feat: add POST /v1/transaction/parse endpoint

crates/server/src/handlers/blocks/processing/extrinsics.rs

@@ -9,7 +9,7 @@
 //! - Converting account addresses to SS58 format
 
 use crate::state::AppState;
-use crate::utils::{self, EraInfo};
+use crate::utils::{self, ChargeAssetTxPayment, ChargeTransactionPayment, CheckNonce, EraInfo};
 use heck::ToLowerCamelCase;
 use serde_json::{Value, json};
 use sp_core::crypto::{AccountId32, Ss58Codec};
@@ -22,29 +22,6 @@ use super::super::types::{
     ExtrinsicInfo, GetBlockError, MethodInfo, MultiAddress, SignatureInfo, SignerId,
 };
 
-// ================================================================================================
-// Signed Extension Types
-// ================================================================================================
-
-/// CheckNonce signed extension - contains the account nonce
-/// SCALE encoded as a compact u32
-#[derive(parity_scale_codec::Decode)]
-struct CheckNonce(#[codec(compact)] u32);
-
-/// ChargeTransactionPayment signed extension - contains the tip amount
-/// SCALE encoded as a compact u128
-#[derive(parity_scale_codec::Decode)]
-struct ChargeTransactionPayment(#[codec(compact)] u128);
-
-/// ChargeAssetTxPayment signed extension - contains tip and optional asset_id
-/// Used on Asset Hub and other chains that support paying fees in non-native assets
-#[derive(parity_scale_codec::Decode)]
-struct ChargeAssetTxPayment {
-    #[codec(compact)]
-    tip: u128,
-    // asset_id is Option<AssetId> but we don't need it for tip extraction
-}
-
 /// Extract extrinsics from a block using subxt with explicit ss58_prefix
 ///
 /// This version allows specifying the ss58_prefix explicitly, useful for

crates/server/src/handlers/transaction/mod.rs

@@ -10,10 +10,12 @@ pub mod dry_run;
 pub mod fee_estimate;
 pub mod material;
 pub mod metadata_blob;
+pub mod parse;
 pub mod submit;
 
 pub use dry_run::{dry_run, dry_run_rc};
 pub use fee_estimate::{fee_estimate, fee_estimate_rc};
 pub use material::{material, material_rc, material_versioned, material_versioned_rc};
 pub use metadata_blob::{metadata_blob, metadata_blob_rc};
+pub use parse::{parse, parse_rc};
 pub use submit::{submit, submit_rc};