docs: add flash loan, binding, and testing documentation

Additional documentation and testing infrastructure: ## Documentation Added - PROFIT_ROADMAP.md - 4-week profitability roadmap - PRODUCTION_DEPLOYMENT.md - Production deployment guide - docs/FLASH_LOAN_DEPLOYMENT_GUIDE.md - Flash loan implementation - docs/FLASH_LOAN_IMPLEMENTATION_SUMMARY.md - Flash loan summary - docs/BINDING_CONSISTENCY_GUIDE.md - Contract binding guidelines - docs/BINDING_QUICK_START.md - Quick start for bindings - docs/COMPLETE_FORK_TESTING_GUIDE.md - Fork testing guide ## Testing Scripts Added - scripts/generate-test-report.sh - Generate test reports - scripts/monitor-24h-test.sh - 24-hour monitoring - scripts/start-24h-test.sh - Start long-running tests - scripts/stop-24h-test.sh - Stop test runs 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
2025-10-27 05:51:44 -05:00
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+# MEV Bot Contract Binding Consistency Guide
+
+## Overview
+
+This document provides a comprehensive guide to ensuring contract binding consistency between the Mev-Alpha Solidity contracts and the mev-beta Go implementation.
+
+## Current Status
+
+### Findings
+
+1. **Existing Bindings**: The `/home/administrator/projects/mev-beta/bindings` directory contains Go bindings for contracts, but they may not be up-to-date with the latest Solidity contracts in Mev-Alpha.
+
+2. **Mixed Approach**: The codebase currently uses a combination of:
+   - Generated bindings (`bindings/contracts/*.go`)
+   - Manual ABI packing (`pkg/uniswap/contracts.go`, `pkg/arbitrum/abi_decoder.go`)
+   - Function selector computation (`pkg/common/selectors/selectors.go`)
+
+3. **Inconsistency Risk**: Using manual ABI calls alongside bindings creates potential for:
+   - Function signature mismatches
+   - Type conversion errors
+   - Missed contract updates
+   - Maintenance overhead
+
+## Recommended Approach
+
+### Phase 1: Generate Fresh Bindings
+
+**Script Created**: `/home/administrator/projects/mev-beta/scripts/generate-bindings.sh`
+
+This script will:
+1. Compile all Mev-Alpha Solidity contracts using Foundry
+2. Extract ABI from compiled JSON artifacts
+3. Generate Go bindings using `abigen`
+4. Organize bindings by contract type:
+   - `bindings/contracts/` - Core contracts (ArbitrageExecutor, BaseFlashSwapper)
+   - `bindings/interfaces/` - Interfaces (IArbitrage, IFlashSwapper)
+   - `bindings/dex/` - DEX-specific contracts (UniswapV2/V3FlashSwapper)
+   - `bindings/utils/` - Math and utility libraries
+   - `bindings/tokens/` - Token interfaces
+
+**To Run**:
+```bash
+cd /home/administrator/projects/mev-beta
+./scripts/generate-bindings.sh
+```
+
+**Note**: Compilation of Mev-Alpha contracts may take several minutes due to the large dependency tree (108 files).
+
+### Phase 2: Refactor Contract Interactions
+
+#### Current Anti-Patterns
+
+**❌ Manual ABI Packing** (`pkg/uniswap/contracts.go:156-160`):
+```go
+// DON'T DO THIS
+data, err := p.abi.Pack("slot0")
+if err != nil {
+    return nil, fmt.Errorf("failed to pack slot0 call: %w", err)
+}
+```
+
+**✅ Use Generated Bindings**:
+```go
+// DO THIS
+import "github.com/yourusername/mev-beta/bindings/tokens"
+
+pool, err := tokens.NewIUniswapV3PoolActions(poolAddress, client)
+if err != nil {
+    return nil, fmt.Errorf("failed to create pool binding: %w", err)
+}
+
+slot0, err := pool.Slot0(&bind.CallOpts{})
+if err != nil {
+    return nil, fmt.Errorf("failed to call slot0: %w", err)
+}
+```
+
+#### Files Requiring Updates
+
+1. **`pkg/uniswap/contracts.go`** (lines 155-332)
+   - Replace manual `abi.Pack()` calls with binding methods
+   - Use typed struct returns instead of `UnpackIntoInterface`
+
+2. **`pkg/arbitrum/abi_decoder.go`** (entire file)
+   - Consider using binding-generated events for parsing
+   - Keep for multi-protocol ABI decoding where bindings don't exist
+
+3. **`pkg/common/selectors/selectors.go`** (entire file)
+   - **KEEP THIS FILE** - selectors are useful for quick function ID checks
+   - But prefer bindings for actual contract calls
+
+4. **Other files using `crypto.Keccak256` for selectors**:
+   - `/home/administrator/projects/mev-beta/pkg/events/parser.go`
+   - `/home/administrator/projects/mev-beta/pkg/monitor/concurrent.go`
+   - `/home/administrator/projects/mev-beta/pkg/calldata/swaps.go`
+
+### Phase 3: Binding Usage Patterns
+
+#### Pattern 1: Contract Instantiation
+
+```go
+import (
+    "github.com/ethereum/go-ethereum/accounts/abi/bind"
+    "github.com/ethereum/go-ethereum/common"
+    "github.com/ethereum/go-ethereum/ethclient"
+
+    "github.com/yourusername/mev-beta/bindings/contracts"
+)
+
+// Create contract instance
+arbitrageExecutor, err := contracts.NewArbitrageExecutor(
+    common.HexToAddress("0x..."),
+    client,
+)
+if err != nil {
+    return err
+}
+```
+
+#### Pattern 2: Reading Contract State
+
+```go
+// Use binding methods for view functions
+isAuthorized, err := arbitrageExecutor.AuthorizedCallers(
+    &bind.CallOpts{},
+    userAddress,
+)
+if err != nil {
+    return err
+}
+```
+
+#### Pattern 3: Writing Transactions
+
+```go
+// Prepare transaction options
+auth, err := bind.NewKeyedTransactorWithChainID(privateKey, chainID)
+if err != nil {
+    return err
+}
+
+// Build arbitrage params using generated struct
+params := contracts.IArbitrageArbitrageParams{
+    Tokens:    []common.Address{token0, token1, token2},
+    Pools:     []common.Address{pool1, pool2},
+    Amounts:   []*big.Int{amount1, amount2},
+    SwapData:  [][]byte{data1, data2},
+    MinProfit: minProfit,
+}
+
+// Execute transaction
+tx, err := arbitrageExecutor.ExecuteArbitrage(auth, params)
+if err != nil {
+    return err
+}
+```
+
+#### Pattern 4: Event Parsing
+
+```go
+// Filter logs
+logs, err := client.FilterLogs(ctx, ethereum.FilterQuery{
+    FromBlock: startBlock,
+    ToBlock:   endBlock,
+    Addresses: []common.Address{contractAddress},
+})
+
+// Parse events using bindings
+for _, log := range logs {
+    event, err := arbitrageExecutor.ParseArbitrageExecuted(log)
+    if err != nil {
+        continue
+    }
+
+    // Use typed fields
+    fmt.Printf("Arbitrage executed by %s with profit %s\n",
+        event.Initiator.Hex(),
+        event.Profit.String(),
+    )
+}
+```
+
+### Phase 4: Contract Address Management
+
+**Created**: `bindings/addresses.go`
+
+This file centralizes all deployed contract addresses:
+
+```go
+package bindings
+
+import "github.com/ethereum/go-ethereum/common"
+
+var (
+    // Core contracts (update after deployment)
+    ArbitrageExecutorAddress     = common.HexToAddress("0x...")
+    UniswapV3FlashSwapperAddress = common.HexToAddress("0x...")
+
+    // Known DEX addresses on Arbitrum
+    UniswapV3Factory = common.HexToAddress("0x1F98431c8aD98523631AE4a59f267346ea31F984")
+    SushiswapRouter  = common.HexToAddress("0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506")
+    // ...
+}
+```
+
+**Usage**:
+```go
+import "github.com/yourusername/mev-beta/bindings"
+
+executor, err := contracts.NewArbitrageExecutor(
+    bindings.ArbitrageExecutorAddress,
+    client,
+)
+```
+
+## Benefits of Binding Consistency
+
+1. **Type Safety**: Compile-time checking of function signatures and parameters
+2. **Reduced Errors**: No manual ABI encoding/decoding mistakes
+3. **Easier Maintenance**: Contract updates automatically propagate via re-generation
+4. **Better IDE Support**: Auto-completion and type hints
+5. **Cleaner Code**: More readable and self-documenting
+
+## Migration Checklist
+
+- [x] Audit existing contract interaction patterns
+- [x] Create binding generation script
+- [ ] Compile Mev-Alpha Solidity contracts
+- [ ] Generate fresh Go bindings
+- [ ] Update `pkg/uniswap/contracts.go` to use bindings
+- [ ] Update `pkg/arbitrum/abi_decoder.go` where applicable
+- [ ] Update contract address constants
+- [ ] Test all contract interactions
+- [ ] Run integration tests
+- [ ] Update documentation
+
+## Testing Strategy
+
+### Unit Tests
+
+For each refactored file, ensure:
+1. All contract calls use bindings
+2. Error handling is preserved
+3. Return types are correctly converted
+
+### Integration Tests
+
+Test against:
+1. Arbitrum testnet (Sepolia)
+2. Local Anvil fork
+3. Mainnet fork (read-only)
+
+### Validation Script
+
+```bash
+# Check for manual ABI packing (should be minimal)
+grep -r "abi.Pack" pkg/ --exclude-dir=test
+
+# Check for manual Keccak256 selector computation (review each)
+grep -r "crypto.Keccak256" pkg/ --exclude-dir=test
+
+# Ensure bindings compile
+go build ./bindings/...
+
+# Run tests
+go test ./pkg/... -v
+```
+
+## Troubleshooting
+
+### Issue: abigen fails with "no type MyStruct"
+
+**Solution**: Ensure structs are defined in interfaces or export them from contracts.
+
+### Issue: Binding import conflicts
+
+**Solution**: Use package aliases:
+```go
+import (
+    contractsArbitrage "github.com/yourusername/mev-beta/bindings/contracts"
+    interfacesArbitrage "github.com/yourusername/mev-beta/bindings/interfaces"
+)
+```
+
+### Issue: Contract ABI changed but bindings not updated
+
+**Solution**: Re-run generation script:
+```bash
+./scripts/generate-bindings.sh
+go mod tidy
+```
+
+## Best Practices
+
+1. **Always regenerate bindings after contract changes**
+2. **Use semantic versioning for contract deployments**
+3. **Keep function selectors file for reference, but prefer bindings**
+4. **Document which contracts are deployed vs. mocks**
+5. **Use typed structs from bindings, not map[string]interface{}**
+
+## References
+
+- [go-ethereum abigen documentation](https://geth.ethereum.org/docs/tools/abigen)
+- [Solidity ABI Specification](https://docs.soliditylang.org/en/latest/abi-spec.html)
+- [Foundry Book - Deploying and Verifying](https://book.getfoundry.sh/forge/deploying)
+
+---
+
+**Last Updated**: 2025-10-26
+**Status**: In Progress - Awaiting contract compilation