67 lines
2 KiB
Go
67 lines
2 KiB
Go
package lnd
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import (
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"context"
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b64 "encoding/base64"
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"encoding/hex"
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"errors"
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"fmt"
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"strconv"
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"time"
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"git.minhas.io/asara/well-goknown/config"
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"git.minhas.io/asara/well-goknown/logger"
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"git.minhas.io/asara/well-goknown/redis"
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"github.com/lightninglabs/lndclient"
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"github.com/lightningnetwork/lnd/lnrpc"
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)
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func Request(rKey string) (string, error) {
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l := logger.Get()
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ctx := context.TODO()
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// connect to lnd
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// TODO: move to its own function and don't connect on every request
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macaroon := config.GetConfig().LndMacaroonHex
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addr := config.GetConfig().LndAddr
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dec, _ := b64.StdEncoding.DecodeString(config.GetConfig().LndCertB64)
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lndCert := string(dec)
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lndCli, err := lndclient.NewBasicClient(addr, "", "", "bitcoind", lndclient.MacaroonData(macaroon), lndclient.TLSData(lndCert))
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if err != nil {
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l.Fatal().Msg("unable to connect to lnd")
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}
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// add invoice
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addrFee, err := strconv.ParseInt(config.GetConfig().NostrAddrFee, 10, 64)
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if err != nil {
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l.Fatal().Msg("nostr address fee not set properlly")
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return "", errors.New("internal server error")
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}
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expiryInMin := int64(5)
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invoice, err := lndCli.AddInvoice(ctx, &lnrpc.Invoice{
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Memo: fmt.Sprintf("nostr addr %s", rKey),
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Expiry: expiryInMin * 60,
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Value: addrFee,
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})
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if err != nil {
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l.Fatal().Msg("unable to create lnd invoice")
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return "", errors.New("internal server error")
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}
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// add a minute to the expiry time to ensure entries aren't removed from redis before they are expired
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expiryTime := time.Now().Local().Add(time.Minute * time.Duration(expiryInMin+1)).Unix()
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paymentReq := invoice.PaymentRequest
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rHash := hex.EncodeToString(invoice.RHash)
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// write lnd request to redis
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redisCli := redis.LndRedisConn.Client
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err = redisCli.Set(ctx, rKey, fmt.Sprintf("%d:%s:%s", expiryTime, rHash, paymentReq), 0).Err()
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if err != nil {
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l.Error().Msg("unable to connect to redis when writing lnd request")
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return "", errors.New("unable to make the request, please try again")
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}
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return paymentReq, nil
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}
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