mec/src/utils/tx.js

This package helps to create multi-layer chains upon Ethereum Network. Also it provides easy to use nodejs API to any of consortium network and helps to manage all of them at the same time

const keys = require('../appStructure/keyElements.js').keyElements,
     utils = require('./utils.js');

class TX {
  constructor(application) {
    this.app = application;
  }

  use (method, input) {
    return new Promise((resolve,reject)=>{
    EXEC_PROMISE_BC_METHOD(this.app, method, input)
      .then((result)=>{ resolve(result) })
      .catch((error)=>{ reject(error) });
  });
  }
}

// add checking WTF I am trying to execute through
// OBJ ABI. It have enough data, to detect weather correct
// method or correct input is executing
let EXEC_PROMISE_BC_METHOD = (service, method, input)=>{
  return new Promise((r,e)=>{
    // console.log(keys.accounts.my());
    if(input != '') {
      service.app[method](input, { from: keys.accounts.my() }, (err,res)=>{
        if(res) {
          let abi = service.howTo(method);
          // if user pass input but it don't needs
          if(!abi.inputs.length) e(`You passed input, but this method don't need`)
          console.log(`Inputs for ${abi.name} ${abi.inputs.length}`)
          console.log(`outputs for ${abi.name} ${abi.outputs.length}`)
          if(!abi.outputs.length) r(res);
          else {
            let out = abi.outputs;
            console.log(out)
            // if only 1 element at response
            if(out.length == 1) {
              r(prepeareResponse(out[0], res));

            } else {
              // if several elements at response
              let response = [];
              for(var i=0; i<out.length; i++){
                response.push(prepeareResponse(out[i], res[i]))
              }
              r(response)
            }
          }
        } else e(err)
      });
    } else {
      service.app[method]({ from: keys.accounts.my() }, (err,res)=>{
        if(res) {
          let abi = service.howTo(method);
          // if user pass input but it don't needs
          if(abi.inputs.length) e(`You passed no input, but this method required ${service.howTo(method).inputs}`)
          console.log(`Inputs for ${abi.name} ${abi.inputs.length}`)
          console.log(`outputs for ${abi.name} ${abi.outputs.length}`)
          if(!abi.outputs.length) r(res);
          else {
            let out = abi.outputs;

            // if only 1 element at response
            if(out.length == 1) {
              r(prepeareResponse(out[0], res));

            } else {
              // if several elements at response
              let response = [];
              for(var i=0; i<out.length; i++){
                response.push(prepeareResponse(out[i], res[i]))
              }
              r(response)
            }
          }
        } else e(err)
      });
    }
  });
}

let prepeareResponse = (em, value) => {

    if(em.type.includes('uint'))
      return keys.ipc[0].toDecimal(value);

    else if(em.type.includes('bytes'))
      return utils.fromHex(value);

    else if(em.type == 'string')
      return utils.fromHex(value);

    else if(em.type == 'bool')
      return value;

    else if(em.type == 'address')
      return value;
}

module.exports = {
  TX
}