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genesis_alloc.go
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genesis_alloc.go
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package types
import (
"bytes"
"encoding/hex"
"encoding/json"
"fmt"
"github.com/truechain/truechain-engineering-code/common/math"
"github.com/pkg/errors"
"math/big"
"github.com/truechain/truechain-engineering-code/common"
"github.com/truechain/truechain-engineering-code/common/hexutil"
"github.com/truechain/truechain-engineering-code/rlp"
"strings"
)
// GenesisAlloc specifies the initial state that is part of the genesis block.
type GenesisAlloc map[common.Address]GenesisAccount
func (ga *GenesisAlloc) UnmarshalJSON(data []byte) error {
m := make(map[common.UnprefixedAddress]GenesisAccount)
if err := json.Unmarshal(data, &m); err != nil {
return err
}
*ga = make(GenesisAlloc)
for addr, a := range m {
(*ga)[common.Address(addr)] = a
}
return nil
}
// GenesisAccount is an account in the state of the genesis block.
type GenesisAccount struct {
Code []byte `json:"code,omitempty"`
Storage map[common.Hash]common.Hash `json:"storage,omitempty"`
Balance *big.Int `json:"balance" gencodec:"required"`
Nonce uint64 `json:"nonce,omitempty"`
PrivateKey []byte `json:"secretKey,omitempty"` // for tests
}
func (g GenesisAccount) MarshalJSON() ([]byte, error) {
type GenesisAccount struct {
Code hexutil.Bytes `json:"code,omitempty"`
Storage map[storageJSON]storageJSON `json:"storage,omitempty"`
Balance *math.HexOrDecimal256 `json:"balance" gencodec:"required"`
Nonce math.HexOrDecimal64 `json:"nonce,omitempty"`
PrivateKey hexutil.Bytes `json:"secretKey,omitempty"`
}
var enc GenesisAccount
enc.Code = g.Code
if g.Storage != nil {
enc.Storage = make(map[storageJSON]storageJSON, len(g.Storage))
for k, v := range g.Storage {
enc.Storage[storageJSON(k)] = storageJSON(v)
}
}
enc.Balance = (*math.HexOrDecimal256)(g.Balance)
enc.Nonce = math.HexOrDecimal64(g.Nonce)
enc.PrivateKey = g.PrivateKey
return json.Marshal(&enc)
}
func (g *GenesisAccount) UnmarshalJSON(input []byte) error {
type GenesisAccount struct {
Code *hexutil.Bytes `json:"code,omitempty"`
Storage map[storageJSON]storageJSON `json:"storage,omitempty"`
Balance *math.HexOrDecimal256 `json:"balance" gencodec:"required"`
Nonce *math.HexOrDecimal64 `json:"nonce,omitempty"`
PrivateKey *hexutil.Bytes `json:"secretKey,omitempty"`
}
var dec GenesisAccount
if err := json.Unmarshal(input, &dec); err != nil {
return err
}
if dec.Code != nil {
g.Code = *dec.Code
}
if dec.Storage != nil {
g.Storage = make(map[common.Hash]common.Hash, len(dec.Storage))
for k, v := range dec.Storage {
g.Storage[common.Hash(k)] = common.Hash(v)
}
}
if dec.Balance == nil {
return errors.New("missing required field 'balance' for GenesisAccount")
}
g.Balance = (*big.Int)(dec.Balance)
if dec.Nonce != nil {
g.Nonce = uint64(*dec.Nonce)
}
if dec.PrivateKey != nil {
g.PrivateKey = *dec.PrivateKey
}
return nil
}
// type genesisAccountMarshaling struct {
// Code hexutil.Bytes
// Balance *math.HexOrDecimal256
// Nonce math.HexOrDecimal64
// Storage map[storageJSON]storageJSON
// PrivateKey hexutil.Bytes
// }
// storageJSON represents a 256 bit byte array, but allows less than 256 bits when
// unmarshaling from hex.
type storageJSON common.Hash
func (h *storageJSON) UnmarshalText(text []byte) error {
text = bytes.TrimPrefix(text, []byte("0x"))
if len(text) > 64 {
return fmt.Errorf("too many hex characters in storage key/value %q", text)
}
offset := len(h) - len(text)/2 // pad on the left
if _, err := hex.Decode(h[offset:], text); err != nil {
fmt.Println(err)
return fmt.Errorf("invalid hex storage key/value %q", text)
}
return nil
}
func (h storageJSON) MarshalText() ([]byte, error) {
return hexutil.Bytes(h[:]).MarshalText()
}
func DecodePrealloc(data string) GenesisAlloc {
var p []struct{ Addr, Balance *big.Int }
if err := rlp.NewStream(strings.NewReader(data), 0).Decode(&p); err != nil {
panic(err)
}
ga := make(GenesisAlloc, len(p))
for _, account := range p {
ga[common.BigToAddress(account.Addr)] = GenesisAccount{Balance: account.Balance}
}
return ga
}
// GenesisMismatchError is raised when trying to overwrite an existing
// genesis block with an incompatible one.
type GenesisMismatchError struct {
Stored, New common.Hash
}
func (e *GenesisMismatchError) Error() string {
return fmt.Sprintf("database already contains an incompatible genesis block (have %x, new %x)", e.Stored[:8], e.New[:8])
}