Change maxPayloadSize to 65157 bytes

With multiple (max 8) parents, there is less space for payloads.

packages/tangle/payload/payload.go

@@ -10,7 +10,10 @@ import (
 
 // TODO: need to adjust the max size of the payload if we want to keep a message to 64 KB
 // MaxSize defines the maximum allowed size of a marshaled Payload (in bytes).
-const MaxSize = 65288
+// MaxPayloadSize = MaxMessageSize -
+//                    (version(1) + parentsCount(1) + parentsType(1) + maxParents(8) * 32 + issuerPK(32) +
+//                    issuanceTime(8) + seqNum(8) + nonce(8) + signature(64) = MaxMessageSize - 379 bytes = 65157
+const MaxSize = 65157
 
 // Payload represents the generic interface for an object that can be embedded in Messages of the Tangle.
 type Payload interface {