eris-contracts-promise

Eris contracts JS

This library is built to be able to work with Eris Contracts using JS and Promises

Installation

Prerequisites

You will need ErisDB installed and running Also this library is using ES6 so you will have to use node.js > 4.0.0

Installing node module

$ npm i --save eris-contracts-promise

Getting Account data

First of all to be able to use this module you have to have your account:

• Address
• Private key
• Public key

On most of Linux based OS you will find them into ~/.eris/chains/<your-chain-name>/priv_validator.json

Usage

Finding out ErisDB IP

$ eris chains inspect <name of ErisDB server> NetworkSettings.IPAddress

After that you will be able to create new instance of library:

const ContractContent = `
  contract GetSetContract {

    uint public something;

    function setSomething(uint newSome) {
      something = newSome;
    }
  }
`

const ErisContracts = require('eris-contracts-promise')

// Your ErisRPC url
const rpcUrl = 'http://localhost:1337/rpc'
// Account details
const account = {
  address: 'someaddress',
  privKey: 'accountPrivateKey',
  pubKey: 'accountPublicKey'
}
const ContractManager = ErisContracts.newContractManager(rpcUrl, account)

/**
* You have to compile your contract before using it.
*/
const compiled = require('solc').compile(ContractContent, 1).contracts['ContractName']
const abi = JSON.parse(compiled.interface)
// Create contract instance
const SomeContract = ContractManager.newContract(abi, compiled.bytecode.toUpperCase())

// Now we could work with newly created contract
SampleContract.at('address')
  .then((contract) => {
    // And call it's functions
    return contract
      .setSomething(1)
      .then(() => {
        //new value set
      })
  })

For more information please take a look into test folder. You will find more examples in there.