Enum Access

pub enum Access {
    ThisAddress,
    ThisContractAddress,
    MutKeys,
    RepeatCounter,
    DecisionVar,
    DecisionVarLen,
    State,
    StateLen,
    NumSlots,
    PredicateExists,
}

Operations for accessing input data.

Variants

ThisAddress

0x30: THIS

Get the content hash of this predicate.

This operation returns a list of words with a length of 4, representing the hash.

Stack Output

[key]

ThisContractAddress

0x31: THISC

Get the content hash of the contract this predicate belongs to.

This operation returns a list of words with a length of 4, representing the contract’s hash.

Stack Output

[key]

MutKeys

0x34: MKEYS

Push the keys of the proposed state mutations onto the stack.

Note the order is non-deterministic because this is a set.

Returns only total length 0 if there are no mutations.

Stack Output

[key_0, key_0_len, ...key_N, key_N_len, total_length]

RepeatCounter

0x36: REPC

Access the top repeat counters current value.

Stack Output

[counter_value]

DecisionVar

0x37: VAR

Access a range of len words starting from value_ix within the decision variable located at slot_ix.

Returns a list of decision words with length equal to the specified len.

Stack Input

[slot_ix, value_ix, len]

Stack Output

[word, ...] The stack output length depends on the value of the len stack input word.

Panics

• slot_ix is out of range.
• The range value_ix..(value_ix + len) is out of range.

DecisionVarLen

0x38: VLEN

Get the length of a the decision variable value located at slot_ix.

Stack Input

[slot_ix]

Stack Output

[len]

Panics

• slot_ix is out of range.

State

0x39

Access a range of words from the state value located in the slot at slot_ix.

Push len words from the value onto the stack, starting from the word at value_ix.

The argument delta false accesses pre state. The argument delta true accesses post state.

Stack Input

[slot_ix, value_ix, len, delta]

Stack Output

[word, ...] The stack output length depends on the value of the len stack input word.

Panics

• slot_ix is out of range.
• The range value_ix..(value_ix + len) is out of range.
• delta is not a boolean.

StateLen

0x3A: SLEN

Get the length of a state value at a specified slot_ix.

The argument delta false accesses pre state. The argument delta true accesses post state.

Returns the length of the state value.

Stack Input

[slot_ix, delta]

Stack Output

[len]

Panics

• slot_ix is out of range.
• delta is not a boolean.

NumSlots

0x3B: NSLT

Get the number of decision var or state slots.

which_slots:

• 0 for decision vars.

• 1 for pre state slots.

• 2 for post state slots.

Stack Input

[which_slots]

Stack Output

[len]

PredicateExists

0x3C: PEX

Check if a solution to a predicate exists within the same solution with the hash of the arguments and address.

Returns true if the predicate exists.

Stack Input

[sha256(arg0len, arg0, argNlen, argN, contract_addr, predicate_addr)]

Stack Output

[bool]

Trait Implementations

impl Clone for Access

fn clone(&self) -> Access

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Access

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl From<Access> for Constraint

fn from(subgroup: Access) -> Constraint

Converts to this type from the input type.

impl Hash for Access

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Access

fn cmp(&self, other: &Access) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Access

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Access

fn partial_cmp(&self, other: &Access) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl ToBytes for Access

type Bytes = Access

The iterator yielding bytes.

fn to_bytes(&self) -> <Access as ToBytes>::Bytes

Convert the operation to its serialized form in bytes.

impl ToOpcode for Access

type Opcode = Access

The associated Opcode type.

fn to_opcode(&self) -> <Access as ToOpcode>::Opcode

The opcode associated with this operation.

impl TryFromBytes for Access

type Error = FromBytesError

Represents any error that might occur while parsing an op from bytes.

fn try_from_bytes( bytes: &mut impl Iterator<Item = u8>, ) -> Option<Result<Access, <Access as TryFromBytes>::Error>>

Parse a single operation from the given iterator yielding bytes.

impl Copy for Access

impl Eq for Access

impl StructuralPartialEq for Access