pallet: introduce custom error code type

Author: rphmeier

sugondat-chain/pallets/blobs/Cargo.toml

@@ -31,6 +31,9 @@ sp-io = { git = "https://github.com/paritytech/polkadot-sdk", default-features =
 # Substrate
 sp-core = { git = "https://github.com/paritytech/polkadot-sdk", default-features = false, branch = "release-polkadot-v1.2.0" }
 
+# Local
+sugondat-primitives = { path = "../../primitives", default-features = false }
+
 [features]
 default = ["std"]
 runtime-benchmarks = [
@@ -48,5 +51,6 @@ std = [
 	"frame-system/std",
 	"sp-std/std",
 	"sugondat-nmt/native",
+    "sugondat-primitives/std",
 ]
 try-runtime = [ "frame-support/try-runtime" ]

sugondat-chain/pallets/blobs/src/lib.rs

@@ -22,6 +22,7 @@ use sp_runtime::{
         InvalidTransaction, TransactionValidity, TransactionValidityError, ValidTransaction,
     },
 };
+use sugondat_primitives::InvalidTransactionCustomError;
 
 use frame_support::traits::{Get, IsSubType};
 
@@ -313,7 +314,10 @@ where
                     // This causes the transaction to be expunged from the transaction pool.
                     // It will not be valid unless the configured limit is increased by governance,
                     // which is a rare event.
-                    return Err(InvalidTransaction::Custom(0).into());
+                    return Err(InvalidTransaction::Custom(
+                        InvalidTransactionCustomError::BlobExceedsSizeLimit,
+                    )
+                    .into());
                 }
             }
         }

sugondat-chain/primitives/src/lib.rs

@@ -44,3 +44,10 @@ pub mod opaque {
     /// Opaque block hash type.
     pub type Hash = <BlakeTwo256 as HashT>::Output;
 }
+
+/// Invalid transaction custom errors for Sugondat Runtimes
+#[repr(u8)]
+pub enum InvalidTransactionCustomError {
+    /// The blob exceeds the configured per-blob size limit.
+    BlobExceedsSizeLimit = 100,
+}