qortal-ui/qortal-ui-crypto/api/registerUsername.js

/**
 * Not to be confused with register name...this is a special use case
 */
import { request, createTransaction, processTransaction } from './api.js'

const TX_TYPE = 3 // NAME_REGISTRATION
const CHECK_LAST_REF_INTERVAL = 30 * 1000 // err 30 seconds

const pendingAddresses = {}

const checkLastRefs = () => {
	Object.entries(pendingAddresses).forEach(([address, fn]) => {
		request('addresses/lastreference/' + address).then(res => {
			if (res === 'false') return
			fn(res)
			delete pendingAddresses[address]
			clearInterval(lastRefInterval)
		})
	})
}

const lastRefInterval = setInterval(() => checkLastRefs(), CHECK_LAST_REF_INTERVAL)

const callOnLastRef = (address, fn) => {
	pendingAddresses[address] = fn
}

export const registerUsername = async ({ name, address, lastRef, keyPair }) => {
	callOnLastRef(address, lastreference => {
		const txBytes = createTransaction(TX_TYPE, keyPair, {
			registrantPublicKey: keyPair.publicKey,
			registrantAddress: address,
			name,
			value: address,
			lastReference: lastreference
		})
		processTransaction(txBytes).then(res => { })
	})
}