Run CosmWasm in JavaScript
THIS IS STILL UNDER DEVELOPMENT! Contributions are welcome.
NOTE: This was built for Terra-specific applications and thus is only supported for CosmWasm v0.16. However, this implementation probably can be easily adapted to support CosmWasm v1.0+.
This package implements a pure JavaScript (no Rust bindings / WASM needed) VM capable of executing compiled CosmWasm .wasm binaries in environments such as Node.js and compatible web browsers.
Setup
Add the cosmwasm-vm package as a dependency in your package.json.
npm install -S cosmwasm-vm
or
yarn add cosmwasm-vm
Usage
Please refer to the test in this repository for an example. I include a test contract based on cosmwasm/cw-template that has been augmented with additional ExecuteMsg variants for testing the various WASM imports.
yarn
yarn test
import { CosmWasmVM } from '../src';
import { readFileSync } from 'fs';
const wasm_byte_code = readFileSync('./cosmwasm_vm_test.wasm');
const vm = new CosmWasmVM(wasm_byte_code);
const mock_env = {
block: {
height: 1,
time: '2000000000',
chain_id: 'columbus-5',
},
contract: {
address: 'contract',
},
};
const mock_info = {
sender: 'sender',
funds: [],
};
describe('CosmWasmVM', () => {
it('instantiates', () => {
let res = vm.instantiate(mock_env, mock_info, { count: 20 });
console.log(res.json);
console.log(vm.store);
});
it('execute', () => {
let res = vm.instantiate(mock_env, mock_info, { count: 20 });
res = vm.execute(mock_env, mock_info, { increment: {} });
console.log(res.json);
console.log(vm.store);
});
});
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