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eip1559_test.go
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eip1559_test.go
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// Copyright 2021 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package misc
import (
"math/big"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/params"
)
// copyConfig does a _shallow_ copy of a given config. Safe to set new values, but
// do not use e.g. SetInt() on the numbers. For testing only
func copyConfig(original *params.ChainConfig) *params.ChainConfig {
return ¶ms.ChainConfig{
ChainID: original.ChainID,
HomesteadBlock: original.HomesteadBlock,
DAOForkBlock: original.DAOForkBlock,
DAOForkSupport: original.DAOForkSupport,
EIP150Block: original.EIP150Block,
EIP155Block: original.EIP155Block,
EIP158Block: original.EIP158Block,
ByzantiumBlock: original.ByzantiumBlock,
ConstantinopleBlock: original.ConstantinopleBlock,
PetersburgBlock: original.PetersburgBlock,
IstanbulBlock: original.IstanbulBlock,
MuirGlacierBlock: original.MuirGlacierBlock,
BerlinBlock: original.BerlinBlock,
LondonBlock: original.LondonBlock,
TerminalTotalDifficulty: original.TerminalTotalDifficulty,
Ethash: original.Ethash,
Clique: original.Clique,
}
}
func config() *params.ChainConfig {
config := copyConfig(params.TestChainConfig)
config.LondonBlock = big.NewInt(5)
return config
}
// TestBlockGasLimits tests the gasLimit checks for blocks both across
// the EIP-1559 boundary and post-1559 blocks
func TestBlockGasLimits(t *testing.T) {
initial := new(big.Int).SetUint64(params.InitialBaseFee)
for i, tc := range []struct {
pGasLimit uint64
pNum int64
gasLimit uint64
ok bool
}{
// Transitions from non-london to london
{10000000, 4, 20000000, true}, // No change
{10000000, 4, 20019530, true}, // Upper limit
{10000000, 4, 20019531, false}, // Upper +1
{10000000, 4, 19980470, true}, // Lower limit
{10000000, 4, 19980469, false}, // Lower limit -1
// London to London
{20000000, 5, 20000000, true},
{20000000, 5, 20019530, true}, // Upper limit
{20000000, 5, 20019531, false}, // Upper limit +1
{20000000, 5, 19980470, true}, // Lower limit
{20000000, 5, 19980469, false}, // Lower limit -1
{40000000, 5, 40039061, true}, // Upper limit
{40000000, 5, 40039062, false}, // Upper limit +1
{40000000, 5, 39960939, true}, // lower limit
{40000000, 5, 39960938, false}, // Lower limit -1
} {
parent := &types.Header{
GasUsed: tc.pGasLimit / 2,
GasLimit: tc.pGasLimit,
BaseFee: initial,
Number: big.NewInt(tc.pNum),
}
header := &types.Header{
GasUsed: tc.gasLimit / 2,
GasLimit: tc.gasLimit,
BaseFee: initial,
Number: big.NewInt(tc.pNum + 1),
}
err := VerifyEIP1559Header(config(), parent, header)
if tc.ok && err != nil {
t.Errorf("test %d: Expected valid header: %s", i, err)
}
if !tc.ok && err == nil {
t.Errorf("test %d: Expected invalid header", i)
}
}
}
// TestCalcBaseFee assumes all blocks are 1559-blocks
func TestCalcBaseFee(t *testing.T) {
tests := []struct {
parentBaseFee int64
parentGasLimit uint64
parentGasUsed uint64
expectedBaseFee int64
}{
{params.InitialBaseFee, 20000000, 10000000, params.InitialBaseFee}, // usage == target
{params.InitialBaseFee, 20000000, 9000000, 987500000}, // usage below target
{params.InitialBaseFee, 20000000, 11000000, 1012500000}, // usage above target
}
for i, test := range tests {
parent := &types.Header{
Number: common.Big32,
GasLimit: test.parentGasLimit,
GasUsed: test.parentGasUsed,
BaseFee: big.NewInt(test.parentBaseFee),
}
if have, want := CalcBaseFee(config(), parent), big.NewInt(test.expectedBaseFee); have.Cmp(want) != 0 {
t.Errorf("test %d: have %d want %d, ", i, have, want)
}
}
}