feat(precompiles): add Token Duality precompile

Implements Celo-style token duality pattern allowing native tokens to
function as ERC-20 compatible tokens without wrapping.

Features:
- Native token transfers via precompile at 0x00..00FD
- Admin + allowlist authorization model
- Per-call and per-block transfer rate limiting
- Chainspec configuration for admin, caps and activation height

The precompile provides the transfer mechanism; full ERC-20 compatibility
requires a wrapper contract that calls this precompile and provides
standard ERC-20 views and events.

Author: AndeLabs

Cargo.lock

@@ -116,6 +116,7 @@ revm-inspector = { version = "12.0.1" }
 # Core dependencies
 eyre = "0.6"
 tracing = "0.1"
+parking_lot = "0.12"
 tokio = { version = "1.38", features = ["full"] }
 serde = { version = "=1.0.228", default-features = false, features = ["derive"] }
 serde_json = "1.0"

Cargo.toml

@@ -24,3 +24,4 @@ bytes = "1.5.0"
 eyre = "0.6.11"
 thiserror = "1.0.58"
 tracing = { workspace = true }
+parking_lot = { workspace = true }

crates/ev-precompiles/Cargo.toml

@@ -1 +1,53 @@
+//! # Evolve Custom EVM Precompiles
+//!
+//! This crate provides precompiled contracts that extend the EVM with
+//! Evolve-specific functionality for sovereign rollups.
+//!
+//! ## Available Precompiles
+//!
+//! | Address | Name | Description |
+//! |---------|------|-------------|
+//! | `0xF100` | [`mint`] | Native token supply management (mint/burn) |
+//! | `0x00FD` | [`token_duality`] | Native token as ERC-20 (Celo-style transfer) |
+//!
+//! ## Architecture
+//!
+//! All precompiles follow the same pattern:
+//!
+//! 1. **Authorization**: Admin-based access control with runtime allowlist
+//! 2. **State Management**: Direct balance manipulation via `EvmInternals`
+//! 3. **Safety**: Checked arithmetic, zero-address validation, rate limiting
+//! 4. **Consistency**: Follows Reth/Revm precompile conventions
+//!
+//! ## Integration
+//!
+//! Precompiles are registered via `ev_revm::factory::EvEvmFactory` which
+//! wraps the standard `EthEvmFactory` and injects custom precompiles.
+//!
+//! ```ignore
+//! use ev_revm::factory::EvEvmFactory;
+//! use ev_precompiles::token_duality::TokenDualityConfig;
+//!
+//! let factory = EvEvmFactory::with_token_duality(
+//!     EthEvmFactory::default(),
+//!     None, // base fee redirect
+//!     Some(mint_admin),
+//!     Some(TokenDualityConfig::with_admin(token_admin)),
+//! );
+//! ```
+//!
+//! ## Security Considerations
+//!
+//! - All precompiles require explicit admin configuration
+//! - Rate limiting prevents abuse (per-call and per-block caps)
+//! - State changes are atomic (all-or-nothing)
+//! - No reentrancy risk (native execution)
+//!
+//! ## References
+//!
+//! - [Celo Token Duality](https://specs.celo.org/token_duality.html)
+//! - [Reth Precompiles](https://reth.rs)
+//! - [Revm Documentation](https://bluealloy.github.io/revm/)
+
 pub mod mint;
+pub mod token_duality;