rpcserver+routerrpc: remove payment limit

config.go

@@ -756,7 +756,6 @@ func ValidateConfig(cfg Config, usageMessage string) (*Config, error) {
 		// primary chain.
 		cfg.registeredChains.RegisterPrimaryChain(litecoinChain)
 		MaxFundingAmount = maxLtcFundingAmount
-		MaxPaymentMSat = maxLtcPaymentMSat
 
 	case cfg.Bitcoin.Active:
 		// Multiple networks can't be selected simultaneously.  Count

lnrpc/routerrpc/router_backend.go

@@ -27,9 +27,6 @@ import (
 // RouterBackend contains the backend implementation of the router rpc sub
 // server calls.
 type RouterBackend struct {
-	// MaxPaymentMSat is the largest payment permitted by the backend.
-	MaxPaymentMSat lnwire.MilliSatoshi
-
 	// SelfNode is the vertex of the node sending the payment.
 	SelfNode route.Vertex
 
@@ -143,10 +140,6 @@ func (r *RouterBackend) QueryRoutes(ctx context.Context,
 	if err != nil {
 		return nil, err
 	}
-	if amt > r.MaxPaymentMSat {
-		return nil, fmt.Errorf("payment of %v is too large, max payment "+
-			"allowed is %v", amt, r.MaxPaymentMSat.ToSatoshis())
-	}
 
 	// Unmarshall restrictions from request.
 	feeLimit := lnrpc.CalculateFeeLimit(in.FeeLimit, amt)
@@ -489,13 +482,6 @@ func (r *RouterBackend) UnmarshallRoute(rpcroute *lnrpc.Route) (
 			return nil, err
 		}
 
-		if routeHop.AmtToForward > r.MaxPaymentMSat {
-			return nil, fmt.Errorf("payment of %v is too large, "+
-				"max payment allowed is %v",
-				routeHop.AmtToForward,
-				r.MaxPaymentMSat.ToSatoshis())
-		}
-
 		hops[i] = routeHop
 
 		prevNodePubKey = routeHop.PubKeyBytes

lnrpc/routerrpc/router_backend_test.go

@@ -186,7 +186,6 @@ func testQueryRoutes(t *testing.T, useMissionControl bool, useMsat bool) {
 	}
 
 	backend := &RouterBackend{
-		MaxPaymentMSat: lnwire.NewMSatFromSatoshis(1000000),
 		FindRoute: findRoute,
 		SelfNode:  route.Vertex{1, 2, 3},
 		FetchChannelCapacity: func(chanID uint64) (

lntest/itest/lnd_multi-hop-error-propagation.go

@@ -4,6 +4,7 @@ package itest
 
 import (
 	"context"
+	"math"
 	"strings"
 	"time"
 
@@ -260,7 +261,7 @@ out:
 		// We'll send in chunks of the max payment amount. If we're
 		// about to send too much, then we'll only send the amount
 		// remaining.
-		toSend := int64(lnd.MaxPaymentMSat.ToSatoshis())
+		toSend := int64(math.MaxUint32)
 		if toSend+amtSent > amtToSend {
 			toSend = amtToSend - amtSent
 		}

rpcserver.go

@@ -70,23 +70,7 @@ import (
 	"gopkg.in/macaroon-bakery.v2/bakery"
 )
 
-const (
-	// maxBtcPaymentMSat is the maximum allowed Bitcoin payment currently
-	// permitted as defined in BOLT-0002.
-	maxBtcPaymentMSat = lnwire.MilliSatoshi(math.MaxUint32)
-
-	// maxLtcPaymentMSat is the maximum allowed Litecoin payment currently
-	// permitted.
-	maxLtcPaymentMSat = lnwire.MilliSatoshi(math.MaxUint32) *
-		btcToLtcConversionRate
-)
-
 var (
-	// MaxPaymentMSat is the maximum allowed payment currently permitted as
-	// defined in BOLT-002. This value depends on which chain is active.
-	// It is set to the value under the Bitcoin chain as default.
-	MaxPaymentMSat = maxBtcPaymentMSat
-
 	// readPermissions is a slice of all entities that allow read
 	// permissions for authorization purposes, all lowercase.
 	readPermissions = []bakery.Op{
@@ -540,7 +524,6 @@ func newRPCServer(cfg *Config, s *server, macService *macaroons.Service,
 	}
 	graph := s.chanDB.ChannelGraph()
 	routerBackend := &routerrpc.RouterBackend{
-		MaxPaymentMSat: MaxPaymentMSat,
 		SelfNode: selfNode.PubKeyBytes,
 		FetchChannelCapacity: func(chanID uint64) (btcutil.Amount,
 			error) {
@@ -3987,18 +3970,6 @@ func (r *rpcServer) extractPaymentIntent(rpcPayReq *rpcPaymentRequest) (rpcPayme
 		return payIntent, err
 	}
 
-	// Currently, within the bootstrap phase of the network, we limit the
-	// largest payment size allotted to (2^32) - 1 mSAT or 4.29 million
-	// satoshis.
-	if payIntent.msat > MaxPaymentMSat {
-		// In this case, we'll send an error to the caller, but
-		// continue our loop for the next payment.
-		return payIntent, fmt.Errorf("payment of %v is too large, "+
-			"max payment allowed is %v", payIntent.msat,
-			MaxPaymentMSat)
-
-	}
-
 	return payIntent, nil
 }