Migrate from ethereum-types to alloy-primitives (#6078)

* Remove use of ethers_core::RlpStream * Merge branch 'unstable' of https://github.com/sigp/lighthouse into remove_use_of_ethers_core * Remove old code * Simplify keccak call * Remove unused package * Merge branch 'unstable' of https://github.com/ethDreamer/lighthouse into remove_use_of_ethers_core * Merge branch 'unstable' into remove_use_of_ethers_core * Run clippy * Merge branch 'remove_use_of_ethers_core' of https://github.com/dospore/lighthouse into remove_use_of_ethers_core * Check all cargo fmt * migrate to alloy primitives init * fix deps * integrate alloy-primitives * resolve dep issues * more changes based on dep changes * add TODOs * Merge branch 'unstable' of https://github.com/sigp/lighthouse into remove_use_of_ethers_core * Revert lock * Add BeaconBlocksByRange v3 * continue migration * Revert "Add BeaconBlocksByRange v3" This reverts commit e3ce7fc. * impl hash256 extended trait * revert some uneeded diffs * merge conflict resolved * fix subnet id rshift calc * rename to FixedBytesExtended * debugging * Merge branch 'unstable' of https://github.com/sigp/lighthouse into migrate-to-alloy-primitives * fix failed test * fixing more tests * Merge branch 'unstable' of https://github.com/sigp/lighthouse into remove_use_of_ethers_core * introduce a shim to convert between the two u256 types * move alloy to wrokspace * align alloy versions * update * update web3signer test certs * refactor * resolve failing tests * linting * fix graffiti string test * fmt * fix ef test * resolve merge conflicts * remove udep and revert cert * cargo patch * cyclic dep * fix build error * Merge branch 'unstable' of https://github.com/sigp/lighthouse into migrate-to-alloy-primitives * resolve conflicts, update deps * merge unstable * fmt * fix deps * Merge branch 'unstable' of https://github.com/sigp/lighthouse into migrate-to-alloy-primitives * resolve merge conflicts * resolve conflicts, make necessary changes * Remove patch * fmt * remove file * merge conflicts * sneaking in a smol change * bump versions * Merge remote-tracking branch 'origin/unstable' into migrate-to-alloy-primitives * Updates for peerDAS * Update ethereum_hashing to prevent dupe * updated alloy-consensus, removed TODOs * cargo update * endianess fix * Merge branch 'unstable' of https://github.com/sigp/lighthouse into migrate-to-alloy-primitives * fmt * fix merge * fix test * fixed_bytes crate * minor fixes * convert u256 to i64 * panic free mixin to_low_u64_le * from_str_radix * computbe_subnet api and ensuring we use big-endian * Merge branch 'unstable' of https://github.com/sigp/lighthouse into migrate-to-alloy-primitives * fix test * Simplify subnet_id test * Simplify some more tests * Add tests to fixed_bytes crate * Merge branch 'unstable' into migrate-to-alloy-primitives
sigp · Sep 2, 2024 · 99e53b8 · 99e53b8
1 parent 002ca2c
commit 99e53b8
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Showing 152 changed files with 1,048 additions and 716 deletions.
diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -52,6 +52,7 @@ members = [
     "database_manager",
 
     "consensus/int_to_bytes",
+    "consensus/fixed_bytes",
     "consensus/fork_choice",
     "consensus/proto_array",
     "consensus/safe_arith",
@@ -94,9 +95,9 @@ resolver = "2"
 edition = "2021"
 
 [workspace.dependencies]
-alloy-primitives = "0.7.7"
+alloy-primitives = "0.8"
 alloy-rlp = "0.3.4"
-alloy-consensus = "0.2.0"
+alloy-consensus = "0.3.0"
 anyhow = "1"
 arbitrary = { version = "1", features = ["derive"] }
 async-channel = "1.9.0"
@@ -118,11 +119,10 @@ rust_eth_kzg = "0.5.1"
 discv5 = { version = "0.4.1", features = ["libp2p"] }
 env_logger = "0.9"
 error-chain = "0.12"
-ethereum-types = "0.14"
-ethereum_hashing = "0.6.0"
-ethereum_serde_utils = "0.5.2"
-ethereum_ssz = "0.5"
-ethereum_ssz_derive = "0.5"
+ethereum_hashing = "0.7.0"
+ethereum_serde_utils = "0.7"
+ethereum_ssz = "0.7"
+ethereum_ssz_derive = "0.7"
 ethers-core = "1"
 ethers-providers = { version = "1", default-features = false }
 exit-future = "0.2"
@@ -137,7 +137,7 @@ libsecp256k1 = "0.7"
 log = "0.4"
 lru = "0.12"
 maplit = "1"
-milhouse = "0.1"
+milhouse = "0.3"
 num_cpus = "1"
 parking_lot = "0.12"
 paste = "1"
@@ -163,7 +163,7 @@ slog-term = "2"
 sloggers = { version = "2", features = ["json"] }
 smallvec = { version = "1.11.2", features = ["arbitrary"] }
 snap = "1"
-ssz_types = "0.6"
+ssz_types = "0.8"
 strum = { version = "0.24", features = ["derive"] }
 superstruct = "0.8"
 syn = "1"
@@ -177,8 +177,8 @@ tracing-appender = "0.2"
 tracing-core = "0.1"
 tracing-log = "0.2"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
-tree_hash = "0.6"
-tree_hash_derive = "0.6"
+tree_hash = "0.8"
+tree_hash_derive = "0.8"
 url = "2"
 uuid = { version = "0.8", features = ["serde", "v4"] }
 warp = { version = "0.3.7", default-features = false, features = ["tls"] }
@@ -205,6 +205,7 @@ eth2_keystore = { path = "crypto/eth2_keystore" }
 eth2_network_config = { path = "common/eth2_network_config" }
 eth2_wallet = { path = "crypto/eth2_wallet" }
 execution_layer = { path = "beacon_node/execution_layer" }
+fixed_bytes = { path = "consensus/fixed_bytes" }
 filesystem = { path = "common/filesystem" }
 fork_choice = { path = "consensus/fork_choice" }
 genesis = { path = "beacon_node/genesis" }
@@ -240,11 +241,11 @@ validator_client = { path = "validator_client" }
 validator_dir = { path = "common/validator_dir" }
 warp_utils = { path = "common/warp_utils" }
 
-[patch.crates-io]
-quick-protobuf = { git = "https://github.com/sigp/quick-protobuf.git", rev = "681f413312404ab6e51f0b46f39b0075c6f4ebfd" }
-
 [profile.maxperf]
 inherits = "release"
 lto = "fat"
 codegen-units = 1
 incremental = false
+
+[patch.crates-io]
+quick-protobuf = { git = "https://github.com/sigp/quick-protobuf.git", rev = "681f413312404ab6e51f0b46f39b0075c6f4ebfd" }
diff --git a/beacon_node/beacon_chain/Cargo.toml b/beacon_node/beacon_chain/Cargo.toml
@@ -23,6 +23,7 @@ serde_json = { workspace = true }
 criterion = { workspace = true }
 
 [dependencies]
+alloy-primitives = { workspace = true }
 bitvec = { workspace = true }
 bls = { workspace = true }
 derivative = { workspace = true }

diff --git a/beacon_node/beacon_chain/src/attester_cache.rs b/beacon_node/beacon_chain/src/attester_cache.rs
@@ -19,8 +19,8 @@ use types::{
     beacon_state::{
         compute_committee_index_in_epoch, compute_committee_range_in_epoch, epoch_committee_count,
     },
-    BeaconState, BeaconStateError, ChainSpec, Checkpoint, Epoch, EthSpec, Hash256, RelativeEpoch,
-    Slot,
+    BeaconState, BeaconStateError, ChainSpec, Checkpoint, Epoch, EthSpec, FixedBytesExtended,
+    Hash256, RelativeEpoch, Slot,
 };
 
 type JustifiedCheckpoint = Checkpoint;

diff --git a/beacon_node/beacon_chain/src/beacon_block_streamer.rs b/beacon_node/beacon_chain/src/beacon_block_streamer.rs
@@ -715,7 +715,9 @@ mod tests {
     use std::sync::LazyLock;
     use std::time::Duration;
     use tokio::sync::mpsc;
-    use types::{ChainSpec, Epoch, EthSpec, Hash256, Keypair, MinimalEthSpec, Slot};
+    use types::{
+        ChainSpec, Epoch, EthSpec, FixedBytesExtended, Hash256, Keypair, MinimalEthSpec, Slot,
+    };
 
     const VALIDATOR_COUNT: usize = 48;
 

diff --git a/beacon_node/beacon_chain/src/beacon_chain.rs b/beacon_node/beacon_chain/src/beacon_chain.rs
@@ -134,10 +134,10 @@ pub type ForkChoiceError = fork_choice::Error<crate::ForkChoiceStoreError>;
 type HashBlockTuple<E> = (Hash256, RpcBlock<E>);
 
 // These keys are all zero because they get stored in different columns, see `DBColumn` type.
-pub const BEACON_CHAIN_DB_KEY: Hash256 = Hash256::zero();
-pub const OP_POOL_DB_KEY: Hash256 = Hash256::zero();
-pub const ETH1_CACHE_DB_KEY: Hash256 = Hash256::zero();
-pub const FORK_CHOICE_DB_KEY: Hash256 = Hash256::zero();
+pub const BEACON_CHAIN_DB_KEY: Hash256 = Hash256::ZERO;
+pub const OP_POOL_DB_KEY: Hash256 = Hash256::ZERO;
+pub const ETH1_CACHE_DB_KEY: Hash256 = Hash256::ZERO;
+pub const FORK_CHOICE_DB_KEY: Hash256 = Hash256::ZERO;
 
 /// Defines how old a block can be before it's no longer a candidate for the early attester cache.
 const EARLY_ATTESTER_CACHE_HISTORIC_SLOTS: u64 = 4;
@@ -528,7 +528,7 @@ impl<E: EthSpec> BeaconBlockResponseWrapper<E> {
     }
 
     pub fn consensus_block_value_wei(&self) -> Uint256 {
-        Uint256::from(self.consensus_block_value_gwei()) * 1_000_000_000
+        Uint256::from(self.consensus_block_value_gwei()) * Uint256::from(1_000_000_000)
     }
 
     pub fn is_blinded(&self) -> bool {
@@ -3446,7 +3446,7 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
         {
             let mut slashable_cache = self.observed_slashable.write();
             for header in blobs
-                .into_iter()
+                .iter()
                 .filter_map(|b| b.as_ref().map(|b| b.signed_block_header.clone()))
                 .unique()
             {
@@ -5425,7 +5425,7 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
                     },
                 }),
                 None,
-                Uint256::zero(),
+                Uint256::ZERO,
             ),
             BeaconState::Altair(_) => (
                 BeaconBlock::Altair(BeaconBlockAltair {
@@ -5448,7 +5448,7 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
                     },
                 }),
                 None,
-                Uint256::zero(),
+                Uint256::ZERO,
             ),
             BeaconState::Bellatrix(_) => {
                 let block_proposal_contents =

diff --git a/beacon_node/beacon_chain/src/beacon_fork_choice_store.rs b/beacon_node/beacon_chain/src/beacon_fork_choice_store.rs
@@ -17,7 +17,7 @@ use store::{Error as StoreError, HotColdDB, ItemStore};
 use superstruct::superstruct;
 use types::{
     AbstractExecPayload, BeaconBlockRef, BeaconState, BeaconStateError, Checkpoint, Epoch, EthSpec,
-    Hash256, Slot,
+    FixedBytesExtended, Hash256, Slot,
 };
 
 #[derive(Debug)]

diff --git a/beacon_node/beacon_chain/src/bellatrix_readiness.rs b/beacon_node/beacon_chain/src/bellatrix_readiness.rs
@@ -64,7 +64,7 @@ impl MergeConfig {
     /// Instantiate `self` from the values in a `ChainSpec`.
     pub fn from_chainspec(spec: &ChainSpec) -> Self {
         let mut params = MergeConfig::default();
-        if spec.terminal_total_difficulty != Uint256::max_value() {
+        if spec.terminal_total_difficulty != Uint256::MAX {
             params.terminal_total_difficulty = Some(spec.terminal_total_difficulty);
         }
         if spec.terminal_block_hash != ExecutionBlockHash::zero() {

diff --git a/beacon_node/beacon_chain/src/block_times_cache.rs b/beacon_node/beacon_chain/src/block_times_cache.rs
@@ -294,6 +294,7 @@ impl BlockTimesCache {
 #[cfg(test)]
 mod test {
     use super::*;
+    use types::FixedBytesExtended;
 
     #[test]
     fn observed_time_uses_minimum() {

diff --git a/beacon_node/beacon_chain/src/builder.rs b/beacon_node/beacon_chain/src/builder.rs
@@ -39,8 +39,8 @@ use std::time::Duration;
 use store::{Error as StoreError, HotColdDB, ItemStore, KeyValueStoreOp};
 use task_executor::{ShutdownReason, TaskExecutor};
 use types::{
-    BeaconBlock, BeaconState, BlobSidecarList, ChainSpec, Checkpoint, Epoch, EthSpec, Hash256,
-    Signature, SignedBeaconBlock, Slot,
+    BeaconBlock, BeaconState, BlobSidecarList, ChainSpec, Checkpoint, Epoch, EthSpec,
+    FixedBytesExtended, Hash256, Signature, SignedBeaconBlock, Slot,
 };
 
 /// An empty struct used to "witness" all the `BeaconChainTypes` traits. It has no user-facing
@@ -1292,7 +1292,7 @@ mod test {
         }
 
         for v in state.validators() {
-            let creds = v.withdrawal_credentials.as_bytes();
+            let creds = v.withdrawal_credentials.as_slice();
             assert_eq!(
                 creds[0], spec.bls_withdrawal_prefix_byte,
                 "first byte of withdrawal creds should be bls prefix"

diff --git a/beacon_node/beacon_chain/src/data_availability_checker/overflow_lru_cache.rs b/beacon_node/beacon_chain/src/data_availability_checker/overflow_lru_cache.rs
@@ -273,7 +273,6 @@ impl<E: EthSpec> PendingComponents<E> {
                 let num_blobs_expected = diet_executed_block.num_blobs_expected();
                 let Some(verified_blobs) = verified_blobs
                     .into_iter()
-                    .cloned()
                     .map(|b| b.map(|b| b.to_blob()))
                     .take(num_blobs_expected)
                     .collect::<Option<Vec<_>>>()
@@ -1155,7 +1154,9 @@ mod pending_components_tests {
     use rand::SeedableRng;
     use state_processing::ConsensusContext;
     use types::test_utils::TestRandom;
-    use types::{BeaconState, ForkName, MainnetEthSpec, SignedBeaconBlock, Slot};
+    use types::{
+        BeaconState, FixedBytesExtended, ForkName, MainnetEthSpec, SignedBeaconBlock, Slot,
+    };
 
     type E = MainnetEthSpec;
 

diff --git a/beacon_node/beacon_chain/src/eth1_chain.rs b/beacon_node/beacon_chain/src/eth1_chain.rs
@@ -685,7 +685,7 @@ fn is_candidate_block(block: &Eth1Block, period_start: u64, spec: &ChainSpec) ->
 #[cfg(test)]
 mod test {
     use super::*;
-    use types::{DepositData, MinimalEthSpec, Signature};
+    use types::{DepositData, FixedBytesExtended, MinimalEthSpec, Signature};
 
     type E = MinimalEthSpec;
 

diff --git a/beacon_node/beacon_chain/src/execution_payload.rs b/beacon_node/beacon_chain/src/execution_payload.rs
@@ -505,7 +505,7 @@ where
             return Ok(BlockProposalContentsType::Full(
                 BlockProposalContents::Payload {
                     payload: FullPayload::default_at_fork(fork)?,
-                    block_value: Uint256::zero(),
+                    block_value: Uint256::ZERO,
                 },
             ));
         }
@@ -523,7 +523,7 @@ where
             return Ok(BlockProposalContentsType::Full(
                 BlockProposalContents::Payload {
                     payload: FullPayload::default_at_fork(fork)?,
-                    block_value: Uint256::zero(),
+                    block_value: Uint256::ZERO,
                 },
             ));
         }

diff --git a/beacon_node/beacon_chain/src/head_tracker.rs b/beacon_node/beacon_chain/src/head_tracker.rs
@@ -105,7 +105,7 @@ impl SszHeadTracker {
 mod test {
     use super::*;
     use ssz::{Decode, Encode};
-    use types::{BeaconBlock, EthSpec, MainnetEthSpec};
+    use types::{BeaconBlock, EthSpec, FixedBytesExtended, MainnetEthSpec};
 
     type E = MainnetEthSpec;
 

diff --git a/beacon_node/beacon_chain/src/historical_blocks.rs b/beacon_node/beacon_chain/src/historical_blocks.rs
@@ -11,7 +11,7 @@ use std::iter;
 use std::time::Duration;
 use store::metadata::DataColumnInfo;
 use store::{chunked_vector::BlockRoots, AnchorInfo, BlobInfo, ChunkWriter, KeyValueStore};
-use types::{Hash256, Slot};
+use types::{FixedBytesExtended, Hash256, Slot};
 
 /// Use a longer timeout on the pubkey cache.
 ///

diff --git a/beacon_node/beacon_chain/src/metrics.rs b/beacon_node/beacon_chain/src/metrics.rs
@@ -1,6 +1,7 @@
 use crate::observed_attesters::SlotSubcommitteeIndex;
 use crate::types::consts::altair::SYNC_COMMITTEE_SUBNET_COUNT;
 use crate::{BeaconChain, BeaconChainError, BeaconChainTypes};
+use bls::FixedBytesExtended;
 pub use lighthouse_metrics::*;
 use slot_clock::SlotClock;
 use std::sync::LazyLock;

diff --git a/beacon_node/beacon_chain/src/migrate.rs b/beacon_node/beacon_chain/src/migrate.rs
@@ -14,8 +14,8 @@ use store::iter::RootsIterator;
 use store::{Error, ItemStore, StoreItem, StoreOp};
 pub use store::{HotColdDB, MemoryStore};
 use types::{
-    BeaconState, BeaconStateError, BeaconStateHash, Checkpoint, Epoch, EthSpec, Hash256,
-    SignedBeaconBlockHash, Slot,
+    BeaconState, BeaconStateError, BeaconStateHash, Checkpoint, Epoch, EthSpec, FixedBytesExtended,
+    Hash256, SignedBeaconBlockHash, Slot,
 };
 
 /// Compact at least this frequently, finalization permitting (7 days).

diff --git a/beacon_node/beacon_chain/src/naive_aggregation_pool.rs b/beacon_node/beacon_chain/src/naive_aggregation_pool.rs
@@ -48,7 +48,7 @@ impl TreeHash for AttestationKey {
                 // Combine the hash of the data with the hash of the index
                 let mut hasher = MerkleHasher::with_leaves(2);
                 hasher
-                    .write(self.data_root.as_bytes())
+                    .write(self.data_root.as_slice())
                     .expect("should write data hash");
                 hasher
                     .write(&index.to_le_bytes())
@@ -582,7 +582,8 @@ mod tests {
     use tree_hash::TreeHash;
     use types::{
         test_utils::{generate_deterministic_keypair, test_random_instance},
-        Attestation, AttestationBase, AttestationElectra, Fork, Hash256, SyncCommitteeMessage,
+        Attestation, AttestationBase, AttestationElectra, FixedBytesExtended, Fork, Hash256,
+        SyncCommitteeMessage,
     };
 
     type E = types::MainnetEthSpec;

diff --git a/beacon_node/beacon_chain/src/observed_aggregates.rs b/beacon_node/beacon_chain/src/observed_aggregates.rs
@@ -473,7 +473,7 @@ where
 #[cfg(not(debug_assertions))]
 mod tests {
     use super::*;
-    use types::{test_utils::test_random_instance, AttestationBase, Hash256};
+    use types::{test_utils::test_random_instance, AttestationBase, FixedBytesExtended, Hash256};
 
     type E = types::MainnetEthSpec;
 

diff --git a/beacon_node/beacon_chain/src/observed_attesters.rs b/beacon_node/beacon_chain/src/observed_attesters.rs
@@ -619,6 +619,7 @@ impl SlotSubcommitteeIndex {
 #[cfg(test)]
 mod tests {
     use super::*;
+    use types::FixedBytesExtended;
 
     type E = types::MainnetEthSpec;
 

diff --git a/beacon_node/beacon_chain/src/otb_verification_service.rs b/beacon_node/beacon_chain/src/otb_verification_service.rs
@@ -64,7 +64,7 @@ impl OptimisticTransitionBlock {
         store
             .as_ref()
             .hot_db
-            .key_delete(OTBColumn.into(), self.root.as_bytes())
+            .key_delete(OTBColumn.into(), self.root.as_slice())
     }
 
     fn is_canonical<T: BeaconChainTypes>(

diff --git a/beacon_node/beacon_chain/src/schema_change/migration_schema_v21.rs b/beacon_node/beacon_chain/src/schema_change/migration_schema_v21.rs
@@ -62,7 +62,7 @@ pub fn downgrade_from_v21<T: BeaconChainTypes>(
             message: format!("{e:?}"),
         })?;
 
-        let db_key = get_key_for_col(DBColumn::PubkeyCache.into(), key.as_bytes());
+        let db_key = get_key_for_col(DBColumn::PubkeyCache.into(), key.as_slice());
         ops.push(KeyValueStoreOp::PutKeyValue(
             db_key,
             pubkey_bytes.as_ssz_bytes(),

diff --git a/beacon_node/beacon_chain/src/test_utils.rs b/beacon_node/beacon_chain/src/test_utils.rs
@@ -2627,6 +2627,7 @@ pub fn generate_rand_block_and_blobs<E: EthSpec>(
     let inner = map_fork_name!(fork_name, BeaconBlock, <_>::random_for_test(rng));
 
     let mut block = SignedBeaconBlock::from_block(inner, types::Signature::random_for_test(rng));
+
     let mut blob_sidecars = vec![];
 
     let bundle = match block {

diff --git a/beacon_node/beacon_chain/src/validator_pubkey_cache.rs b/beacon_node/beacon_chain/src/validator_pubkey_cache.rs
@@ -7,7 +7,7 @@ use ssz_derive::{Decode, Encode};
 use std::collections::HashMap;
 use std::marker::PhantomData;
 use store::{DBColumn, Error as StoreError, StoreItem, StoreOp};
-use types::{BeaconState, Hash256, PublicKey, PublicKeyBytes};
+use types::{BeaconState, FixedBytesExtended, Hash256, PublicKey, PublicKeyBytes};
 
 /// Provides a mapping of `validator_index -> validator_publickey`.
 ///

diff --git a/beacon_node/beacon_chain/tests/attestation_verification.rs b/beacon_node/beacon_chain/tests/attestation_verification.rs
@@ -24,8 +24,8 @@ use types::{
     signed_aggregate_and_proof::SignedAggregateAndProofRefMut,
     test_utils::generate_deterministic_keypair, Address, AggregateSignature, Attestation,
     AttestationRef, AttestationRefMut, BeaconStateError, BitList, ChainSpec, Epoch, EthSpec,
-    ForkName, Hash256, Keypair, MainnetEthSpec, SecretKey, SelectionProof, SignedAggregateAndProof,
-    Slot, SubnetId, Unsigned,
+    FixedBytesExtended, ForkName, Hash256, Keypair, MainnetEthSpec, SecretKey, SelectionProof,
+    SignedAggregateAndProof, Slot, SubnetId, Unsigned,
 };
 
 pub type E = MainnetEthSpec;

diff --git a/beacon_node/beacon_chain/tests/payload_invalidation.rs b/beacon_node/beacon_chain/tests/payload_invalidation.rs
@@ -1280,7 +1280,7 @@ struct OptimisticTransitionSetup {
 impl OptimisticTransitionSetup {
     async fn new(num_blocks: usize, ttd: u64) -> Self {
         let mut spec = E::default_spec();
-        spec.terminal_total_difficulty = ttd.into();
+        spec.terminal_total_difficulty = Uint256::from(ttd);
         let mut rig = InvalidPayloadRig::new_with_spec(spec).enable_attestations();
         rig.move_to_terminal_block();
 
@@ -1323,7 +1323,7 @@ async fn build_optimistic_chain(
     // Build a brand-new testing harness. We will apply the blocks from the previous harness to
     // this one.
     let mut spec = E::default_spec();
-    spec.terminal_total_difficulty = rig_ttd.into();
+    spec.terminal_total_difficulty = Uint256::from(rig_ttd);
     let rig = InvalidPayloadRig::new_with_spec(spec);
 
     let spec = &rig.harness.chain.spec;