PublicSquare.js

const fs = require('fs')
const Arweave = require('arweave/node')
const argv = require('yargs').argv

const arweave = Arweave.init({
    host: argv.arweaveHost ? argv.arweaveHost : 'arweave.net',
    port: argv.arweavePort ? argv.arweavePort : 443,
    protocol: argv.arweaveProtocol ? argv.arweaveProtocol : 'https'
})

async function post(msg) {
	let tx = await arweave.createTransaction({ data:msg }, wallet)

	tx.addTag('App-Name', 'PublicSquare')
	tx.addTag('Content-Type', 'text/plain')
	tx.addTag('Version', '1')
	tx.addTag('Type', 'post')

	await arweave.transactions.sign(tx, wallet)

	const response = await arweave.transactions.post(tx)

	console.log(tx)

	console.log("Transaction submission response: " + response.status)

}

if(!argv.walletFile) {
    console.log("ERROR: Please specify a wallet file to load using argument " +
        "'--wallet-file <PATH>'.")
    process.exit()
}

const raw_wallet = fs.readFileSync(argv.walletFile)
const wallet = JSON.parse(raw_wallet)

if(!argv.message) {
	console.log("Please specify a post body with --message 'Your body post.'")
}

post(argv.message)