feat: Waku v2 bridge

Issue #12610

vendor/github.com/ethereum/go-ethereum/consensus/misc/dao.go

@@ -0,0 +1,86 @@
+// Copyright 2016 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 (
+	"bytes"
+	"errors"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+var (
+	// ErrBadProDAOExtra is returned if a header doesn't support the DAO fork on a
+	// pro-fork client.
+	ErrBadProDAOExtra = errors.New("bad DAO pro-fork extra-data")
+
+	// ErrBadNoDAOExtra is returned if a header does support the DAO fork on a no-
+	// fork client.
+	ErrBadNoDAOExtra = errors.New("bad DAO no-fork extra-data")
+)
+
+// VerifyDAOHeaderExtraData validates the extra-data field of a block header to
+// ensure it conforms to DAO hard-fork rules.
+//
+// DAO hard-fork extension to the header validity:
+//
+//   - if the node is no-fork, do not accept blocks in the [fork, fork+10) range
+//     with the fork specific extra-data set.
+//   - if the node is pro-fork, require blocks in the specific range to have the
+//     unique extra-data set.
+func VerifyDAOHeaderExtraData(config *params.ChainConfig, header *types.Header) error {
+	// Short circuit validation if the node doesn't care about the DAO fork
+	if config.DAOForkBlock == nil {
+		return nil
+	}
+	// Make sure the block is within the fork's modified extra-data range
+	limit := new(big.Int).Add(config.DAOForkBlock, params.DAOForkExtraRange)
+	if header.Number.Cmp(config.DAOForkBlock) < 0 || header.Number.Cmp(limit) >= 0 {
+		return nil
+	}
+	// Depending on whether we support or oppose the fork, validate the extra-data contents
+	if config.DAOForkSupport {
+		if !bytes.Equal(header.Extra, params.DAOForkBlockExtra) {
+			return ErrBadProDAOExtra
+		}
+	} else {
+		if bytes.Equal(header.Extra, params.DAOForkBlockExtra) {
+			return ErrBadNoDAOExtra
+		}
+	}
+	// All ok, header has the same extra-data we expect
+	return nil
+}
+
+// ApplyDAOHardFork modifies the state database according to the DAO hard-fork
+// rules, transferring all balances of a set of DAO accounts to a single refund
+// contract.
+func ApplyDAOHardFork(statedb *state.StateDB) {
+	// Retrieve the contract to refund balances into
+	if !statedb.Exist(params.DAORefundContract) {
+		statedb.CreateAccount(params.DAORefundContract)
+	}
+
+	// Move every DAO account and extra-balance account funds into the refund contract
+	for _, addr := range params.DAODrainList() {
+		statedb.AddBalance(params.DAORefundContract, statedb.GetBalance(addr))
+		statedb.SetBalance(addr, new(big.Int))
+	}
+}

vendor/github.com/ethereum/go-ethereum/consensus/misc/eip1559.go

@@ -0,0 +1,93 @@
+// 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 (
+	"fmt"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/math"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+// VerifyEip1559Header verifies some header attributes which were changed in EIP-1559,
+// - gas limit check
+// - basefee check
+func VerifyEip1559Header(config *params.ChainConfig, parent, header *types.Header) error {
+	// Verify that the gas limit remains within allowed bounds
+	parentGasLimit := parent.GasLimit
+	if !config.IsLondon(parent.Number) {
+		parentGasLimit = parent.GasLimit * params.ElasticityMultiplier
+	}
+	if err := VerifyGaslimit(parentGasLimit, header.GasLimit); err != nil {
+		return err
+	}
+	// Verify the header is not malformed
+	if header.BaseFee == nil {
+		return fmt.Errorf("header is missing baseFee")
+	}
+	// Verify the baseFee is correct based on the parent header.
+	expectedBaseFee := CalcBaseFee(config, parent)
+	if header.BaseFee.Cmp(expectedBaseFee) != 0 {
+		return fmt.Errorf("invalid baseFee: have %s, want %s, parentBaseFee %s, parentGasUsed %d",
+			header.BaseFee, expectedBaseFee, parent.BaseFee, parent.GasUsed)
+	}
+	return nil
+}
+
+// CalcBaseFee calculates the basefee of the header.
+func CalcBaseFee(config *params.ChainConfig, parent *types.Header) *big.Int {
+	// If the current block is the first EIP-1559 block, return the InitialBaseFee.
+	if !config.IsLondon(parent.Number) {
+		return new(big.Int).SetUint64(params.InitialBaseFee)
+	}
+
+	parentGasTarget := parent.GasLimit / params.ElasticityMultiplier
+	// If the parent gasUsed is the same as the target, the baseFee remains unchanged.
+	if parent.GasUsed == parentGasTarget {
+		return new(big.Int).Set(parent.BaseFee)
+	}
+
+	var (
+		num   = new(big.Int)
+		denom = new(big.Int)
+	)
+
+	if parent.GasUsed > parentGasTarget {
+		// If the parent block used more gas than its target, the baseFee should increase.
+		// max(1, parentBaseFee * gasUsedDelta / parentGasTarget / baseFeeChangeDenominator)
+		num.SetUint64(parent.GasUsed - parentGasTarget)
+		num.Mul(num, parent.BaseFee)
+		num.Div(num, denom.SetUint64(parentGasTarget))
+		num.Div(num, denom.SetUint64(params.BaseFeeChangeDenominator))
+		baseFeeDelta := math.BigMax(num, common.Big1)
+
+		return num.Add(parent.BaseFee, baseFeeDelta)
+	} else {
+		// Otherwise if the parent block used less gas than its target, the baseFee should decrease.
+		// max(0, parentBaseFee * gasUsedDelta / parentGasTarget / baseFeeChangeDenominator)
+		num.SetUint64(parentGasTarget - parent.GasUsed)
+		num.Mul(num, parent.BaseFee)
+		num.Div(num, denom.SetUint64(parentGasTarget))
+		num.Div(num, denom.SetUint64(params.BaseFeeChangeDenominator))
+		baseFee := num.Sub(parent.BaseFee, num)
+
+		return math.BigMax(baseFee, common.Big0)
+	}
+}

vendor/github.com/ethereum/go-ethereum/consensus/misc/forks.go

@@ -0,0 +1,43 @@
+// Copyright 2017 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 (
+	"fmt"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+// VerifyForkHashes verifies that blocks conforming to network hard-forks do have
+// the correct hashes, to avoid clients going off on different chains. This is an
+// optional feature.
+func VerifyForkHashes(config *params.ChainConfig, header *types.Header, uncle bool) error {
+	// We don't care about uncles
+	if uncle {
+		return nil
+	}
+	// If the homestead reprice hash is set, validate it
+	if config.EIP150Block != nil && config.EIP150Block.Cmp(header.Number) == 0 {
+		if config.EIP150Hash != (common.Hash{}) && config.EIP150Hash != header.Hash() {
+			return fmt.Errorf("homestead gas reprice fork: have %#x, want %#x", header.Hash(), config.EIP150Hash)
+		}
+	}
+	// All ok, return
+	return nil
+}

vendor/github.com/ethereum/go-ethereum/consensus/misc/gaslimit.go

@@ -0,0 +1,42 @@
+// 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 (
+	"errors"
+	"fmt"
+
+	"github.com/ethereum/go-ethereum/params"
+)
+
+// VerifyGaslimit verifies the header gas limit according increase/decrease
+// in relation to the parent gas limit.
+func VerifyGaslimit(parentGasLimit, headerGasLimit uint64) error {
+	// Verify that the gas limit remains within allowed bounds
+	diff := int64(parentGasLimit) - int64(headerGasLimit)
+	if diff < 0 {
+		diff *= -1
+	}
+	limit := parentGasLimit / params.GasLimitBoundDivisor
+	if uint64(diff) >= limit {
+		return fmt.Errorf("invalid gas limit: have %d, want %d +-= %d", headerGasLimit, parentGasLimit, limit-1)
+	}
+	if headerGasLimit < params.MinGasLimit {
+		return errors.New("invalid gas limit below 5000")
+	}
+	return nil
+}