Expand description
Defines primitive types for creating or validating a parachain.
When compiled with standard library support, this crate exports a wasm
module that can be used to validate parachain WASM.
§Parachain WASM
Polkadot parachain WASM is in the form of a module which imports a memory
instance and exports a function validate_block
.
validate
accepts as input two i32
values, representing a pointer/length pair
respectively, that encodes ValidationParams
.
validate
returns an u64
which is a pointer to an u8
array and its length.
The data in the array is expected to be a SCALE encoded
ValidationResult
.
ASCII-diagram demonstrating the return data format:
[pointer][length]
32bit 32bit
^~~ returned pointer & length
The wasm-api (enabled only when std
feature is not enabled and wasm-api
feature is enabled)
provides utilities for setting up a parachain WASM module in Rust.
Modules§
- Primitive types which are strictly necessary from a parachain-execution point of view.