assetclient: fix wrong fee limit

Author: sputn1ck

assets/client.go

@@ -105,8 +105,12 @@ func (c *TapdClient) GetRfqForAsset(ctx context.Context,
 	expiry int64, feeLimitMultiplier float64) (
 	*rfqrpc.PeerAcceptedSellQuote, error) {
 
+	// FeeLimit is the maximum amount we are willing to pay for the payment.
+	// E.g. on a 250k sats payment we'll multiply the sat amount by 1.2.
+	// The resulting maximum amount we're willing to pay is 300k sats.
+	// The response asset amount will be for those 300k sats.
 	feeLimit, err := lnrpc.UnmarshallAmt(
-		int64(satAmount)+int64(satAmount.MulF64(feeLimitMultiplier)), 0,
+		int64(satAmount.MulF64(feeLimitMultiplier)), 0,
 	)
 	if err != nil {
 		return nil, err