Merge pull request lightningdevkit#4046 from valentinewallace/2025-08-async-sender

Async send: sender-side

Author: TheBlueMatt

fuzz/src/full_stack.rs

@@ -1048,7 +1048,7 @@ fn two_peer_forwarding_seed() -> Vec<u8> {
 	// our network key
 	ext_from_hex("0100000000000000000000000000000000000000000000000000000000000000", &mut test);
 	// config
-	ext_from_hex("000000000090000000000000000064000100000000000100ffff0000000000000000ffffffffffffffffffffffffffffffff0000000000000000ffffffffffffffff000000ffffffff00ffff1a000400010000020400000000040200000a08ffffffffffffffff000100000000", &mut test);
+	ext_from_hex("000000000090000000000000000064000100000000000100ffff0000000000000000ffffffffffffffffffffffffffffffff0000000000000000ffffffffffffffff000000ffffffff00ffff1a000400010000020400000000040200000a08ffffffffffffffff0001000000000000", &mut test);
 
 	// new outbound connection with id 0
 	ext_from_hex("00", &mut test);
@@ -1502,7 +1502,7 @@ fn gossip_exchange_seed() -> Vec<u8> {
 	// our network key
 	ext_from_hex("0100000000000000000000000000000000000000000000000000000000000000", &mut test);
 	// config
-	ext_from_hex("000000000090000000000000000064000100000000000100ffff0000000000000000ffffffffffffffffffffffffffffffff0000000000000000ffffffffffffffff000000ffffffff00ffff1a000400010000020400000000040200000a08ffffffffffffffff000100000000", &mut test);
+	ext_from_hex("000000000090000000000000000064000100000000000100ffff0000000000000000ffffffffffffffffffffffffffffffff0000000000000000ffffffffffffffff000000ffffffff00ffff1a000400010000020400000000040200000a08ffffffffffffffff0001000000000000", &mut test);
 
 	// new outbound connection with id 0
 	ext_from_hex("00", &mut test);