Storage chains: serve transactions over IPFS/bitswap (#7963)

* IPFS server for transactions

* Style

* Indent

* Log message

* CLI option

* Apply suggestions from code review

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

* Style

* Style

* Minor fixes

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

substrate/client/network/build.rs

@@ -1,6 +1,7 @@
 const PROTOS: &[&str] = &[
 	"src/schema/api.v1.proto",
-	"src/schema/light.v1.proto"
+	"src/schema/light.v1.proto",
+	"src/schema/bitswap.v1.2.0.proto",
 ];
 
 fn main() {