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README.md

WASM Runtime

The runtime crate is a wasmtime runtime for executing WASM contracts. It leverages the component model and wit-bindgen to simplify host and guest interactions.

Development

Before running tests, you'll need to compile any contracts in the /contracts folder.

Invoking a Contract Function

This code can convert the textual representation of a contract function call to a function call within the wasmtime runtime. Parameters are listed in pairs of parameter type and paramater value.

let bytes = include_bytes!("./../../target/wasm32-unknown-unknown/release/erc20_wit.wasm");
let function_name = "construct";
let params = &["String", "Rust Coin", "String", "RustCoin"];

call_function(bytes, function_name, params)?;

Types

To conform with the WASM Component Model, the following types are supported:

  • Bool(bool)
  • S8(i8)
  • U8(u8)
  • S16(i16)
  • U16(u16)
  • S32(i32)
  • U32(u32)
  • S64(i64)
  • U64(u64)
  • Float32(f32)
  • Float64(f64)
  • Char(char)
  • String(Box)
  • List(List)
  • Record(Record)
  • Tuple(Tuple)
  • Variant(Variant)
  • Enum(Enum)
  • Union(Union)
  • Option(OptionVal)
  • Result(ResultVal)
  • Flags(Flags)