44 lines
1.7 KiB
JavaScript
44 lines
1.7 KiB
JavaScript
import { msatsSatsFloor, msatsToSats, satsToMsats } from '@/lib/format'
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import { createWithdrawal } from '@/api/resolvers/wallet'
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import { createInvoice } from 'wallets/server'
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export async function autoWithdraw ({ data: { id }, models, lnd }) {
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const user = await models.user.findUnique({ where: { id } })
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if (user.autoWithdrawThreshold === null || user.autoWithdrawMaxFeePercent === null) return
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const threshold = satsToMsats(user.autoWithdrawThreshold)
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const excess = Number(user.msats - threshold)
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// excess must be greater than 10% of threshold
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if (excess < Number(threshold) * 0.1) return
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// floor fee to nearest sat but still denominated in msats
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const maxFeeMsats = msatsSatsFloor(Math.ceil(excess * (user.autoWithdrawMaxFeePercent / 100.0)))
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// msats will be floored by createInvoice if it needs to be
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const msats = BigInt(excess) - maxFeeMsats
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// must be >= 1 sat
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if (msats < 1000n) return
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// check that
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// 1. the user doesn't have an autowithdraw pending
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// 2. we have not already attempted to autowithdraw this fee recently
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const [pendingOrFailed] = await models.$queryRaw`
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SELECT EXISTS(
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SELECT *
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FROM "Withdrawl"
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WHERE "userId" = ${id}
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AND "autoWithdraw"
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AND status IS DISTINCT FROM 'CONFIRMED'
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AND now() < created_at + interval '1 hour'
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AND "msatsFeePaying" >= ${maxFeeMsats}
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)`
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if (pendingOrFailed.exists) return
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const { invoice, wallet } = await createInvoice(id, { msats, description: 'SN: autowithdrawal', expiry: 360 }, { models })
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return await createWithdrawal(null,
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{ invoice, maxFee: msatsToSats(maxFeeMsats) },
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{ me: { id }, models, lnd, walletId: wallet.id })
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}
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