My first contract

This is an example contract being used in the docs. You can read more about it here

This workspace consists of two members:

my-first-contract/
├─ contract/     # The smart contract (WASM target)
└─ data-driver/  # JSON <-> RKYV translator (WASM target for frontends/indexers)

Prerequisites

• Rustup
• make
• Wasm-pack
• Wasm-tools

cargo install --locked wasm-pack
cargo install --locked --version 1.207.0 wasm-tools

Build everything

make

Artifacts

• Contract WASM: ./target/wasm32-unknown-unknown/release/my_first_contract.wasm
• Data‑driver WASM: ./target/wasm32-unknown-unknown/release/my_first_contract_dd.wasm

What each member does

contract/

A minimal counter contract with three calls:

• read_value: input () → output u32
• increment: input () → output ()
• init: input u32 → output ()

data-driver/

A WASM library that converts JSON <-> RKYV bytes for the contract’s ABI surface.

• Functions
  • read_value: input (); output u32
  • increment: input (); output ()
  • init: input u32; output ()
• Events
  • INIT: payload u32

The driver is no_std and exports an FFI suitable for JS host code (see features = "js" build).