fn verify_and(self, value: bool) -> Self`

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`pub fn verify_or(self, value: bool) -> Self`

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`pub fn verify_xor(self, value: bool) -> Self`

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`pub fn verify_div(self, value: bool) -> Self`

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`pub fn verify_mod(self, value: bool) -> Self`

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`pub fn verify_bin2num(self, value: bool) -> Self`

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`pub fn verify_num2bin(self, value: bool) -> Self`

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`pub fn verify_checkdatasig(self, value: bool) -> Self`

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## Trait Implementations

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`impl Default for VerificationFlags`

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`fn default() -> VerificationFlags`

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Returns the "default value" for a type. Read more

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`impl Debug for VerificationFlags`

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`fn fmt(&self, f: &mut Formatter) -> Result`

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Formats the value using the given formatter. Read more

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`impl PartialEq for VerificationFlags`

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`fn eq(&self, other: &VerificationFlags) -> bool`

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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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`fn ne(&self, other: &VerificationFlags) -> bool`

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This method tests for `!=`.

## Auto Trait Implementations

###

`impl Send for VerificationFlags`

###

`impl Sync for VerificationFlags`

## Blanket Implementations

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`impl<T> From for T`

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`fn from(t: T) -> T`

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Performs the conversion.

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`impl<T, U> Into for T where U: From<T>,`

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`fn into(self) -> U`

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Performs the conversion.

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`impl<T, U> TryFrom for T where T: From<U>,`

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#### `type Error = !`

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

The type returned in the event of a conversion error.

####

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::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

### Important traits for &'a mut R

`impl<'a, R> Read for &'a mut R where
R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;`

`fn borrow(&self) -> &T`

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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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#### `type Error = <U as TryFrom<T>>::Error`

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

The type returned in the event of a conversion error.

####

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::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

### Important traits for &'a mut R

`impl<'a, R> Read for &'a mut R where
R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;`

`fn borrow_mut(&mut self) -> &mut T`

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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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####

`fn get_type_id(&self) -> TypeId`

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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

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