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128 lines
2.6 KiB
Go
128 lines
2.6 KiB
Go
package ln
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import (
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"strings"
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"git.sp4ke.com/sp4ke/bit4sat/btc"
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"git.sp4ke.com/sp4ke/bit4sat/bus"
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"git.sp4ke.com/sp4ke/bit4sat/db"
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"git.sp4ke.com/sp4ke/bit4sat/lndrpc"
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"git.sp4ke.com/sp4ke/bit4sat/utils"
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"github.com/mediocregopher/radix/v3"
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)
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var (
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Client *http.Client
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)
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// Quick check if invoice was paid
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func CheckInvoice(id string) (*Invoice, error) {
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lnInvoice, err := lndrpc.LookupInvoiceRhashStr(id)
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if err != nil {
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return nil, err
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}
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invoice := InvoiceFromLndIn(lnInvoice)
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return invoice, nil
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}
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// This will watch on the pubsub for paid invoices given an invoice id
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func PollPaidInvoice(invoiceId string, invoicePaidChan chan<- *Invoice, errorChan chan<- error) {
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defer func() {
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log.Printf("quitting poller %s", invoiceId)
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}()
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watchPaidChannel := make(chan radix.PubSubMessage)
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busName := fmt.Sprintf("%s:%s", bus.InvoicePaidChannelPrefix, invoiceId)
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err := db.DB.RedisPubSub.Subscribe(watchPaidChannel, busName)
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if err != nil {
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log.Printf("error in poll invoice: %s", err)
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errorChan <- err
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return
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}
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log.Printf("poller: %s, listening to watchPaidChannel", invoiceId)
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for msg := range watchPaidChannel {
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log.Printf("poller received message on %s", msg.Channel)
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split := strings.Split(msg.Channel, ":")
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if len(split) != 2 {
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errorChan <- fmt.Errorf("error in pubsub channel parsing %s", msg.Channel)
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}
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targetInvoiceId := strings.Split(msg.Channel, ":")[1]
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log.Printf("target invoice is %s", targetInvoiceId)
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if targetInvoiceId == invoiceId {
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invoice := Invoice{}
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err := json.Unmarshal(msg.Message, &invoice)
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if err != nil {
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errorChan <- err
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return
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}
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invoicePaidChan <- &invoice
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close(invoicePaidChan)
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return
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}
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}
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}
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type InvoiceOpts struct {
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Amount float64
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Curr Currency
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Memo string
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}
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func NewInvoice(opts InvoiceOpts) (*Invoice, error) {
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var err error
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var satValue int64
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if opts.Curr == CurMSat {
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log.Println("cur is msat")
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// Convert to MSAT, meaning values under 1000 MSAT are ignored
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satValue = int64(opts.Amount / 1000)
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// Other supported currecies
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}
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if opts.Curr != CurSat {
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log.Println("cur is custom")
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// Get Sat satValue for this invoice
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msatVal, err := btc.FiatToMsat(CurrencyString[opts.Curr], opts.Amount)
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if err != nil {
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return nil, err
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}
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satValue = msatVal / 1000
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} else {
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satValue = int64(opts.Amount)
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}
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lndInvoice, err := lndrpc.AddInvoiceSat(opts.Memo, satValue)
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if err != nil {
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return nil, err
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}
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invoice := InvoiceFromLndIn(lndInvoice)
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invoice.QuotedCurrency = CurrencyString[opts.Curr]
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invoice.QuotedAmount = opts.Amount
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return invoice, nil
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}
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func init() {
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Client = utils.NewHttpClient()
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}
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