Struct containsStorageCall

pub struct containsStorageCall {
    pub flags: u32,
    pub isFixedKey: bool,
    pub key: Bytes,
}

Checks whether there is a value stored under the given key.

The key length must not exceed the maximum defined by the contracts module parameter.

Important

This function can only be called via a delegate call! For Solidity, the low level delegatecall function has to be used. For languages that use the FFI of pallet-revive, the crate::HostFn::delegate_call function can be used.

Parameters

• key: The storage key.

Return

Returns the size of the pre-existing value at the specified key. If no entry exists for this key containedKey is false and valueLen is 0. Function with signature containsStorage(uint32,bool,bytes) and selector 0x57ffb2f0.

function containsStorage(uint32 flags, bool isFixedKey, bytes memory key) external view returns (bool containedKey, uint valueLen);

Fields

flags: u32

isFixedKey: bool

key: Bytes

Trait Implementations

impl Clone for containsStorageCall

fn clone(&self) -> containsStorageCall

Returns a copy of the value.

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

Performs copy-assignment from source.

impl SolCall for containsStorageCall

const SIGNATURE: &'static str = "containsStorage(uint32,bool,bytes)"

The function’s ABI signature.

const SELECTOR: [u8; 4]

The function selector: keccak256(SIGNATURE)[0..4]

type Parameters<'a> = (Uint<32>, Bool, Bytes)

The underlying tuple type which represents this type’s arguments.

type Token<'a> = <<containsStorageCall as SolCall>::Parameters<'a> as SolType>::Token<'a>

The arguments’ corresponding [TokenSeq] type.

type Return = containsStorageReturn

The function’s return struct.

type ReturnTuple<'a> = (Bool, Uint<256>)

The underlying tuple type which represents this type’s return values.

type ReturnToken<'a> = <<containsStorageCall as SolCall>::ReturnTuple<'a> as SolType>::Token<'a>

The returns’ corresponding [TokenSeq] type.

fn new<'a>(tuple: <Self::Parameters<'a> as SolType>::RustType) -> Self

Convert from the tuple type used for ABI encoding and decoding.

fn tokenize(&self) -> Self::Token<'_>

Tokenize the call’s arguments.

fn tokenize_returns(ret: &Self::Return) -> Self::ReturnToken<'_>

Tokenize the call’s return values.

fn abi_decode_returns(data: &[u8]) -> Result<Self::Return>

ABI decode this call’s return values from the given slice.

fn abi_decode_returns_validate(data: &[u8]) -> Result<Self::Return>

ABI decode this call’s return values from the given slice, with validation.

fn abi_encoded_size(&self) -> usize

The size of the encoded data in bytes, without its selector.

fn abi_decode_raw(data: &[u8]) -> Result<Self, Error>

ABI decode this call’s arguments from the given slice, without its selector.

fn abi_decode_raw_validate(data: &[u8]) -> Result<Self, Error>

ABI decode this call’s arguments from the given slice, without its selector, with validation.

fn abi_decode(data: &[u8]) -> Result<Self, Error>

ABI decode this call’s arguments from the given slice, with the selector.

fn abi_decode_validate(data: &[u8]) -> Result<Self, Error>

ABI decode this call’s arguments from the given slice, with the selector, with validation.

fn abi_encode_raw(&self, out: &mut Vec<u8>)

ABI encode the call to the given buffer without its selector.

fn abi_encode(&self) -> Vec<u8>

ABI encode the call to the given buffer with its selector.

fn abi_encode_returns(ret: &Self::Return) -> Vec<u8>

ABI encode the call’s return value.

fn abi_encode_returns_tuple<'a, E>(e: &'a E) -> Vec<u8>

where E: SolTypeValue<Self::ReturnTuple<'a>>,

ABI encode the call’s return values.