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storage.go
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storage.go
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package types
import (
"bytes"
"encoding/json"
"fmt"
ethcmn "github.com/ethereum/go-ethereum/common"
sdkerrors "github.com/okex/exchain/libs/cosmos-sdk/types/errors"
)
// Storage represents the account Storage map as a slice of single key value
// State pairs. This is to prevent non determinism at genesis initialization or export.
type Storage []State
// Validate performs a basic validation of the Storage fields.
func (s Storage) Validate() error {
seenStorage := make(map[string]bool)
for i, state := range s {
if seenStorage[state.Key.String()] {
return sdkerrors.Wrapf(ErrInvalidState, "duplicate state key %d", i)
}
if err := state.Validate(); err != nil {
return err
}
seenStorage[state.Key.String()] = true
}
return nil
}
// String implements the stringer interface
func (s Storage) String() string {
var str string
for _, state := range s {
str += fmt.Sprintf("%s: %s\n", state.Key.String(), state.Value.String())
}
return str
}
// Copy returns a copy of storage.
func (s Storage) Copy() Storage {
cpy := make(Storage, len(s))
copy(cpy, s)
return cpy
}
// State represents a single Storage key value pair item.
type State struct {
Key ethcmn.Hash `json:"key"`
Value ethcmn.Hash `json:"value"`
}
// Validate performs a basic validation of the State fields.
func (s State) Validate() error {
if bytes.Equal(s.Key.Bytes(), ethcmn.Hash{}.Bytes()) {
return sdkerrors.Wrap(ErrInvalidState, "state key hash cannot be empty")
}
// NOTE: state value can be empty
return nil
}
// NewState creates a new State instance
func NewState(key, value ethcmn.Hash) State {
return State{
Key: key,
Value: value,
}
}
func (s State) MarshalJSON() ([]byte, error) {
formatState := &struct {
Key string `json:"key"`
Value string `json:"value"`
}{
Key: s.Key.Hex(),
Value: s.Value.Hex(),
}
return json.Marshal(formatState)
}
func (s *State) UnmarshalJSON(input []byte) error {
formatState := &struct {
Key string `json:"key"`
Value string `json:"value"`
}{}
if err := json.Unmarshal(input, &formatState); err != nil {
return err
}
s.Key = ethcmn.HexToHash(formatState.Key)
s.Value = ethcmn.HexToHash(formatState.Value)
return nil
}