laconicd/x/evm/types/genesis.go
Federico Kunze 90f39390bc
evm: fix non-determinism (#352)
* evm: fix non-determinism

* fixes

* typo

* fix tests

* use Storage slice

* more fixes

* lint

* merge development

* additional tests
2020-07-13 16:01:45 -04:00

85 lines
2.4 KiB
Go

package types
import (
"bytes"
"errors"
"fmt"
"math/big"
ethcmn "github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
)
type (
// GenesisState defines the evm module genesis state
GenesisState struct {
Accounts []GenesisAccount `json:"accounts"`
TxsLogs []TransactionLogs `json:"txs_logs"`
}
// GenesisAccount defines an account to be initialized in the genesis state.
// Its main difference between with Geth's GenesisAccount is that it uses a custom
// storage type and that it doesn't contain the private key field.
GenesisAccount struct {
Address ethcmn.Address `json:"address"`
Balance *big.Int `json:"balance"`
Code hexutil.Bytes `json:"code,omitempty"`
Storage Storage `json:"storage,omitempty"`
}
)
// Validate performs a basic validation of a GenesisAccount fields.
func (ga GenesisAccount) Validate() error {
if bytes.Equal(ga.Address.Bytes(), ethcmn.Address{}.Bytes()) {
return fmt.Errorf("address cannot be the zero address %s", ga.Address.String())
}
if ga.Balance == nil {
return errors.New("balance cannot be nil")
}
if ga.Balance.Sign() == -1 {
return errors.New("balance cannot be negative")
}
if ga.Code != nil && len(ga.Code) == 0 {
return errors.New("code bytes cannot be empty")
}
return ga.Storage.Validate()
}
// DefaultGenesisState sets default evm genesis state with empty accounts.
func DefaultGenesisState() GenesisState {
return GenesisState{
Accounts: []GenesisAccount{},
TxsLogs: []TransactionLogs{},
}
}
// Validate performs basic genesis state validation returning an error upon any
// failure.
func (gs GenesisState) Validate() error {
seenAccounts := make(map[string]bool)
seenTxs := make(map[string]bool)
for _, acc := range gs.Accounts {
if seenAccounts[acc.Address.String()] {
return fmt.Errorf("duplicated genesis account %s", acc.Address.String())
}
if err := acc.Validate(); err != nil {
return fmt.Errorf("invalid genesis account %s: %w", acc.Address.String(), err)
}
seenAccounts[acc.Address.String()] = true
}
for _, tx := range gs.TxsLogs {
if seenTxs[tx.Hash.String()] {
return fmt.Errorf("duplicated logs from transaction %s", tx.Hash.String())
}
if err := tx.Validate(); err != nil {
return fmt.Errorf("invalid logs from transaction %s: %w", tx.Hash.String(), err)
}
seenTxs[tx.Hash.String()] = true
}
return nil
}