refactor: remove the trace_decoder crate

.github/CODEOWNERS

@@ -3,5 +3,4 @@
 /zero/ @muursh @Nashtare @atanmarko
 /smt_trie/ @0xaatif @muursh @Nashtare
 /mpt_trie/ @0xaatif @Nashtare @muursh
-/trace_decoder/ @0xaatif @muursh @Nashtare
 .github/ @0xaatif @atanmarko @muursh @Nashtare

.github/labeler.yml

@@ -8,11 +8,6 @@
 - changed-files:
   - any-glob-to-any-file: evm_arithmetization/**
 
-# Add 'crate: trace_decoder' label to any changes within 'trace_decoder' folder.
-'crate: trace_decoder':
-- changed-files:
-  - any-glob-to-any-file: trace_decoder/**
-
 # Add 'crate: zero_bin' label to any changes within 'zero' folder.
 'crate: zero_bin':
 - changed-files:

.github/workflows/ci.yml

@@ -37,39 +37,6 @@ jobs:
 
       - name: Test in mpt_trie subdirectory
         run: cargo test --manifest-path mpt_trie/Cargo.toml
-        env:
-          RUSTFLAGS: -Copt-level=3 -Cdebug-assertions -Coverflow-checks=y -Cdebuginfo=0
-          RUST_LOG: 1
-          CARGO_INCREMENTAL: 1
-          RUST_BACKTRACE: 1
-
-  test_trace_decoder:
-    name: Test trace_decoder
-    runs-on: zero-ci
-    timeout-minutes: 30
-    env:
-      RUST_LOG: info
-      CARGO_INCREMENTAL: 1
-      RUST_BACKTRACE: 1
-
-    if: ${{ ! contains(toJSON(github.event.commits.*.message), '[skip-ci]') }}
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v4
-
-      - name: Install nightly toolchain
-        uses: dtolnay/rust-toolchain@nightly
-
-      - name: Set up rust cache
-        uses: Swatinem/rust-cache@v2
-        with:
-          cache-on-failure: true
-
-      - name: build # build separately so test logs are actually nice
-        run: cargo build --tests --manifest-path trace_decoder/Cargo.toml
-
-      - name: test
-        run: cargo test --release --manifest-path trace_decoder/Cargo.toml -- --nocapture
 
   test_evm_arithmetization:
     name: Test evm_arithmetization
@@ -117,12 +84,6 @@ jobs:
         run: |
           cargo test --manifest-path zero/Cargo.toml
 
-        env:
-          RUSTFLAGS: -Copt-level=3 -Cdebug-assertions -Coverflow-checks=y -Cdebuginfo=0
-          RUST_LOG: 1
-          CARGO_INCREMENTAL: 1
-          RUST_BACKTRACE: 1
-
   test_zk_evm_proc_macro:
     name: Test zk_evm_proc_macro
     runs-on: ubuntu-latest
@@ -142,11 +103,6 @@ jobs:
 
       - name: Test in proc_macro subdirectory
         run: cargo test --manifest-path proc_macro/Cargo.toml
-        env:
-          RUSTFLAGS: -Copt-level=3 -Cdebug-assertions -Coverflow-checks=y -Cdebuginfo=0
-          RUST_LOG: 1
-          CARGO_INCREMENTAL: 1
-          RUST_BACKTRACE: 1
 
   simple_proof_regular:
     name: Execute bash script to generate and verify a proof for a small block.

Cargo.toml

@@ -6,7 +6,6 @@ members = [
   "mpt_trie",
   "proc_macro",
   "smt_trie",
-  "trace_decoder",
   "zero",
 ]
 resolver = "2"
@@ -104,7 +103,6 @@ winnow = "0.6.13"
 evm_arithmetization = { path = "evm_arithmetization", version = "0.4.0", default-features = false }
 mpt_trie = { path = "mpt_trie", version = "0.4.1" }
 smt_trie = { path = "smt_trie", version = "0.1.1" }
-trace_decoder = { path = "trace_decoder", version = "0.6.0", default-features = false }
 zk_evm_common = { path = "common", version = "0.1.0" }
 zk_evm_proc_macro = { path = "proc_macro", version = "0.1.0" }
 zero = { path = "zero", default-features = false }

README.md

@@ -12,9 +12,6 @@ This repository contains the following Rust crates:
 
 * [smt_trie](./smt_trie/README.md): A collection of types and functions to work with Polygon Hermez Sparse Merkle Trees (SMT).
 
-* [trace_decoder](./trace_decoder/Cargo.toml): Flexible protocol designed to process Ethereum clients trace payloads into an IR format that can be
-understood by the zkEVM prover.
-
 * [evm_arithmetization](./evm_arithmetization/README.md): Defines all the STARK constraints and recursive circuits to generate succinct proofs of EVM execution.
 It uses starky and plonky2 as proving backend: https://github.com/0xPolygonZero/plonky2.
 
@@ -32,24 +29,20 @@ TODO: Update mermaid chart with `smt_trie` once type-2 is plugged in.
 %%{init: {'theme':'dark'}}%%
 flowchart LR
     subgraph ps [proving systems]
-    A1{{plonky2}}
-    A2{{starky}}
+        A1{{plonky2}}
+        A2{{starky}}
     end
 
     ps --> zk_evm
 
-    subgraph zk_evm [zk_evm]
-    B[mpt_trie]
-    C[evm_arithmetization]
-    D[trace_decoder]
+    subgraph zk_evm
+        B[mpt_trie]
+        C[evm_arithmetization]
 
-    B --> C
-    B ---> D
-    C ---> D
+        B --> C
 
-    F{zero-bin}
-    C --> F
-    D --> F
+        F{zero-bin}
+        C --> F
     end
 ```