The IOTA Crypto Core FPGA protocol was design and created by Thomas Pototschnig. You can learn more about his work on his blog, the iota ecosystem, and all the pertaining git repos.
The original repo I used in this project to build the device and implement this protocol is here.
FPGA is an abbreviation for Field Programmable Gate Array and allows a user to program ASIC like devices. In other words, this device can find the appropriate nonce (do the Proof of Work) within an appropriate/realistic timeframe for a small IoT device to post transactions on the IOTA ledger.
Communication with the device is over USB via a serial port.
Thomas Pototschnig has created an even better (and smaller) version, which you can find here, and a blog about it here
If you need to debug this module use the string icc-fpga-protocol
DEBUG=icc-fpga-protocol node x# npm
npm install --save @iftt/icc-fpga-protocol
# yarn
yarn add @iftt/icc-fpga-protocolAssuming you have the device plugged in and it is appropriately programmed first find the portLocation
# mac and linux
ls /dev/tty*then creat the module
// ES6
import FpgaProtocol from '@iftt/icc-fpga-protocol'
// ES5
const FpgaProtocol = require('@iftt/icc-fpga-protocol').default
const fpgaProtocol = new FpgaProtocol('/dev/ttyUSB1') // using the default 115200 baud rate
fpga._onPortOpen = function () {
console.log('the fpgaProtocol is ready.')
}
// ask the device to do POW for you:
fpgaProtocol.attachToTangle(trunkTransaction, branchTransaction, minWeightMagnitude, trytes, callback)The standard format with the iota tangle is to push the attachToTangle forward like so:
// create IOTA instance
const IOTA = require('iota.lib.js')
const iota = new IOTA({ provider: 'https://testnet.iota.com:443' })
// create FpgaProtocol instance
const FpgaProtocol = require('iftt/icc-fpga-protocol').default
const fpgaProtocol = new FpgaProtocol('/dev/ttyUSB1')
// link the 'attachToTangle' function
iota.api.attachToTangle = (trunkTransaction, branchTransaction, minWeight, trytes, callback) => {
fpgaProtocol.attachToTangle(trunkTransaction, branchTransaction, minWeightMagnitude, trytes, callback)
}
// .. do stuffThat's it! Your device will spit out the POW to the iota api and all is well with the world. Obviously, you need to manage the queue system yourself to ensure that multiple transactions aren't trying to use either the device or the provider while another transaction is trying to go through.
- portLocation: string
where to look for the device - [baudRate]: number
defaults to 115200; the rate at which the device talks/listens
- null: void
edit this function to know when the device is ready
attachToTangle (trunkTransaction: string, branchTransaction: string, minWeightMagnitude: number, trytes: [string], callback: Function): Promise
- trunkTransaction: Hash (string)
- branchTransaction: Hash (string)
- minWeightMagnitude: number
9 for testnet; 14 for mainnet - trytes: [string]
- callback: Function
# Linux
cat /dev/urandom |tr -dc A-Z9|head -c${1:-81}
# OS X
cat /dev/urandom |LC_ALL=C tr -dc 'A-Z9' | fold -w 81 | head -n 1If you are using windows, ensure python is installed and run the examples file genRandomSeed.py OR if nodejs is installed just run the examples file keygen.js
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