Files
mev-beta/pkg/execution/transaction_builder_test.go
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test(execution): add comprehensive test suite for execution engine
Add comprehensive unit tests for all execution engine components:

Component Test Coverage:
- UniswapV2 encoder: 15 test cases + benchmarks
- UniswapV3 encoder: 20 test cases + benchmarks
- Curve encoder: 16 test cases + benchmarks
- Flashloan manager: 18 test cases + benchmarks
- Transaction builder: 15 test cases + benchmarks
- Risk manager: 25 test cases + benchmarks
- Executor: 20 test cases + benchmarks

Test Categories:
- Happy path scenarios
- Error handling and edge cases
- Zero/invalid inputs
- Boundary conditions (max amounts, limits)
- Concurrent operations (nonce management)
- Configuration validation
- State management

Key Test Features:
- Protocol-specific encoding validation
- ABI encoding correctness
- Gas calculation accuracy
- Slippage calculation
- Nonce management thread safety
- Circuit breaker behavior
- Risk assessment rules
- Transaction lifecycle

Total: 129 test cases + performance benchmarks
Target: 100% test coverage for execution engine

Related to Phase 4 (Execution Engine) implementation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-10 18:24:58 +01:00

561 lines
18 KiB
Go

package execution
import (
"context"
"log/slog"
"math/big"
"os"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/your-org/mev-bot/pkg/arbitrage"
mevtypes "github.com/your-org/mev-bot/pkg/types"
)
func TestDefaultTransactionBuilderConfig(t *testing.T) {
config := DefaultTransactionBuilderConfig()
assert.NotNil(t, config)
assert.Equal(t, uint16(50), config.DefaultSlippageBPS)
assert.Equal(t, uint16(300), config.MaxSlippageBPS)
assert.Equal(t, float64(1.2), config.GasLimitMultiplier)
assert.Equal(t, uint64(3000000), config.MaxGasLimit)
assert.Equal(t, 5*time.Minute, config.DefaultDeadline)
}
func TestNewTransactionBuilder(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161) // Arbitrum
builder := NewTransactionBuilder(nil, chainID, logger)
assert.NotNil(t, builder)
assert.NotNil(t, builder.config)
assert.Equal(t, chainID, builder.chainID)
assert.NotNil(t, builder.uniswapV2Encoder)
assert.NotNil(t, builder.uniswapV3Encoder)
assert.NotNil(t, builder.curveEncoder)
}
func TestTransactionBuilder_BuildTransaction_SingleSwap_UniswapV2(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-1",
Type: arbitrage.OpportunityTypeTwoPool,
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(1e18),
OutputToken: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
OutputAmount: big.NewInt(1500e6),
Path: []arbitrage.SwapStep{
{
Protocol: mevtypes.ProtocolUniswapV2,
TokenIn: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
TokenOut: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
AmountIn: big.NewInt(1e18),
AmountOut: big.NewInt(1500e6),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
},
},
EstimatedGas: 150000,
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
tx, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
require.NoError(t, err)
assert.NotNil(t, tx)
assert.NotEmpty(t, tx.To)
assert.NotEmpty(t, tx.Data)
assert.NotNil(t, tx.Value)
assert.Greater(t, tx.GasLimit, uint64(0))
assert.NotNil(t, tx.MaxFeePerGas)
assert.NotNil(t, tx.MaxPriorityFeePerGas)
assert.NotNil(t, tx.MinOutput)
assert.False(t, tx.RequiresFlashloan)
assert.Equal(t, uint16(50), tx.Slippage) // Default slippage
}
func TestTransactionBuilder_BuildTransaction_SingleSwap_UniswapV3(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-2",
Type: arbitrage.OpportunityTypeTwoPool,
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(1e18),
OutputToken: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
OutputAmount: big.NewInt(1500e6),
Path: []arbitrage.SwapStep{
{
Protocol: mevtypes.ProtocolUniswapV3,
TokenIn: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
TokenOut: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
AmountIn: big.NewInt(1e18),
AmountOut: big.NewInt(1500e6),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
Fee: 3000, // 0.3%
},
},
EstimatedGas: 150000,
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
tx, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
require.NoError(t, err)
assert.NotNil(t, tx)
assert.NotEmpty(t, tx.To)
assert.NotEmpty(t, tx.Data)
assert.Equal(t, UniswapV3SwapRouterAddress, tx.To)
}
func TestTransactionBuilder_BuildTransaction_MultiHop_UniswapV2(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-3",
Type: arbitrage.OpportunityTypeMultiHop,
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(1e18),
OutputToken: common.HexToAddress("0x2f2a2543B76A4166549F7aaB2e75Bef0aefC5B0f"),
OutputAmount: big.NewInt(1e7),
Path: []arbitrage.SwapStep{
{
Protocol: mevtypes.ProtocolUniswapV2,
TokenIn: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
TokenOut: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
AmountIn: big.NewInt(1e18),
AmountOut: big.NewInt(1500e6),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
},
{
Protocol: mevtypes.ProtocolUniswapV2,
TokenIn: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
TokenOut: common.HexToAddress("0x2f2a2543B76A4166549F7aaB2e75Bef0aefC5B0f"),
AmountIn: big.NewInt(1500e6),
AmountOut: big.NewInt(1e7),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000002"),
},
},
EstimatedGas: 250000,
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
tx, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
require.NoError(t, err)
assert.NotNil(t, tx)
assert.NotEmpty(t, tx.To)
assert.NotEmpty(t, tx.Data)
assert.Equal(t, UniswapV2RouterAddress, tx.To)
}
func TestTransactionBuilder_BuildTransaction_MultiHop_UniswapV3(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-4",
Type: arbitrage.OpportunityTypeMultiHop,
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(1e18),
OutputToken: common.HexToAddress("0x2f2a2543B76A4166549F7aaB2e75Bef0aefC5B0f"),
OutputAmount: big.NewInt(1e7),
Path: []arbitrage.SwapStep{
{
Protocol: mevtypes.ProtocolUniswapV3,
TokenIn: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
TokenOut: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
AmountIn: big.NewInt(1e18),
AmountOut: big.NewInt(1500e6),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
Fee: 3000,
},
{
Protocol: mevtypes.ProtocolUniswapV3,
TokenIn: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
TokenOut: common.HexToAddress("0x2f2a2543B76A4166549F7aaB2e75Bef0aefC5B0f"),
AmountIn: big.NewInt(1500e6),
AmountOut: big.NewInt(1e7),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000002"),
Fee: 500,
},
},
EstimatedGas: 250000,
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
tx, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
require.NoError(t, err)
assert.NotNil(t, tx)
assert.Equal(t, UniswapV3SwapRouterAddress, tx.To)
}
func TestTransactionBuilder_BuildTransaction_Curve(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-5",
Type: arbitrage.OpportunityTypeTwoPool,
InputToken: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
InputAmount: big.NewInt(1500e6),
OutputToken: common.HexToAddress("0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9"),
OutputAmount: big.NewInt(1500e6),
Path: []arbitrage.SwapStep{
{
Protocol: mevtypes.ProtocolCurve,
TokenIn: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
TokenOut: common.HexToAddress("0xFd086bC7CD5C481DCC9C85ebE478A1C0b69FCbb9"),
AmountIn: big.NewInt(1500e6),
AmountOut: big.NewInt(1500e6),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
},
},
EstimatedGas: 200000,
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
tx, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
require.NoError(t, err)
assert.NotNil(t, tx)
// For Curve, tx.To should be the pool address
assert.Equal(t, opp.Path[0].PoolAddress, tx.To)
}
func TestTransactionBuilder_BuildTransaction_EmptyPath(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-6",
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(1e18),
Path: []arbitrage.SwapStep{},
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
_, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
assert.Error(t, err)
assert.Contains(t, err.Error(), "empty swap path")
}
func TestTransactionBuilder_BuildTransaction_UnsupportedProtocol(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-7",
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(1e18),
Path: []arbitrage.SwapStep{
{
Protocol: "unknown_protocol",
TokenIn: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
TokenOut: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
AmountIn: big.NewInt(1e18),
AmountOut: big.NewInt(1500e6),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
},
},
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
_, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
assert.Error(t, err)
assert.Contains(t, err.Error(), "unsupported protocol")
}
func TestTransactionBuilder_calculateMinOutput(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
tests := []struct {
name string
outputAmount *big.Int
slippageBPS uint16
expectedMin *big.Int
}{
{
name: "0.5% slippage",
outputAmount: big.NewInt(1000e6),
slippageBPS: 50,
expectedMin: big.NewInt(995e6), // 0.5% less
},
{
name: "1% slippage",
outputAmount: big.NewInt(1000e6),
slippageBPS: 100,
expectedMin: big.NewInt(990e6), // 1% less
},
{
name: "3% slippage",
outputAmount: big.NewInt(1000e6),
slippageBPS: 300,
expectedMin: big.NewInt(970e6), // 3% less
},
{
name: "Zero slippage",
outputAmount: big.NewInt(1000e6),
slippageBPS: 0,
expectedMin: big.NewInt(1000e6), // No change
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
minOutput := builder.calculateMinOutput(tt.outputAmount, tt.slippageBPS)
assert.Equal(t, tt.expectedMin, minOutput)
})
}
}
func TestTransactionBuilder_calculateGasLimit(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
tests := []struct {
name string
estimatedGas uint64
expectedMin uint64
expectedMax uint64
}{
{
name: "Normal gas estimate",
estimatedGas: 150000,
expectedMin: 180000, // 150k * 1.2
expectedMax: 180001,
},
{
name: "High gas estimate",
estimatedGas: 2500000,
expectedMin: 3000000, // Capped at max
expectedMax: 3000000,
},
{
name: "Zero gas estimate",
estimatedGas: 0,
expectedMin: 0, // 0 * 1.2
expectedMax: 0,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
gasLimit := builder.calculateGasLimit(tt.estimatedGas)
assert.GreaterOrEqual(t, gasLimit, tt.expectedMin)
assert.LessOrEqual(t, gasLimit, tt.expectedMax)
})
}
}
func TestTransactionBuilder_SignTransaction(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
// Create a test private key
privateKey, err := crypto.GenerateKey()
require.NoError(t, err)
tx := &SwapTransaction{
To: common.HexToAddress("0x0000000000000000000000000000000000000001"),
Data: []byte{0x01, 0x02, 0x03, 0x04},
Value: big.NewInt(0),
GasLimit: 180000,
MaxFeePerGas: big.NewInt(100e9), // 100 gwei
MaxPriorityFeePerGas: big.NewInt(2e9), // 2 gwei
}
nonce := uint64(5)
signedTx, err := builder.SignTransaction(tx, nonce, crypto.FromECDSA(privateKey))
require.NoError(t, err)
assert.NotNil(t, signedTx)
assert.Equal(t, nonce, signedTx.Nonce())
assert.Equal(t, tx.To, *signedTx.To())
assert.Equal(t, tx.GasLimit, signedTx.Gas())
assert.Equal(t, tx.MaxFeePerGas, signedTx.GasFeeCap())
assert.Equal(t, tx.MaxPriorityFeePerGas, signedTx.GasTipCap())
}
func TestTransactionBuilder_SignTransaction_InvalidKey(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
tx := &SwapTransaction{
To: common.HexToAddress("0x0000000000000000000000000000000000000001"),
Data: []byte{0x01, 0x02, 0x03, 0x04},
Value: big.NewInt(0),
GasLimit: 180000,
MaxFeePerGas: big.NewInt(100e9),
MaxPriorityFeePerGas: big.NewInt(2e9),
}
nonce := uint64(5)
invalidKey := []byte{0x01, 0x02, 0x03} // Too short
_, err := builder.SignTransaction(tx, nonce, invalidKey)
assert.Error(t, err)
}
func TestTransactionBuilder_CustomSlippage(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
config := DefaultTransactionBuilderConfig()
config.DefaultSlippageBPS = 100 // 1% slippage
builder := NewTransactionBuilder(config, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-8",
Type: arbitrage.OpportunityTypeTwoPool,
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(1e18),
OutputToken: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
OutputAmount: big.NewInt(1000e6),
Path: []arbitrage.SwapStep{
{
Protocol: mevtypes.ProtocolUniswapV2,
TokenIn: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
TokenOut: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
AmountIn: big.NewInt(1e18),
AmountOut: big.NewInt(1000e6),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
},
},
EstimatedGas: 150000,
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
tx, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
require.NoError(t, err)
assert.Equal(t, uint16(100), tx.Slippage)
// MinOutput should be 990e6 (1% slippage on 1000e6)
assert.Equal(t, big.NewInt(990e6), tx.MinOutput)
}
func TestTransactionBuilder_ZeroAmounts(t *testing.T) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "test-opp-9",
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(0),
OutputToken: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
OutputAmount: big.NewInt(0),
Path: []arbitrage.SwapStep{
{
Protocol: mevtypes.ProtocolUniswapV2,
TokenIn: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
TokenOut: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
AmountIn: big.NewInt(0),
AmountOut: big.NewInt(0),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
},
},
EstimatedGas: 150000,
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
tx, err := builder.BuildTransaction(context.Background(), opp, fromAddress)
require.NoError(t, err)
assert.Equal(t, big.NewInt(0), tx.MinOutput)
}
// Benchmark tests
func BenchmarkTransactionBuilder_BuildTransaction(b *testing.B) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
opp := &arbitrage.Opportunity{
ID: "bench-opp",
Type: arbitrage.OpportunityTypeTwoPool,
InputToken: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
InputAmount: big.NewInt(1e18),
OutputToken: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
OutputAmount: big.NewInt(1500e6),
Path: []arbitrage.SwapStep{
{
Protocol: mevtypes.ProtocolUniswapV2,
TokenIn: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"),
TokenOut: common.HexToAddress("0xFF970a61A04b1cA14834A43f5dE4533eBDDB5CC8"),
AmountIn: big.NewInt(1e18),
AmountOut: big.NewInt(1500e6),
PoolAddress: common.HexToAddress("0x0000000000000000000000000000000000000001"),
},
},
EstimatedGas: 150000,
}
fromAddress := common.HexToAddress("0x0000000000000000000000000000000000000002")
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = builder.BuildTransaction(context.Background(), opp, fromAddress)
}
}
func BenchmarkTransactionBuilder_SignTransaction(b *testing.B) {
logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
chainID := big.NewInt(42161)
builder := NewTransactionBuilder(nil, chainID, logger)
privateKey, _ := crypto.GenerateKey()
tx := &SwapTransaction{
To: common.HexToAddress("0x0000000000000000000000000000000000000001"),
Data: []byte{0x01, 0x02, 0x03, 0x04},
Value: big.NewInt(0),
GasLimit: 180000,
MaxFeePerGas: big.NewInt(100e9),
MaxPriorityFeePerGas: big.NewInt(2e9),
}
nonce := uint64(5)
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _ = builder.SignTransaction(tx, nonce, crypto.FromECDSA(privateKey))
}
}