apollo_consensus_orchestrator: wire SNIP-35 fee_proposal into cende blob

Author: sirandreww-starkware

crates/apollo_consensus_orchestrator/resources/central_blob.json

@@ -93,6 +93,9 @@
     "l2_gas_consumed": 150000,
     "next_l2_gas_price": "0x186a0"
   },
+  "snip35_info": {
+    "fee_proposal_fri": "0x186a0"
+  },
   "transactions": [
     {
       "tx": {

crates/apollo_consensus_orchestrator/resources/central_blob_empty_or_none_fields.json

@@ -54,6 +54,9 @@
     "l2_gas_consumed": 150000,
     "next_l2_gas_price": "0x186a0"
   },
+  "snip35_info": {
+    "fee_proposal_fri": "0x186a0"
+  },
   "transactions": [],
   "execution_infos": [],
   "contract_classes": [],

crates/apollo_consensus_orchestrator/src/cende/central_objects.rs

@@ -50,6 +50,7 @@ use starknet_types_core::felt::Felt;
 
 use super::{CendeAmbassadorError, CendeAmbassadorResult};
 use crate::fee_market::FeeMarketInfo;
+use crate::snip35::Snip35Info;
 
 /// Central objects are required in order to continue processing the block by the centralized
 /// Python pipline. These objects are written to the Aerospike database and are used by python
@@ -86,6 +87,7 @@ impl From<BouncerWeights> for CentralBouncerWeights {
     }
 }
 pub(crate) type CentralFeeMarketInfo = FeeMarketInfo;
+pub(crate) type CentralSnip35Info = Snip35Info;
 pub(crate) type CentralCompressedStateDiff = CentralStateDiff;
 pub(crate) type CentralSierraContractClassEntry = (ClassHash, CentralSierraContractClass);
 pub(crate) type CentralCasmContractClassEntry = (CompiledClassHash, CentralCasmContractClass);

crates/apollo_consensus_orchestrator/src/cende/central_objects_test.rs

@@ -141,6 +141,7 @@ use super::{
     CentralFeeMarketInfo,
     CentralInvokeTransaction,
     CentralSierraContractClass,
+    CentralSnip35Info,
     CentralStateDiff,
     CentralTransaction,
     CentralTransactionWritten,
@@ -417,6 +418,10 @@ fn central_fee_market_info() -> CentralFeeMarketInfo {
     CentralFeeMarketInfo { l2_gas_consumed: GasAmount(150000), next_l2_gas_price: GasPrice(100000) }
 }
 
+fn central_snip35_info() -> CentralSnip35Info {
+    CentralSnip35Info { fee_proposal_fri: Some(GasPrice(100000)) }
+}
+
 fn entry_point(idx: usize, selector: u8) -> EntryPoint {
     EntryPoint { function_idx: FunctionIndex(idx), selector: EntryPointSelector(felt!(selector)) }
 }
@@ -746,6 +751,7 @@ fn central_blob() -> AerospikeBlob {
         transactions_with_execution_infos,
         bouncer_weights: test_bouncer_weights(),
         fee_market_info: central_fee_market_info(),
+        snip35_info: central_snip35_info(),
         casm_hash_computation_data_sierra_gas: central_casm_hash_computation_data(),
         casm_hash_computation_data_proving_gas: central_casm_hash_computation_data(),
         compiled_class_hashes_for_migration: central_compiled_class_hashes_for_migration(),
@@ -777,6 +783,7 @@ fn central_blob_with_empty_or_none_fields() -> AerospikeBlob {
         transactions_with_execution_infos: vec![],
         bouncer_weights: test_bouncer_weights(),
         fee_market_info: central_fee_market_info(),
+        snip35_info: central_snip35_info(),
         casm_hash_computation_data_sierra_gas: central_casm_hash_computation_data(),
         casm_hash_computation_data_proving_gas: central_casm_hash_computation_data(),
         compiled_class_hashes_for_migration: vec![],

crates/apollo_consensus_orchestrator/src/cende/mod.rs

@@ -24,6 +24,7 @@ use central_objects::{
     CentralCompressedStateDiff,
     CentralFeeMarketInfo,
     CentralSierraContractClassEntry,
+    CentralSnip35Info,
     CentralStateDiff,
     CentralTransactionWritten,
 };
@@ -53,6 +54,7 @@ use crate::metrics::{
     CENDE_WRITE_BLOB_SUCCESS,
     CENDE_WRITE_PREV_HEIGHT_BLOB_LATENCY,
 };
+use crate::snip35::Snip35Info;
 
 #[derive(thiserror::Error, Debug)]
 pub enum CendeAmbassadorError {
@@ -80,6 +82,7 @@ pub struct AerospikeBlob {
     compressed_state_diff: Option<CentralCompressedStateDiff>,
     bouncer_weights: CentralBouncerWeights,
     fee_market_info: CentralFeeMarketInfo,
+    snip35_info: CentralSnip35Info,
     transactions: Vec<CentralTransactionWritten>,
     execution_infos: Vec<CentralTransactionExecutionInfo>,
     contract_classes: Vec<CentralSierraContractClassEntry>,
@@ -362,6 +365,7 @@ pub struct BlobParameters {
     pub compressed_state_diff: Option<CommitmentStateDiff>,
     pub bouncer_weights: BouncerWeights,
     pub fee_market_info: FeeMarketInfo,
+    pub snip35_info: Snip35Info,
     pub transactions_with_execution_infos: Vec<InternalTransactionWithReceipt>,
     pub casm_hash_computation_data_sierra_gas: CasmHashComputationData,
     pub casm_hash_computation_data_proving_gas: CasmHashComputationData,
@@ -412,6 +416,7 @@ impl AerospikeBlob {
             compressed_state_diff,
             bouncer_weights: blob_parameters.bouncer_weights.into(),
             fee_market_info: blob_parameters.fee_market_info,
+            snip35_info: blob_parameters.snip35_info,
             transactions: central_transactions,
             execution_infos,
             contract_classes,

crates/apollo_consensus_orchestrator/src/sequencer_consensus_context.rs

@@ -99,6 +99,7 @@ use crate::snip35::{
     compute_fee_actual,
     compute_fee_proposal,
     compute_fee_target,
+    Snip35Info,
     FEE_PROPOSAL_MARGIN_PPT,
     FEE_PROPOSAL_WINDOW_SIZE,
     ORACLE_L2_GAS_FLOOR_MAX_FRI,
@@ -546,6 +547,11 @@ impl SequencerConsensusContext {
                     l2_gas_consumed: l2_gas_used,
                     next_l2_gas_price: self.l2_gas_price,
                 },
+                // SNIP-35: forward the proposer's stated fee_proposal_fri (from ProposalInit)
+                // to the centralized cende pipeline. The centralized side persists this in
+                // its own storage namespace, separate from FeeMarketInfo. Pre-V0_14_3 blocks
+                // have `init.fee_proposal_fri == None`.
+                snip35_info: Snip35Info { fee_proposal_fri: init.fee_proposal_fri },
                 compiled_class_hashes_for_migration: central_objects
                     .compiled_class_hashes_for_migration,
                 proposal_commitment: commitment,

crates/apollo_consensus_orchestrator/src/snip35/mod.rs

@@ -13,11 +13,24 @@
 //! `fee_actual` as a floor.
 
 use ethnum::U256;
+use serde::Serialize;
 use starknet_api::block::GasPrice;
 
 #[cfg(test)]
 mod test;
 
+/// SNIP-35 proposer-stated fee value for a block, as it travels in the cende blob to the
+/// centralized recorder. Mirrors the `Snip35Info` Marshmallow dataclass on the centralized
+/// (Python) side; the wire JSON shape must agree across the language boundary.
+#[cfg_attr(any(feature = "testing", test), derive(serde::Deserialize, PartialEq))]
+#[derive(Debug, Default, Serialize)]
+pub struct Snip35Info {
+    /// `None` for pre-V0_14_3 blocks (no value stated by the proposer); `Some(...)` for SNIP-35
+    /// era blocks. The centralized side persists this independently of `FeeMarketInfo` so
+    /// existing fee market storage blobs are untouched.
+    pub fee_proposal_fri: Option<GasPrice>,
+}
+
 /// Scale factor for 18-decimal fixed-point conversion (1 STRK = 10^18 FRI).
 const FRI_DECIMALS_SCALE: u128 = 10u128.pow(18);
 

crates/apollo_consensus_orchestrator/src/snip35/test.rs

@@ -1,7 +1,35 @@
 use rstest::rstest;
 use starknet_api::block::GasPrice;
 
-use crate::snip35::{compute_fee_actual, compute_fee_proposal, compute_fee_target};
+use crate::snip35::{compute_fee_actual, compute_fee_proposal, compute_fee_target, Snip35Info};
+
+#[test]
+fn snip35_info_serializes_field_by_name() {
+    // The cende blob's wire shape must agree with the Python `Snip35Info` Marshmallow
+    // dataclass — same field name (`fee_proposal_fri`), same JSON shape. If a refactor here
+    // accidentally renames or restructures the field, the centralized recorder would silently
+    // fail to load the Marshmallow schema on the new blob shape.
+    let info = Snip35Info { fee_proposal_fri: Some(GasPrice(0x1dcd65000)) };
+    let json = serde_json::to_value(&info).unwrap();
+    assert_eq!(json["fee_proposal_fri"], serde_json::Value::String("0x1dcd65000".to_string()));
+
+    let info_none = Snip35Info { fee_proposal_fri: None };
+    let json_none = serde_json::to_value(&info_none).unwrap();
+    assert_eq!(json_none["fee_proposal_fri"], serde_json::Value::Null);
+}
+
+#[test]
+fn snip35_info_round_trips_through_serde_json() {
+    let original = Snip35Info { fee_proposal_fri: Some(GasPrice(0xDEAD_BEEF)) };
+    let bytes = serde_json::to_vec(&original).unwrap();
+    let reparsed: Snip35Info = serde_json::from_slice(&bytes).unwrap();
+    assert_eq!(reparsed, original);
+
+    let original_none = Snip35Info { fee_proposal_fri: None };
+    let bytes_none = serde_json::to_vec(&original_none).unwrap();
+    let reparsed_none: Snip35Info = serde_json::from_slice(&bytes_none).unwrap();
+    assert_eq!(reparsed_none, original_none);
+}
 
 const FRI_DECIMALS_SCALE: u128 = 10u128.pow(18);
 const FLOOR_MIN_FRI: u128 = 100;