Add MEV bundle support foundation (Phase 1)

CHANGELOG.md

@@ -1,5 +1,43 @@
 # Changelog
 
+## UNRELEASED
+
+### Features
+
+- Add MEV (Maximum Extractable Value) support with Flashbots integration
+  - New `Ethers.MEV` module providing high-level API for bundle operations
+  - `Ethers.MEV.Bundle` for creating and validating transaction bundles
+  - `Ethers.MEV.Provider` behaviour for extensible MEV relay support
+  - Full Flashbots mainnet provider implementation with Sepolia support
+  - Bundle monitoring with automatic status tracking
+  - Conflict detection for `nonce`, `gas price`, and `balance` issues
+  - Retry strategies with exponential, linear, and fibonacci backoff
+  - Circuit breaker pattern for fault tolerance
+  - Health monitoring and telemetry integration
+  - Performance optimizations with connection pooling and ETS caching
+  - Pipeline API for functional composition of MEV operations
+  - Comprehensive test coverage and documentation
+
+### New Modules
+
+- `Ethers.MEV` - Main MEV interface with pipeline API
+- `Ethers.MEV.Bundle` - Bundle creation and validation
+- `Ethers.MEV.Provider` - Provider behaviour definition
+- `Ethers.MEV.Providers.Flashbots` - Flashbots relay implementation
+- `Ethers.MEV.BundleMonitor` - Automated bundle status tracking
+- `Ethers.MEV.ConflictDetector` - Transaction conflict analysis
+- `Ethers.MEV.RetryStrategy` - Configurable retry strategies
+- `Ethers.MEV.RetryPipeline` - Functional retry pipeline
+- `Ethers.MEV.CircuitBreaker` - Fault tolerance pattern
+- `Ethers.MEV.HealthMonitor` - System health tracking
+- `Ethers.MEV.Supervisor` - OTP supervision tree
+- `Ethers.MEV.TaskRunner` - Supervised async execution
+- `Ethers.MEV.Telemetry` - Metrics and observability
+- `Ethers.MEV.Cache` - ETS-based caching layer
+- `Ethers.MEV.ConnectionPool` - HTTP connection pooling
+- `Ethers.MEV.Utils` - Shared utility functions
+- `Ethers.Signer.Flashbots` - EIP-191 signing for Flashbots
+
 ## v0.6.7 (2025-05-09)
 
 ### Bug Fixes

README.md

@@ -21,6 +21,7 @@ It leverages Elixir's metaprogramming capabilities to provide a seamless develop
 - **Flexible Signing**: Extensible signer support with [built-in ones](https://hexdocs.pm/ethers/readme.html#signing-transactions)
 - **Event Handling**: Easy filtering and retrieval of blockchain events
 - **Multicall Support**: Ability to easily perform multiple `eth_call`s using [Multicall 2/3](https://hexdocs.pm/ethers/Ethers.Multicall.html)
+- **MEV Support**: Built-in support for MEV bundle creation and submission (Flashbots and compatible relays)
 - **Type Safety**: Native Elixir types for all contract interactions
 - **ENS Support**: Out of the box [Ethereum Name Service (ENS)](https://ens.domains/) support
 - **Comprehensive Documentation**: Auto-generated docs for all contract functions
@@ -118,6 +119,29 @@ filter = MyToken.EventFilters.transfer(from_address, nil)
 {:ok, events} = Ethers.get_logs(filter)
 ```
 
+### MEV Bundle Submission
+
+```elixir
+# Create and send a bundle of transactions
+bundle = 
+  [signed_tx1, signed_tx2]
+  |> Ethers.MEV.bundle(block_number: next_block)
+  |> Ethers.MEV.send(provider: Ethers.MEV.Flashbots)
+
+# Or with more control
+{:ok, bundle} = Ethers.MEV.create_bundle(
+  [signed_tx1, signed_tx2],
+  block_number: 12345678,
+  min_timestamp: 1234567890,
+  max_timestamp: 1234567900
+)
+
+{:ok, bundle_hash} = Ethers.MEV.send_bundle(bundle, 
+  provider: Ethers.MEV.Flashbots,
+  signer: signer
+)
+```
+
 ## Documentation
 
 Complete API documentation is available at [HexDocs](https://hexdocs.pm/ethers).