refactor: remove unsupported bridge modes

Author: KolbyML

Diff for: .circleci/config.yml

@@ -97,9 +97,6 @@ jobs:
     steps:
       - checkout
       - setup_remote_docker
-      - run:
-          name: Clone portal-accumulators
-          command: git clone https://github.com/ethereum/portal-accumulators
       - run:
           name: Build Docker bridge image
           no_output_timeout: 30m

Diff for: .dockerignore

@@ -10,6 +10,3 @@
 
 # include for vergen constants
 !/.git
-
-# include portal-accumulators, which is used in the portal-bridge Dockerfile
-!/portal-accumulators

Diff for: Cargo.lock

@@ -37,7 +37,7 @@ rust-version = "1.85.0"
 version = "0.2.1"
 
 [workspace.dependencies]
-alloy = { version = "0.12", default-features = false, features = ["std"] }
+alloy = { version = "0.12", default-features = false, features = ["std", "serde"] }
 alloy-rlp = { version = "0.3.8", default-features = false, features = ["derive"] }
 anyhow = "1.0.68"
 async-trait = "0.1.68"

Diff for: Cargo.toml

@@ -1,9 +1,11 @@
 use std::path::PathBuf;
 
 use clap::Parser;
-use portal_bridge::{cli::DEFAULT_EPOCH_ACC_PATH, DEFAULT_BASE_EL_ENDPOINT};
+use portal_bridge::DEFAULT_BASE_EL_ENDPOINT;
 use url::Url;
 
+pub const DEFAULT_EPOCH_ACC_PATH: &str = "./portal-accumulators";
+
 #[derive(Parser, Debug, Clone)]
 #[command(name = "E2HS Writer", about = "Generate E2HS files")]
 pub struct WriterConfig {

Diff for: bin/e2hs-writer/src/cli.rs

@@ -21,7 +21,7 @@ use ethportal_api::types::{
     },
 };
 use futures::Stream;
-use portal_bridge::{api::execution::ExecutionApi, bridge::utils::lookup_epoch_acc};
+use portal_bridge::api::execution::ExecutionApi;
 use ssz_types::{typenum, FixedVector, VariableList};
 use tokio::try_join;
 use tree_hash::TreeHash;
@@ -35,7 +35,10 @@ use url::Url;
 
 use crate::{
     provider::EraProvider,
-    utils::{pre_capella_execution_payload_to_header, pre_deneb_execution_payload_to_header},
+    utils::{
+        lookup_epoch_acc, pre_capella_execution_payload_to_header,
+        pre_deneb_execution_payload_to_header,
+    },
 };
 
 pub struct AllBlockData {

Diff for: bin/e2hs-writer/src/reader.rs

@@ -1,3 +1,5 @@
+use std::{fs, path::Path};
+
 use alloy::{
     consensus::{
         proofs::{calculate_transaction_root, calculate_withdrawals_root},
@@ -6,11 +8,17 @@ use alloy::{
     eips::eip4895::Withdrawal,
     primitives::{Bloom, B64, U256},
 };
-use anyhow::ensure;
-use ethportal_api::types::consensus::execution_payload::{
-    ExecutionPayloadBellatrix, ExecutionPayloadCapella,
+use anyhow::{anyhow, ensure};
+use ethportal_api::{
+    types::{
+        consensus::execution_payload::{ExecutionPayloadBellatrix, ExecutionPayloadCapella},
+        execution::accumulator::EpochAccumulator,
+    },
+    utils::bytes::hex_encode,
 };
+use ssz::Decode;
 use trin_execution::era::beacon::EMPTY_UNCLE_ROOT_HASH;
+use trin_validation::accumulator::PreMergeAccumulator;
 
 pub fn pre_capella_execution_payload_to_header(
     payload: ExecutionPayloadBellatrix,
@@ -85,3 +93,27 @@ pub fn pre_deneb_execution_payload_to_header(
     );
     Ok(header)
 }
+
+/// Lookup the epoch accumulator & epoch hash for the given epoch index.
+pub async fn lookup_epoch_acc(
+    epoch_index: u64,
+    pre_merge_acc: &PreMergeAccumulator,
+    epoch_acc_path: &Path,
+) -> anyhow::Result<EpochAccumulator> {
+    let epoch_hash = pre_merge_acc.historical_epochs[epoch_index as usize];
+    let epoch_hash_pretty = hex_encode(epoch_hash);
+    let epoch_hash_pretty = epoch_hash_pretty.trim_start_matches("0x");
+    let epoch_acc_path = format!(
+        "{}/bridge_content/0x03{epoch_hash_pretty}.portalcontent",
+        epoch_acc_path.display(),
+    );
+    let epoch_acc = match fs::read(&epoch_acc_path) {
+        Ok(val) => EpochAccumulator::from_ssz_bytes(&val).map_err(|err| anyhow!("{err:?}"))?,
+        Err(_) => {
+            return Err(anyhow!(
+                "Unable to find local epoch acc at path: {epoch_acc_path:?}"
+            ))
+        }
+    };
+    Ok(epoch_acc)
+}

Diff for: bin/e2hs-writer/src/utils.rs

@@ -14,14 +14,12 @@ version.workspace = true
 [dependencies]
 alloy.workspace = true
 anyhow.workspace = true
-async-trait.workspace = true
 chrono.workspace = true
 clap.workspace = true
 delay_map.workspace = true
 discv5.workspace = true
 e2store.workspace = true
 eth_trie.workspace = true
-ethereum_ssz.workspace = true
 ethportal-api.workspace = true
 futures.workspace = true
 humanize-duration.workspace = true

Diff for: bin/portal-bridge/Cargo.toml

@@ -4,8 +4,7 @@ Process to feed the portal network by gossiping data retrieved from a trusted pr
 
 ex.
 ```sh
-git clone https://github.com/ethereum/portal-accumulators.git
-cargo run -p portal-bridge -- --executable-path ./target/debug/trin --epoch-accumulator-path ./portal-accumulators
+cargo run -p portal-bridge -- --executable-path ./target/debug/trin
 ```
 
 ## Providers
@@ -25,27 +24,7 @@ cargo run -p portal-bridge -- --executable-path ./target/debug/trin --epoch-accu
 
 ### Bridge modes
 
-#### History Subnetwork
-
-- `"--mode latest"`: follow the head of the chain and gossip latest blocks
-- `"--mode test:/path/to/test_data.json"`: gossip content keys & values found in test file.
-- `"--mode backfill:b100"`: start backfill at block #100
-- `"--mode backfill:e100"`: start backfill at epoch #100
-- `"--mode backfill:r10-12"`: backfill a block range from #10 to #12 (inclusive)
-- `"--mode single:b100"`: gossip a single block #100
-- `"--mode single:e100"`: gossip a single epoch #100
-- `"--mode fourfours`: will randomly select era1 files from `era1.ethportal.net` and gossip them
-- `"--mode fourfours:random_epoch"`: will randomly select a single era1 file from `era1.ethportal.net` and then gossip it
-- `"--mode fourfours:random_epoch:100"`: will randomly select a single era1 file from `era1.ethportal.net` that represents an epoch number greater than the floor provided and then gossip it
-- `"--mode fourfours:e600`: will select era1 file 600 from `era1.ethportal.net` and gossip it
-- `"--mode fourfours:r100-200`: will gossip a block range from an era1 file, range must be from the same epoch
-- `"--mode fourfours:hunter:10:50`: sample size = 10, threshold = 50
-    - will randomly select era1 files from `era1.ethportal.net` and gossip them after performing rfc lookups given the sample size. if the threshold is **not** met, the era1 file will be gossiped.
-    - before gossiping a individual piece of content, the bridge will perform a lookup to see if the content is already in the portal network. If it is, the content will not be gossiped.
-- `"--mode fourfours:single_hunter:10:50`: sample size = 10, threshold = 50
-    - same as the above hunter mode, but it will only gossip a single era1 file before exiting
-
-#### E2HS Bridge
+#### History Network E2HS Bridge
 
 - `"--mode e2hs --e2hs-range 100-200"`: gossip a block range from #100 to #200 (inclusive) using `E2HS` files as the data source
 - `"--mode e2hs --e2hs-range 1000-10000 --e2hs-randomize"`: randomize the order in which epochs from block range are gossiped
@@ -57,7 +36,6 @@ cargo run -p portal-bridge -- --executable-path ./target/debug/trin --epoch-accu
 
 #### State Subnetwork
 
-- `"--mode single:b100"`: backfill, always beginning from block #0 until the specified block (#100)
 - `"--mode single:r50-100"`: backfill, gossips state diffs for blocks in #50-#100 range (inclusive)
 - `"--mode snapshot:1000000"`: gossips a state snapshot at the respective block, in this example the state snapshot at block 1,000,000 will be gossiped. This mode is only used for the State Network.
 
@@ -68,7 +46,7 @@ You can specify the `--portal-subnetworks` flag for which network to run the bri
 - `"--portal-subnetworks history"`: Default value. Run the bridge for the history network.
 - `"--portal-subnetworks beacon"`: Run the bridge for the beacon network.
 - `"--portal-subnetworks history,beacon"`: Run the bridge for the history & beacon network.
-`  "--portal-subnetworks state"`: Run the bridge for the state network.
+- `"--portal-subnetworks state"`: Run the bridge for the state network.
     - Currently, the `"state"` network can only be run by itself!
 
 ### Test File example