cmd/puppeth: etherchain light block explorer for PoW nets

1 files changed, 208 insertions, 0 deletions

diff --git a/cmd/puppeth/genesis.go b/cmd/puppeth/genesis.go
new file mode 100644
index 000000000..2b66df43c
--- /dev/null
+++ b/cmd/puppeth/genesis.go
@@ -0,0 +1,208 @@
+// Copyright 2017 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// go-ethereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// go-ethereum 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"encoding/binary"
+	"errors"
+	"math"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/consensus/ethash"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/params"
+)
+
+// parityChainSpec is the chain specification format used by Parity.
+type parityChainSpec struct {
+	Name   string `json:"name"`
+	Engine struct {
+		Ethash struct {
+			Params struct {
+				MinimumDifficulty      *hexutil.Big `json:"minimumDifficulty"`
+				DifficultyBoundDivisor *hexutil.Big `json:"difficultyBoundDivisor"`
+				GasLimitBoundDivisor   *hexutil.Big `json:"gasLimitBoundDivisor"`
+				DurationLimit          *hexutil.Big `json:"durationLimit"`
+				BlockReward            *hexutil.Big `json:"blockReward"`
+				HomesteadTransition    uint64       `json:"homesteadTransition"`
+				EIP150Transition       uint64       `json:"eip150Transition"`
+				EIP160Transition       uint64       `json:"eip160Transition"`
+				EIP161abcTransition    uint64       `json:"eip161abcTransition"`
+				EIP161dTransition      uint64       `json:"eip161dTransition"`
+				EIP649Reward           *hexutil.Big `json:"eip649Reward"`
+				EIP100bTransition      uint64       `json:"eip100bTransition"`
+				EIP649Transition       uint64       `json:"eip649Transition"`
+			} `json:"params"`
+		} `json:"Ethash"`
+	} `json:"engine"`
+
+	Params struct {
+		MaximumExtraDataSize hexutil.Uint64 `json:"maximumExtraDataSize"`
+		MinGasLimit          *hexutil.Big   `json:"minGasLimit"`
+		NetworkID            hexutil.Uint64 `json:"networkID"`
+		MaxCodeSize          uint64         `json:"maxCodeSize"`
+		EIP155Transition     uint64         `json:"eip155Transition"`
+		EIP98Transition      uint64         `json:"eip98Transition"`
+		EIP86Transition      uint64         `json:"eip86Transition"`
+		EIP140Transition     uint64         `json:"eip140Transition"`
+		EIP211Transition     uint64         `json:"eip211Transition"`
+		EIP214Transition     uint64         `json:"eip214Transition"`
+		EIP658Transition     uint64         `json:"eip658Transition"`
+	} `json:"params"`
+
+	Genesis struct {
+		Seal struct {
+			Ethereum struct {
+				Nonce   hexutil.Bytes `json:"nonce"`
+				MixHash hexutil.Bytes `json:"mixHash"`
+			} `json:"ethereum"`
+		} `json:"seal"`
+
+		Difficulty *hexutil.Big   `json:"difficulty"`
+		Author     common.Address `json:"author"`
+		Timestamp  hexutil.Uint64 `json:"timestamp"`
+		ParentHash common.Hash    `json:"parentHash"`
+		ExtraData  hexutil.Bytes  `json:"extraData"`
+		GasLimit   hexutil.Uint64 `json:"gasLimit"`
+	} `json:"genesis"`
+
+	Nodes    []string                                   `json:"nodes"`
+	Accounts map[common.Address]*parityChainSpecAccount `json:"accounts"`
+}
+
+// parityChainSpecAccount is the prefunded genesis account and/or precompiled
+// contract definition.
+type parityChainSpecAccount struct {
+	Balance *hexutil.Big            `json:"balance"`
+	Nonce   uint64                  `json:"nonce,omitempty"`
+	Builtin *parityChainSpecBuiltin `json:"builtin,omitempty"`
+}
+
+// parityChainSpecBuiltin is the precompiled contract definition.
+type parityChainSpecBuiltin struct {
+	Name       string                  `json:"name,omitempty"`
+	ActivateAt uint64                  `json:"activate_at,omitempty"`
+	Pricing    *parityChainSpecPricing `json:"pricing,omitempty"`
+}
+
+// parityChainSpecPricing represents the different pricing models that builtin
+// contracts might advertise using.
+type parityChainSpecPricing struct {
+	Linear       *parityChainSpecLinearPricing       `json:"linear,omitempty"`
+	ModExp       *parityChainSpecModExpPricing       `json:"modexp,omitempty"`
+	AltBnPairing *parityChainSpecAltBnPairingPricing `json:"alt_bn128_pairing,omitempty"`
+}
+
+type parityChainSpecLinearPricing struct {
+	Base uint64 `json:"base"`
+	Word uint64 `json:"word"`
+}
+
+type parityChainSpecModExpPricing struct {
+	Divisor uint64 `json:"divisor"`
+}
+
+type parityChainSpecAltBnPairingPricing struct {
+	Base uint64 `json:"base"`
+	Pair uint64 `json:"pair"`
+}
+
+// newParityChainSpec converts a go-ethereum genesis block into a Parity specific
+// chain specification format.
+func newParityChainSpec(network string, genesis *core.Genesis, bootnodes []string) (*parityChainSpec, error) {
+	// Only ethash is currently supported between go-ethereum and Parity
+	if genesis.Config.Ethash == nil {
+		return nil, errors.New("unsupported consensus engine")
+	}
+	// Reconstruct the chain spec in Parity's format
+	spec := &parityChainSpec{
+		Name:  network,
+		Nodes: bootnodes,
+	}
+	spec.Engine.Ethash.Params.MinimumDifficulty = (*hexutil.Big)(params.MinimumDifficulty)
+	spec.Engine.Ethash.Params.DifficultyBoundDivisor = (*hexutil.Big)(params.DifficultyBoundDivisor)
+	spec.Engine.Ethash.Params.GasLimitBoundDivisor = (*hexutil.Big)(params.GasLimitBoundDivisor)
+	spec.Engine.Ethash.Params.DurationLimit = (*hexutil.Big)(params.DurationLimit)
+	spec.Engine.Ethash.Params.BlockReward = (*hexutil.Big)(ethash.FrontierBlockReward)
+	spec.Engine.Ethash.Params.HomesteadTransition = genesis.Config.HomesteadBlock.Uint64()
+	spec.Engine.Ethash.Params.EIP150Transition = genesis.Config.EIP150Block.Uint64()
+	spec.Engine.Ethash.Params.EIP160Transition = genesis.Config.EIP155Block.Uint64()
+	spec.Engine.Ethash.Params.EIP161abcTransition = genesis.Config.EIP158Block.Uint64()
+	spec.Engine.Ethash.Params.EIP161dTransition = genesis.Config.EIP158Block.Uint64()
+	spec.Engine.Ethash.Params.EIP649Reward = (*hexutil.Big)(ethash.ByzantiumBlockReward)
+	spec.Engine.Ethash.Params.EIP100bTransition = genesis.Config.ByzantiumBlock.Uint64()
+	spec.Engine.Ethash.Params.EIP649Transition = genesis.Config.ByzantiumBlock.Uint64()
+
+	spec.Params.MaximumExtraDataSize = (hexutil.Uint64)(params.MaximumExtraDataSize)
+	spec.Params.MinGasLimit = (*hexutil.Big)(params.MinGasLimit)
+	spec.Params.NetworkID = (hexutil.Uint64)(genesis.Config.ChainId.Uint64())
+	spec.Params.MaxCodeSize = params.MaxCodeSize
+	spec.Params.EIP155Transition = genesis.Config.EIP155Block.Uint64()
+	spec.Params.EIP98Transition = math.MaxUint64
+	spec.Params.EIP86Transition = math.MaxUint64
+	spec.Params.EIP140Transition = genesis.Config.ByzantiumBlock.Uint64()
+	spec.Params.EIP211Transition = genesis.Config.ByzantiumBlock.Uint64()
+	spec.Params.EIP214Transition = genesis.Config.ByzantiumBlock.Uint64()
+	spec.Params.EIP658Transition = genesis.Config.ByzantiumBlock.Uint64()
+
+	spec.Genesis.Seal.Ethereum.Nonce = (hexutil.Bytes)(make([]byte, 8))
+	binary.LittleEndian.PutUint64(spec.Genesis.Seal.Ethereum.Nonce[:], genesis.Nonce)
+
+	spec.Genesis.Seal.Ethereum.MixHash = (hexutil.Bytes)(genesis.Mixhash[:])
+	spec.Genesis.Difficulty = (*hexutil.Big)(genesis.Difficulty)
+	spec.Genesis.Author = genesis.Coinbase
+	spec.Genesis.Timestamp = (hexutil.Uint64)(genesis.Timestamp)
+	spec.Genesis.ParentHash = genesis.ParentHash
+	spec.Genesis.ExtraData = (hexutil.Bytes)(genesis.ExtraData)
+	spec.Genesis.GasLimit = (hexutil.Uint64)(genesis.GasLimit)
+
+	spec.Accounts = make(map[common.Address]*parityChainSpecAccount)
+	for address, account := range genesis.Alloc {
+		spec.Accounts[address] = &parityChainSpecAccount{
+			Balance: (*hexutil.Big)(account.Balance),
+			Nonce:   account.Nonce,
+		}
+	}
+	spec.Accounts[common.BytesToAddress([]byte{1})].Builtin = &parityChainSpecBuiltin{
+		Name: "ecrecover", Pricing: &parityChainSpecPricing{Linear: &parityChainSpecLinearPricing{Base: 3000}},
+	}
+	spec.Accounts[common.BytesToAddress([]byte{2})].Builtin = &parityChainSpecBuiltin{
+		Name: "sha256", Pricing: &parityChainSpecPricing{Linear: &parityChainSpecLinearPricing{Base: 60, Word: 12}},
+	}
+	spec.Accounts[common.BytesToAddress([]byte{3})].Builtin = &parityChainSpecBuiltin{
+		Name: "ripemd160", Pricing: &parityChainSpecPricing{Linear: &parityChainSpecLinearPricing{Base: 600, Word: 120}},
+	}
+	spec.Accounts[common.BytesToAddress([]byte{4})].Builtin = &parityChainSpecBuiltin{
+		Name: "identity", Pricing: &parityChainSpecPricing{Linear: &parityChainSpecLinearPricing{Base: 15, Word: 3}},
+	}
+	if genesis.Config.ByzantiumBlock != nil {
+		spec.Accounts[common.BytesToAddress([]byte{5})].Builtin = &parityChainSpecBuiltin{
+			Name: "modexp", ActivateAt: genesis.Config.ByzantiumBlock.Uint64(), Pricing: &parityChainSpecPricing{ModExp: &parityChainSpecModExpPricing{Divisor: 20}},
+		}
+		spec.Accounts[common.BytesToAddress([]byte{6})].Builtin = &parityChainSpecBuiltin{
+			Name: "alt_bn128_add", ActivateAt: genesis.Config.ByzantiumBlock.Uint64(), Pricing: &parityChainSpecPricing{Linear: &parityChainSpecLinearPricing{Base: 500}},
+		}
+		spec.Accounts[common.BytesToAddress([]byte{7})].Builtin = &parityChainSpecBuiltin{
+			Name: "alt_bn128_mul", ActivateAt: genesis.Config.ByzantiumBlock.Uint64(), Pricing: &parityChainSpecPricing{Linear: &parityChainSpecLinearPricing{Base: 40000}},
+		}
+		spec.Accounts[common.BytesToAddress([]byte{8})].Builtin = &parityChainSpecBuiltin{
+			Name: "alt_bn128_pairing", ActivateAt: genesis.Config.ByzantiumBlock.Uint64(), Pricing: &parityChainSpecPricing{AltBnPairing: &parityChainSpecAltBnPairingPricing{Base: 100000, Pair: 80000}},
+		}
+	}
+	return spec, nil
+}