IOTA Lib

This project is a library (wrapper around IOTA) ot integrate with FIWARE.

Background

FIWARE is an open source initiative defining a universal set of standards for context data management which facilitate the development of Smart Solutions for different domains such as Smart Cities, Smart Industry, Smart Agrifood, and Smart Energy. IOTA is an open-source distributed ledger that is being built to power the future of the Internet of Things with feeless microtransactions and data integrity for machines. This library is an intial library(wrapper around IOTA libs) to support FIWARE Ecosystem.

Installation

npm install --save iota-lib

Functions

getProvider() ⇒ string

get the url of the provider Returns: string - endpoint of the provider

getTcpProvider() ⇒ string

get the url of Tcp provider (zmq endpoint) Returns: string- endpoint of the provider

setProvider()

set a new provider instead default

https://nodes.devnet.thetangle.org:443

setTcpProvider()

set TcpProvider instead default (zmq endpoint)

tcp://zmq.devnet.iota.org:5556

getNodeInfo() ⇒ Promise

get the information about the node Returns: Promise - callback with Object, Object if any

createMamTransaction(data, [options]) ⇒ Promise

Create MaM transaction Returns: Promise - callback with Object, Object if any

Param	Type	Default	Description
data	string		data to be submitted in iota
[options]	object	{ mode : public }	(optional) for restricted options = {mode: restricted, secret: value}

fetchMamTransaction(hash, mode, secret) ⇒ Promise

Fetch MaM transaction Returns: Promise - callback with Object, Object if any

Param	Type	Description
hash	string	hash to be fetched
mode	string	mode could be either public or restricted
secret	string	secret of the data in case of restricted mode only

createTransaction(address, seed, message, tag) ⇒ Promise

Create a transaction

Returns: Promise - callback with Object, Object if any

Param	Type	Description
address	string	address of the user
seed	string	seed belong to the address to create transaction
message	string	value to be put in transation
tag	string	(optional) tag

fetchTransaction(address) ⇒ Promise

fetch transactions belongs to specific address

Returns: Promise - callback with Object, Object if any

Param	Type	Description
address	string	address of the user

statusTransaction(transactions) ⇒ Promise

status of the transactions

Returns: Promise - callback with Object, Object if any

Param	Type	Description
transactions	Array	transaction Hash

confirmTransaction(transactions) ⇒ Promise

confirm of the transaction mannually (if any conflict)

Returns: Promise - callback with Object, Object if any

Param	Type	Description
transactions	Array	transaction Hash

generateSeed() ⇒ string

Create a new seed

Returns: string - generated seed

createNewAddress(seed, [options]) ⇒ Promise

Create a new address

Returns: Promise - callback with Object, Object if any

Param	Type	Default	Description
seed	string		seed to be use to create a new account
[options]	Object	{index: 0, security: 2}	(optional) options, same address will be derived if seed, index and secuity is same

getBalance(address) ⇒ Promise

get balance of the account

Returns: Promise - callback with Object, Object if any

Param	Type	Description
address	string	address

sortTransactionMessage(transaction) ⇒ Array

sort transaction messages

Returns: Array - sorted transactions

Param	Type	Description
transaction	Array	transactions

decodeMessage(encodedMessage) ⇒ string

decode encoded message

Returns: string - decoded message

Param	Type	Description
encodedMessage	string	encoded Message

encodeMessage(decodedMessage) ⇒ string

encode decoded message

Returns: string - encoded message

Param	Type	Description
decodedMessage	string	decoded Message

Usages

set of possible operations:

Get the information of the node

import { getNodeInfo } from "iota-lib";
 
getNodeInfo()
    .then(res => {
        console.log(`res is${JSON.stringify(res)}`);
    })
    .catch(err => {
        console.log(`err${JSON.stringify(err)}`);
    });

Create a new account

create of an account followed up with 2 steps: 1. create a new seed (you can also skip this step by using your existing seed) 2. calling a create new account function

import { generateSeed, createNewAddress } from "iota-lib";
//generate a new seed
const seed = generateSeed();
//create a new account
createNewAddress(seed)
    .then(res => {
        console.log(`address is:${res}`);
    })
    .catch(err => {
        console.log(`err is:${err}`);
    });

Create a new Transaction

create of an account followed up with 2 steps: 1. create a new seed (you can also skip this step by using your existing seed) 2. calling a create new account function

import { generateSeed, createNewAddress } from "iota-lib";
//generate a new seed
const seed = generateSeed();
//create a new account
createNewAddress(seed)
    .then(res => {
        console.log(`address is:${res}`);
    })
    .catch(err => {
        console.log(`err is:${err}`);
    });

Fetch any Transaction

import { fetchTransaction } from "iota-lib";
fetchTransaction("HEQLOWORLDHELLOWORLDHELLOWORLDHELLOWORLDHELLOWORLDHELLOWORLDHELLOWORLDHELLOWOR99D")
    .then(res => {
        console.log(`response is :${JSON.stringify(res)}`);
    })
    .catch(err => {
        console.log(`err is :${JSON.stringify(err)}`);
    });

Status of any Transaction

import { statusTransaction } from "iota-lib";
 
statusTransaction(["VDEVCBMSEUTOJNWSBCRQHJWAWXZCTFYUGFZXEPCFUVXQHEPQNL9I9BMMVFTUFTDEPRHRGPAIRAOVKQ999"])
    .then(res => {
        console.log(`response is :${JSON.stringify(res)}`);
    })
    .catch(err => {
        console.log(`err is :${JSON.stringify(err)}`);
    });

Create a MaM Transaction (public)

import { createMamTransaction } from "iota-lib";
 
createMamTransaction("test")
    .then(re => {
        console.log(`re is${JSON.stringify(re)}`);
    })
    .catch(er => {
        console.log(`er is${JSON.stringify(er)}`);
    });

Create a MaM Transaction (private)

import { createMamTransaction } from "iota-lib";
 
createMamTransaction("test", { mode: "restricted", secret: "1234" })
    .then(re => {
        console.log(`re is${JSON.stringify(re)}`);
    })
    .catch(er => {
        console.log(`er is${JSON.stringify(er)}`);
    });

Fetch a MaM Transaction (public)

import { fetchMamTransaction, decodeMessage } from "iota-lib";
 
fetchMamTransaction(
    "9QBGGEEYGPNRZ9NQYBIVBNRJVPXWJUFHTKSRHOJZTNNKOBPBWGSXD9QRABWFDNP9VDOCRVHEIDPOWIUWC",
    "public",
    null,
    res => {
        const msg = decodeMessage(res);
        console.log(`message${msg}`);
    }
);

Fetch a MaM Transaction (private)

import { fetchMamTransaction, decodeMessage } from "iota-lib";
 
fetchMamTransaction(
    "QQUTOYQDKWGEOSNDERIUTLNFJLKXKPGMZVDJJJNPMSXSIYHJDUUMZUEI9GGQSFQJD9GRVGCMNDDATPWDN",
    "restricted",
    "DONTSHARETHIS",
    res => {
        const msg = decodeMessage(res);
        console.log(`message${msg}`);
    }
);

Pending (implementation)

1. getBalance
2. confirmTransaction
3. Test-Case

License

MIT © 2020 FIWARE Foundation e.V.