64 lines
2.0 KiB
JavaScript
64 lines
2.0 KiB
JavaScript
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import { lnAddrOptions } from './lnurl'
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import { lnAddrSchema, ssValidate } from './validate'
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export async function fetchLnAddrInvoice ({ addr, amount, maxFee, comment, ...payer },
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{
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me, models, lnd, autoWithdraw = false,
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lnService: { decodePaymentRequest, getIdentity }
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}) {
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const options = await lnAddrOptions(addr)
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await ssValidate(lnAddrSchema, { addr, amount, maxFee, comment, ...payer }, options)
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if (payer) {
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payer = {
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...payer,
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identifier: payer.identifier ? `${me.name}@stacker.news` : undefined
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}
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payer = Object.fromEntries(
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Object.entries(payer).filter(([, value]) => !!value)
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)
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}
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const milliamount = 1000 * amount
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const callback = new URL(options.callback)
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callback.searchParams.append('amount', milliamount)
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if (comment?.length) {
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callback.searchParams.append('comment', comment)
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}
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let stringifiedPayerData = ''
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if (payer && Object.entries(payer).length) {
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stringifiedPayerData = JSON.stringify(payer)
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callback.searchParams.append('payerdata', stringifiedPayerData)
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}
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// call callback with amount and conditionally comment
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const res = await (await fetch(callback.toString())).json()
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if (res.status === 'ERROR') {
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throw new Error(res.reason)
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}
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// decode invoice
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try {
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const decoded = await decodePaymentRequest({ lnd, request: res.pr })
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const ourPubkey = (await getIdentity({ lnd })).public_key
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if (autoWithdraw && decoded.destination === ourPubkey && process.env.NODE_ENV === 'production') {
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// unset lnaddr so we don't trigger another withdrawal with same destination
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await models.wallet.deleteMany({
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// TODO: replace hardcoded 'LIGHTNING_ADDRESS' with wallet.type
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where: { userId: me.id, type: 'LIGHTNING_ADDRESS' }
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})
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throw new Error('automated withdrawals to other stackers are not allowed')
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}
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if (!decoded.mtokens || BigInt(decoded.mtokens) !== BigInt(milliamount)) {
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throw new Error('invoice has incorrect amount')
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}
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} catch (e) {
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console.log(e)
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throw e
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}
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return res
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}
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