send.ts

import { LNMarketsRest } from '@ln-markets/api'

interface SendArgs {
	type: 'bolt11' | 'on-chain'
	address: string
	amountSats: number
	lnmarkets: LNMarketsRest
}

export async function send({ type, address, amountSats, lnmarkets }: SendArgs) {
	if (type === 'bolt11') {
		await lnmarkets.withdraw({
			amount: amountSats,
			invoice: address,
		})
		return
	}

	if (type === 'on-chain') {
		// Withdraw on-chain using a deezy swap.
		const url = `https://api${
			lnmarkets.network === 'testnet' ? '-testnet' : ''
		}.deezy.io/v1/swap`
		const result = await fetch(url, {
			method: 'post',
			body: JSON.stringify({
				amount_sats: amountSats,
				on_chain_address: address,
				on_chain_sats_per_vbyte: 1, // TODO: realtime estimate
			}),
		})
			.then(response => response.json() as Promise<{ bolt11_invoice: string }>)
			.catch(err => {
				console.log(err)
				return null
			})

		if (result == null) {
			return
		}

		const { bolt11_invoice } = result
		await lnmarkets.withdraw({ invoice: bolt11_invoice })
		return
	}
}