nip60: fix spending conditions over SendExternal() and SendInternal()

nip60/send-internal.go

@@ -0,0 +1,64 @@
+package nip60
+
+import (
+	"context"
+	"fmt"
+
+	"fiatjaf.com/nostr"
+	"fiatjaf.com/nostr/nip60/client"
+	"github.com/elnosh/gonuts/cashu"
+)
+
+func (w *Wallet) SendInternal(ctx context.Context, amount uint64, opts SendOptions) (cashu.Proofs, string, error) {
+	if w.PublishUpdate == nil {
+		return nil, "", fmt.Errorf("can't do write operations: missing PublishUpdate function")
+	}
+
+	w.tokensMu.Lock()
+	defer w.tokensMu.Unlock()
+
+	chosen, _, err := w.getProofsForSending(ctx, amount, opts.SpecificSourceMint, nil)
+	if err != nil {
+		return nil, "", err
+	}
+
+	if opts.Hashlock != [32]byte{} {
+		if info, err := client.GetMintInfo(ctx, chosen.mint); err != nil || !info.Nuts.Nut14.Supported {
+			return nil, chosen.mint, fmt.Errorf("mint doesn't support htlc: %w", err)
+		}
+	} else if opts.P2PK != nil {
+		if info, err := client.GetMintInfo(ctx, chosen.mint); err != nil || !info.Nuts.Nut11.Supported {
+			return nil, chosen.mint, fmt.Errorf("mint doesn't support p2pk: %w", err)
+		}
+	}
+
+	swapSettings := swapSettings{
+		spendingCondition: opts.asSpendingCondition(w.PublicKey),
+	}
+
+	// get new proofs
+	proofsToSend, changeProofs, err := w.swapProofs(ctx, chosen.mint, chosen.proofs, amount, swapSettings)
+	if err != nil {
+		return nil, chosen.mint, err
+	}
+
+	he := HistoryEntry{
+		event:           &nostr.Event{},
+		TokenReferences: make([]TokenRef, 0, 5),
+		createdAt:       nostr.Now(),
+		In:              false,
+		Amount:          chosen.proofs.Amount() - changeProofs.Amount(),
+	}
+
+	if err := w.saveChangeAndDeleteUsedTokens(ctx, chosen.mint, changeProofs, chosen.tokenIndexes, &he); err != nil {
+		return nil, chosen.mint, err
+	}
+
+	w.Lock()
+	if err := he.toEvent(ctx, w.kr, he.event); err == nil {
+		w.PublishUpdate(*he.event, nil, nil, nil, true)
+	}
+	w.Unlock()
+
+	return proofsToSend, chosen.mint, nil
+}