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gasprice_test.go
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gasprice_test.go
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package gasprice
import (
"fmt"
"math/big"
"math/rand"
"testing"
"time"
"github.com/0xPolygon/polygon-edge/chain"
"github.com/0xPolygon/polygon-edge/crypto"
"github.com/0xPolygon/polygon-edge/helper/tests"
"github.com/0xPolygon/polygon-edge/types"
"github.com/stretchr/testify/mock"
"github.com/stretchr/testify/require"
"github.com/umbracle/ethgo"
)
func TestGasHelper_MaxPriorityFeePerGas(t *testing.T) {
t.Parallel()
var cases = []struct {
Name string
Expected *big.Int
Error bool
GetBackend func() Blockchain
}{
{
Name: "Chain just started",
Expected: DefaultGasHelperConfig.LastPrice,
GetBackend: func() Blockchain {
genesis := &types.Header{
Number: 0,
Hash: types.StringToHash("genesis"),
}
backend := new(backendMock)
backend.On("Header").Return(genesis)
backend.On("GetBlockByHash", mock.Anything, true).Return(&types.Block{
Header: genesis,
Transactions: []*types.Transaction{},
}, true)
return backend
},
},
{
Name: "Block does not exist",
Error: true,
GetBackend: func() Blockchain {
header := &types.Header{
Number: 0,
Hash: types.StringToHash("some header"),
}
backend := new(backendMock)
backend.On("Header").Return(header)
backend.On("GetBlockByHash", mock.Anything, true).Return(&types.Block{}, false)
return backend
},
},
{
Name: "Empty blocks",
Expected: DefaultGasHelperConfig.LastPrice, // should return last (default) price
GetBackend: func() Blockchain {
backend := createTestBlocks(t, 10)
return backend
},
},
{
Name: "All transactions by miner",
Expected: DefaultGasHelperConfig.LastPrice, // should return last (default) price
GetBackend: func() Blockchain {
backend := createTestBlocks(t, 10)
rand.Seed(time.Now().UTC().UnixNano())
senderKey, sender := tests.GenerateKeyAndAddr(t)
for _, b := range backend.blocks {
signer := crypto.NewSigner(backend.Config().Forks.At(b.Number()),
uint64(backend.Config().ChainID))
b.Transactions = make([]*types.Transaction, 3)
b.Header.Miner = sender.Bytes()
for i := 0; i < 3; i++ {
tx := types.NewTx(types.NewDynamicFeeTx(
types.WithGasTipCap(ethgo.Gwei(uint64(rand.Intn(200)))),
types.WithGasFeeCap(ethgo.Gwei(uint64(rand.Intn(200)+200))),
types.WithChainID(big.NewInt(backend.Config().ChainID)),
types.WithFrom(sender),
types.WithValue(ethgo.Ether(1)),
types.WithTo(&types.ZeroAddress),
))
tx, err := signer.SignTx(tx, senderKey)
require.NoError(t, err)
b.Transactions[i] = tx
}
}
return backend
},
},
{
Name: "All transactions have small effective tip",
Expected: DefaultGasHelperConfig.LastPrice, // should return last (default) price
GetBackend: func() Blockchain {
backend := createTestBlocks(t, 10)
createTestTxs(t, backend, 3, 1)
return backend
},
},
{
Name: "Number of blocks in chain smaller than numOfBlocksToCheck",
Expected: DefaultGasHelperConfig.LastPrice.Mul(
DefaultGasHelperConfig.LastPrice, big.NewInt(2)), // at least two times of default last price
GetBackend: func() Blockchain {
backend := createTestBlocks(t, 10)
createTestTxs(t, backend, 3, 200)
return backend
},
},
{
Name: "Number of blocks in chain higher than numOfBlocksToCheck",
Expected: DefaultGasHelperConfig.LastPrice.Mul(
DefaultGasHelperConfig.LastPrice, big.NewInt(2)), // at least two times of default last price
GetBackend: func() Blockchain {
backend := createTestBlocks(t, 30)
createTestTxs(t, backend, 3, 200)
return backend
},
},
{
Name: "Not enough transactions in first 20 blocks, so read some more blocks",
Expected: DefaultGasHelperConfig.LastPrice.Mul(
DefaultGasHelperConfig.LastPrice, big.NewInt(2)), // at least two times of default last price
GetBackend: func() Blockchain {
backend := createTestBlocks(t, 50)
createTestTxs(t, backend, 1, 200)
return backend
},
},
}
for _, tc := range cases {
tc := tc
t.Run(tc.Name, func(t *testing.T) {
t.Parallel()
backend := tc.GetBackend()
gasHelper, err := NewGasHelper(DefaultGasHelperConfig, backend)
require.NoError(t, err)
price, err := gasHelper.MaxPriorityFeePerGas()
if tc.Error {
require.Error(t, err)
} else {
require.NoError(t, err)
require.True(t, price.Cmp(tc.Expected) >= 0)
}
})
}
}
func createTestBlocks(t *testing.T, numOfBlocks int) *backendMock {
t.Helper()
backend := &backendMock{blocks: make(map[types.Hash]*types.Block), blocksByNumber: make(map[uint64]*types.Block)}
genesis := &types.Block{
Header: &types.Header{
Number: 0,
Hash: types.StringToHash("genesis"),
Miner: types.ZeroAddress.Bytes(),
BaseFee: chain.GenesisBaseFee,
},
}
backend.blocks[genesis.Hash()] = genesis
backend.blocksByNumber[genesis.Number()] = genesis
currentBlock := genesis
for i := 1; i <= numOfBlocks; i++ {
block := &types.Block{
Header: &types.Header{
Number: uint64(i),
Hash: types.BytesToHash([]byte(fmt.Sprintf("Block %d", i))),
Miner: types.ZeroAddress.Bytes(),
ParentHash: currentBlock.Hash(),
BaseFee: chain.GenesisBaseFee,
},
}
backend.blocksByNumber[block.Number()] = block
backend.blocks[block.Hash()] = block
currentBlock = block
}
backend.On("Header").Return(currentBlock.Header)
return backend
}
func createTestTxs(t *testing.T, backend *backendMock, numOfTxsPerBlock, txCap int) {
t.Helper()
rand.Seed(time.Now().UTC().UnixNano())
for _, b := range backend.blocks {
signer := crypto.NewSigner(backend.Config().Forks.At(b.Number()),
uint64(backend.Config().ChainID))
b.Transactions = make([]*types.Transaction, numOfTxsPerBlock)
for i := 0; i < numOfTxsPerBlock; i++ {
senderKey, sender := tests.GenerateKeyAndAddr(t)
tx := types.NewTx(types.NewDynamicFeeTx(
types.WithGasTipCap(ethgo.Gwei(uint64(rand.Intn(txCap)))),
types.WithGasFeeCap(ethgo.Gwei(uint64(rand.Intn(txCap)+txCap))),
types.WithChainID(big.NewInt(backend.Config().ChainID)),
types.WithFrom(sender),
types.WithValue(ethgo.Ether(1)),
types.WithTo(&types.ZeroAddress),
))
tx, err := signer.SignTx(tx, senderKey)
require.NoError(t, err)
b.Transactions[i] = tx
}
}
}
var _ Blockchain = (*backendMock)(nil)
type backendMock struct {
mock.Mock
blocks map[types.Hash]*types.Block
blocksByNumber map[uint64]*types.Block
}
func (b *backendMock) Header() *types.Header {
args := b.Called()
return args.Get(0).(*types.Header)
}
func (b *backendMock) GetBlockByHash(hash types.Hash, full bool) (*types.Block, bool) {
if len(b.blocks) == 0 {
args := b.Called(hash, full)
return args.Get(0).(*types.Block), args.Get(1).(bool)
}
block, exists := b.blocks[hash]
return block, exists
}
func (b *backendMock) Config() *chain.Params {
return &chain.Params{
ChainID: 1,
Forks: chain.AllForksEnabled,
}
}