How to implement "cleos push action" in Node.js via RPC or eosjs?

Question

I'm working on Todos example in the following link. To Do list smart contract

By using cleos utility, everything works fine.

Now, I'm trying to access the smart contract with Node.js RPC.

How can I implement the following functionalities with Node.js RPC?

$ cleos --wallet-url http://172.18.0.1:8899 -u http://172.18.0.1:8888 push action shlee create '["shlee", 2, "feed dog"]' -p shlee

Basically, I'd like to know how to implement push action command of cleos utility.

Will the following API work?

http://127.0.0.1:8888/v1/chain/push_block

Answer 1

Here is my final code that is working ...

Thank you leettamna

const { Api, JsonRpc, RpcError, JsSignatureProvider } = require('eosjs');
const fetch = require('node-fetch');                            // node only; not needed in browsers
const { TextDecoder, TextEncoder } = require('text-encoding');  // node, IE11 and IE Edge Browsers

const defaultPrivateKey = "5JUKRhWkNobtgSJSamcY2Yz4dpbAzZ3euTYK2d7rWUP118xyRiG"; // user shlee
const signatureProvider = new JsSignatureProvider([defaultPrivateKey]);

const rpc = new JsonRpc(' http://172.18.0.1:8888', { fetch });

const api = new Api({ rpc, signatureProvider, textDecoder: new TextDecoder(), textEncoder: new TextEncoder() });

try {
(async () => {
  const result = await api.transact({
    actions: [{
      account: 'shlee',
      name: 'create',
      authorization: [{
        actor: 'shlee',
        permission: 'active',
      }],
      data: {
        author: 'shlee',
        id: 4,
        description: "feed dog",
      },
    }]
  }, {
    blocksBehind: 3,
    expireSeconds: 30,
  });
  console.log(result);
})();
} catch (e) {
  console.log('\nCaught exception: ' + e);
  if (e instanceof RpcError)
    console.log(JSON.stringify(e.json, null, 2));
}

Answer 2

Try 'eosjs'.

It is official javascript eos rpc library.

repository has simple example. https://github.com/EOSIO/eosjs

modify defaultPrivateKey = "shlee_private_key",
and parameter1 ~ parameter3 to correct parameter name
and http://127.0.0.1:8000 to your node api endpoint

const { Api, JsonRpc, RpcError, JsSignatureProvider } = require('eosjs');
const fetch = require('node-fetch');                            // node only; not needed in browsers
const { TextDecoder, TextEncoder } = require('text-encoding');  // node, IE11 and IE Edge Browsers

const defaultPrivateKey = "5JtUScZK2XEp3g9gh7F8bwtPTRAkASmNrrftmx4AxDKD5K4zDnr"; // useraaaaaaaa
const signatureProvider = new JsSignatureProvider([defaultPrivateKey]);

const rpc = new JsonRpc('http://127.0.0.1:8000', { fetch });

(async () => {
  const result = await api.transact({
    actions: [{
      account: 'shlee',
      name: 'create',
      authorization: [{
        actor: 'shlee',
        permission: 'active',
      }],
      data: {
        parameter1_name: 'shlee',
        parameter2_name: 2,
        parameter3_name: "feed dog",
      },
    }]
  }, {
    blocksBehind: 3,
    expireSeconds: 30,
  });
  console.dir(result);
})();