Upload code

If you need to load the program code into the chain without initialization use GearApi.code.upload method to create upload_code extrinsic:

const code = fs.readFileSync('path/to/program.opt.wasm');

const { codeHash } = await api.code.upload(code);

api.code.signAndSend(alice, () => {
  events.forEach(({ event: { method, data } }) => {
    if (method === 'ExtrinsicFailed') {
      throw new Error(data.toString());
    } else if (method === 'CodeChanged') {
      console.log(data.toHuman());
    }
  });
});

Create program from uploaded code on chain

Use api.program.create method to create create_program extrinsic:

const codeId = '0x…';

const program = {
  codeId,
  gasLimit: 1000000,
  value: 1000,
  initPayload: somePayload,
};

const { programId, salt, extrinsic } = api.program.create(program, meta);

await extrinsic.signAndSend(keyring, (event) => {
  console.log(event.toHuman());
});