api-test.js

const request = require('request');

const { OPCODE_MAP } = require('./interpreter');
const { STOP, ADD, PUSH, STORE, LOAD } = OPCODE_MAP;

const BASE_URL = 'http://localhost:3000';

const postTransact = ({ code, to, value, gasLimit }) => {
    return new Promise((resolve, reject) => {
        request(`${BASE_URL}/account/transact`, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ code, to, value, gasLimit })
            }, (error, response, body) => {
            return resolve(JSON.parse(body));
        });
    });
}


const getMine = () => {
    return new Promise((resolve, reject) => {
        setTimeout(() => {
            request(`${BASE_URL}/blockchain/mine`, (error, response, body) => {
                return resolve(JSON.parse(body));
            });
        }, 1000);
    });
}

const getAccountBalance = ({ address } = {}) => {
    return new Promise((resolve, reject) => {
        request(
            `${BASE_URL}/account/balance` + (address ? `?address=${address}` : ''),
            (error, response, body) => {
                return resolve(JSON.parse(body));
        });
    })
}

let toAccountData;
let smartContractAccountData

postTransact({})    
    .then(postTransactionResponse => {
        console.log(
            'postTransactionResponse (Create Account Transaction)', 
            postTransactionResponse
        );

        toAccountData = postTransactionResponse.transaction.data.accountData;

        return getMine();
    }).then(getMineResponse => {
        console.log('getMineResponse', getMineResponse);

        return postTransact({ to: toAccountData.address, value: 20 });
    })
    .then(postTransactionResponse2 => {
        console.log('postTransactionResponse2 (Standard Transaction)', postTransactionResponse2);

        const key = 'foo';
        const value = 'bar'

        const code = [PUSH, value, PUSH, key, STORE, PUSH, key, LOAD, STOP];

        return postTransact({ code });
    })
    .then(postTransactionResponse3 => {
        console.log('postTransactResponse3 (Smart Contract)', postTransactionResponse3);

        smartContractAccountData = postTransactionResponse3.transaction.data.accountData;

        return getMine();
    })
    .then(getMineResponse2 => {
        console.log('getMineResponse2', getMineResponse2);

        return postTransact({
            to: smartContractAccountData.codeHash,
            value: 0,
            gasLimit: 100
        })
    })
    .then(postTransactionResponse4 => {
        console.log('postTransactResponse (to the Smart Contract)', postTransactionResponse4);

        return getMine();
    })
    .then(getMineResponse3 => {
        console.log('getMineResponse3', getMineResponse3);
        return getAccountBalance();
    })
    .then(getAccountBalanceResponse => {
        console.log('getAccountBalanceResponse', getAccountBalanceResponse);

        return getAccountBalance({ address: toAccountData.address });
    })
    .then(getAccountBalanceResponse2 => {
        console.log('getAccountBalanceResponse2', getAccountBalanceResponse2);
    });