logos-evm-eth-rpc-module

A Logos core module (Rust, rust-first cdylib): a proxyable, fail-closed Ethereum JSON-RPC client for the Logos multi-chain EVM wallet.

It stores configuration per chain (endpoint + proxy policy), so callers route by chainId alone. Every outbound request is built through a single fail-closed chokepoint (src/proxy.rs): if a chain is configured with proxyRequired and no usable proxy, the request is refused rather than sent in the clear. Uses reqwest with rustls-tls + socks (socks5h:// resolves DNS through the proxy — Tor-ready).

Contract (EthRpcModule)

Config: set_chain_config(chainId, {endpoint, proxy?, proxyRequired?, timeoutSecs?}), get_chain_config, remove_chain_config, list_chains. Calls keyed by chainId: verify_chain_id, block_number, get_balance, call, get_transaction_count, gas_price, fee_history, estimate_gas, send_raw_transaction, get_transaction_receipt, get_transaction_by_hash, raw_rpc.

Build & test

cd rust-lib && cargo test --no-default-features   # rpc + proxy cores (mock node + fail-closed)
nix build .#install                                # -> result/modules/eth_rpc_module/

src/proxy.rs is an inlined copy of the canonical logos-evm-net-proxy crate (the module builder only stages a module's rust-lib, so a sibling path dep isn't visible in the nix sandbox). Keep the two in sync.