eth2deposit

package module
v1.0.10 Latest Latest
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 Go to latest Published: Sep 23, 2022 License: GPL-3.0 Imports: 19 Imported by: 0

README

GoDoc MIT licensed

eth2deposit

A Golang library for runtime ETH2 staking

Features

Installation

$ go get github.com/RockX-SG/eth2deposit

API is experimental and may have unstable changes. You should pin a version.

Status

Beta

Documentation

Overview

This package aims to enhance online staking service procedure with safe usage of master key to derive child keys 

package main

import (
	"crypto/rand"
	"fmt"
	"io"

	"github.com/RockX-SG/eth2deposit"
	"github.com/awnumar/memguard"
)

func main() {
	// Safely terminate in case of an interrupt signal
	memguard.CatchInterrupt()
	// Purge the session when we return
	defer memguard.Purge()

	var seed [32]byte
	io.ReadFull(rand.Reader, seed[:])

	// create master key and dervie 100th child key
	masterKey := eth2deposit.NewMasterKey(seed)
	lockedBuffer, err := masterKey.DeriveChild(100)
	if err != nil {
		panic(err)
	}

	// create a deposit credential
	cred, err := eth2deposit.NewCredential(lockedBuffer, 0, nil, eth2deposit.MainnetSetting)
	if err != nil {
		panic(err)
	}

	bts, err := cred.MarshalText()
	if err != nil {
		panic(err)
	}

	fmt.Println(string(bts))
}

Code generated by fastssz. DO NOT EDIT. Hash: 3e913cb74b7db9eb4049edc1b26de7a2274819ea5f34346389b2c3f2555658ed Version: 0.1.3-dev

Index

Constants

View Source 
const (
	K = 32
	L = K * 255
)
View Source 
const (
	MAINNET = "mainnet"
	PYRMONT = "pyrmont"
	PRATER  = "prater"
)
View Source 
const (
	SeedLength = 32
)

Variables

View Source 
var (
	R, _ = new(big.Int).SetString("52435875175126190479447740508185965837690552500527637822603658699938581184513", 10)
)

Functions

func ComputeDepositDomain added in v1.0.8 

func ComputeDepositDomain(fork_version [4]byte) ([]byte, error)

func ComputeDepositForkDataRoot added in v1.0.8 

func ComputeDepositForkDataRoot(current_version [4]byte) ([]byte, error)

func ComputeSigningRoot added in v1.0.8 

func ComputeSigningRoot(ssz_object ssz.HashRoot, domain []byte) ([]byte, error)

Types

type BaseChainSetting 

type BaseChainSetting struct {
	ETH2_NETWORK_NAME    string
	GENESIS_FORK_VERSION [4]byte
}
var (
	MainnetSetting BaseChainSetting
	PyrmontSetting BaseChainSetting
	PraterSetting  BaseChainSetting
)

type CompactDepositData 

type CompactDepositData struct {
	PubKey             string `json:"pubkey"`
	WithdrawCredential string `json:"withdrawal_credentials"`
	Amount             int    `json:"amount"`
	Signature          string `json:"signature"`
	DepositMessageRoot string `json:"deposit_message_root"`
	DepositDataRoot    string `json:"deposit_data_root"`
	ForkVersion        string `json:"fork_version"`
	Eth2NetworkName    string `json:"network_name"`
	DepositCliVersion  string `json:"deposit_cli_version"`
}

type Credential 

type Credential struct {
	// contains filtered or unexported fields
}

Credential defines a ETH2 bls signing credential

func NewCredential 

func NewCredential(buf *memguard.LockedBuffer, account uint32, hex_eth1_withdrawal_address []byte, chain BaseChainSetting) (*Credential, error)

NewCredential creates an ETH2 BLS signing credential

func (*Credential) DepositMessage 

func (cred *Credential) DepositMessage() (*DepositMessage, error)

DepositMessage retrieves deposit message

func (*Credential) MarshalText 

func (cred *Credential) MarshalText() ([]byte, error)

String returns json string compatible with eth2deposit

func (*Credential) SignedDeposit 

func (cred *Credential) SignedDeposit() (*DepositData, error)

SignedDeposit returns the deposit data

func (*Credential) SigningPK 

func (cred *Credential) SigningPK() (pub []byte, err error)

SigningPK returns public key of BLS signing account

func (*Credential) SigningSK 

func (cred *Credential) SigningSK() (*memguard.LockedBuffer, error)

SigningSK returns locked signing secret key in 10-based string

func (*Credential) WithdrawCredentials 

func (cred *Credential) WithdrawCredentials() ([]byte, error)

WithdrawCredentials returns credential bytes

func (*Credential) WithdrawalPK 

func (cred *Credential) WithdrawalPK() (pub []byte, err error)

WithdrawalPK returns public key of BLS withdrawal account

func (*Credential) WithdrawalSK 

func (cred *Credential) WithdrawalSK() (*memguard.LockedBuffer, error)

WithdrawalSK returns locked withdraw secret key in 10-based string

type DepositData 

type DepositData struct {
	Pubkey                [48]byte `json:"pubkey" ssz-size:"48"`
	WithdrawalCredentials [32]byte `json:"withdrawal_credentials" ssz-size:"32"`
	Amount                uint64   `json:"amount"`
	Signature             [96]byte `json:"signature" ssz-size:"96"`
	Root                  [32]byte `ssz:"-"`
}

func (*DepositData) GetTree added in v1.0.10 

func (d *DepositData) GetTree() (*ssz.Node, error)

GetTree ssz hashes the DepositData object

func (*DepositData) HashTreeRoot 

func (d *DepositData) HashTreeRoot() ([32]byte, error)

HashTreeRoot ssz hashes the DepositData object

func (*DepositData) HashTreeRootWith 

func (d *DepositData) HashTreeRootWith(hh ssz.HashWalker) (err error)

HashTreeRootWith ssz hashes the DepositData object with a hasher

func (*DepositData) MarshalSSZ 

func (d *DepositData) MarshalSSZ() ([]byte, error)

MarshalSSZ ssz marshals the DepositData object

func (*DepositData) MarshalSSZTo 

func (d *DepositData) MarshalSSZTo(buf []byte) (dst []byte, err error)

MarshalSSZTo ssz marshals the DepositData object to a target array

func (*DepositData) SizeSSZ 

func (d *DepositData) SizeSSZ() (size int)

SizeSSZ returns the ssz encoded size in bytes for the DepositData object

func (*DepositData) UnmarshalSSZ 

func (d *DepositData) UnmarshalSSZ(buf []byte) error

UnmarshalSSZ ssz unmarshals the DepositData object

type DepositMessage 

type DepositMessage struct {
	Pubkey                [48]byte `json:"pubkey" ssz-size:"48"`
	WithdrawalCredentials [32]byte `json:"withdrawal_credentials" ssz-size:"32"`
	Amount                uint64   `json:"amount"`
}

func (*DepositMessage) GetTree added in v1.0.10 

func (d *DepositMessage) GetTree() (*ssz.Node, error)

GetTree ssz hashes the DepositMessage object

func (*DepositMessage) HashTreeRoot 

func (d *DepositMessage) HashTreeRoot() ([32]byte, error)

HashTreeRoot ssz hashes the DepositMessage object

func (*DepositMessage) HashTreeRootWith 

func (d *DepositMessage) HashTreeRootWith(hh ssz.HashWalker) (err error)

HashTreeRootWith ssz hashes the DepositMessage object with a hasher

func (*DepositMessage) MarshalSSZ 

func (d *DepositMessage) MarshalSSZ() ([]byte, error)

MarshalSSZ ssz marshals the DepositMessage object

func (*DepositMessage) MarshalSSZTo 

func (d *DepositMessage) MarshalSSZTo(buf []byte) (dst []byte, err error)

MarshalSSZTo ssz marshals the DepositMessage object to a target array

func (*DepositMessage) SizeSSZ 

func (d *DepositMessage) SizeSSZ() (size int)

SizeSSZ returns the ssz encoded size in bytes for the DepositMessage object

func (*DepositMessage) UnmarshalSSZ 

func (d *DepositMessage) UnmarshalSSZ(buf []byte) error

UnmarshalSSZ ssz unmarshals the DepositMessage object

type ForkData 

type ForkData struct {
	CurrentVersion       [4]byte  `json:"current_version" ssz-size:"4"`
	GenesisValidatorRoot [32]byte `json:"genesis_validators_root" ssz-size:"32"`
}

func (*ForkData) GetTree added in v1.0.10 

func (f *ForkData) GetTree() (*ssz.Node, error)

GetTree ssz hashes the ForkData object

func (*ForkData) HashTreeRoot 

func (f *ForkData) HashTreeRoot() ([32]byte, error)

HashTreeRoot ssz hashes the ForkData object

func (*ForkData) HashTreeRootWith 

func (f *ForkData) HashTreeRootWith(hh ssz.HashWalker) (err error)

HashTreeRootWith ssz hashes the ForkData object with a hasher

func (*ForkData) MarshalSSZ 

func (f *ForkData) MarshalSSZ() ([]byte, error)

MarshalSSZ ssz marshals the ForkData object

func (*ForkData) MarshalSSZTo 

func (f *ForkData) MarshalSSZTo(buf []byte) (dst []byte, err error)

MarshalSSZTo ssz marshals the ForkData object to a target array

func (*ForkData) SizeSSZ 

func (f *ForkData) SizeSSZ() (size int)

SizeSSZ returns the ssz encoded size in bytes for the ForkData object

func (*ForkData) UnmarshalSSZ 

func (f *ForkData) UnmarshalSSZ(buf []byte) error

UnmarshalSSZ ssz unmarshals the ForkData object

type MasterKey 

type MasterKey struct {
	N *big.Int
	// contains filtered or unexported fields
}

MasterKey defines an enclaved master key for offering online service

func NewMasterKey 

func NewMasterKey(seed [SeedLength]byte) *MasterKey

NewMasterKey creates an encalved key

func (*MasterKey) DeriveChild 

func (mkey *MasterKey) DeriveChild(path string) (*memguard.LockedBuffer, error)

DeriveChild derives crypto-strong child key

Approach:

For Each Level of Subkey Generation: 

secret := hmac(rockx.com/eth/key_id/%v(string), parentKey)
pubkey := p256.ScalaBaseMult(secret)
childKey := hash(pubkey)

type SigningData 

type SigningData struct {
	ObjectRoot [32]byte `json:"current_version" ssz-size:"32"`
	Domain     [32]byte `json:"domain" ssz-size:"32"`
}

func (*SigningData) GetTree added in v1.0.10 

func (s *SigningData) GetTree() (*ssz.Node, error)

GetTree ssz hashes the SigningData object

func (*SigningData) HashTreeRoot 

func (s *SigningData) HashTreeRoot() ([32]byte, error)

HashTreeRoot ssz hashes the SigningData object

func (*SigningData) HashTreeRootWith 

func (s *SigningData) HashTreeRootWith(hh ssz.HashWalker) (err error)

HashTreeRootWith ssz hashes the SigningData object with a hasher

func (*SigningData) MarshalSSZ 

func (s *SigningData) MarshalSSZ() ([]byte, error)

MarshalSSZ ssz marshals the SigningData object

func (*SigningData) MarshalSSZTo 

func (s *SigningData) MarshalSSZTo(buf []byte) (dst []byte, err error)

MarshalSSZTo ssz marshals the SigningData object to a target array

func (*SigningData) SizeSSZ 

func (s *SigningData) SizeSSZ() (size int)

SizeSSZ returns the ssz encoded size in bytes for the SigningData object

func (*SigningData) UnmarshalSSZ 

func (s *SigningData) UnmarshalSSZ(buf []byte) error

UnmarshalSSZ ssz unmarshals the SigningData object

type WithdrawType 

type WithdrawType int

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