ink_macro

Macro selector_id

Source 
selector_id!() { /* proc-macro */ }
Expand description

Computes the selector of the string and expands into its u32 representation.

§Note

  • The computation takes place at compilation time of the crate.
  • Requires an ABI parameter as the first argument to specify the selector computation method.

§Arguments

  • Abi::Ink: Uses ink! ABI (BLAKE-2 256-bit hash)
  • Abi::Sol: Uses Solidity ABI (Keccak-256 hash)

§Example

// ink! ABI (BLAKE-2)
assert_eq!(selector_id!(Abi::Ink, "hello"), 843960066,);

// Solidity ABI (Keccak-256)
assert_eq!(selector_id!(Abi::Sol, "foo()"), 0xc2985578,);