laconicd-deprecated/types/account.go
Federico Kunze d6783707dc
types: unmarshal account from hex address (#504)
* types: unmarshal account from hex address:

* changelog
2020-09-08 12:58:19 -03:00

210 lines
5.7 KiB
Go

package types
import (
"bytes"
"encoding/json"
"fmt"
"gopkg.in/yaml.v2"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/cosmos/cosmos-sdk/x/auth"
"github.com/cosmos/cosmos-sdk/x/auth/exported"
authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
ethcmn "github.com/ethereum/go-ethereum/common"
ethcrypto "github.com/ethereum/go-ethereum/crypto"
)
var _ exported.Account = (*EthAccount)(nil)
var _ exported.GenesisAccount = (*EthAccount)(nil)
func init() {
authtypes.RegisterAccountTypeCodec(&EthAccount{}, EthAccountName)
}
// ----------------------------------------------------------------------------
// Main Ethermint account
// ----------------------------------------------------------------------------
// EthAccount implements the auth.Account interface and embeds an
// auth.BaseAccount type. It is compatible with the auth.AccountKeeper.
type EthAccount struct {
*authtypes.BaseAccount `json:"base_account" yaml:"base_account"`
CodeHash []byte `json:"code_hash" yaml:"code_hash"`
}
// ProtoAccount defines the prototype function for BaseAccount used for an
// AccountKeeper.
func ProtoAccount() exported.Account {
return &EthAccount{
BaseAccount: &auth.BaseAccount{},
CodeHash: ethcrypto.Keccak256(nil),
}
}
// EthAddress returns the account address ethereum format.
func (acc EthAccount) EthAddress() ethcmn.Address {
return ethcmn.BytesToAddress(acc.Address.Bytes())
}
// TODO: remove on SDK v0.40
// Balance returns the balance of an account.
func (acc EthAccount) Balance() sdk.Int {
return acc.GetCoins().AmountOf(AttoPhoton)
}
// SetBalance sets an account's balance of aphotons
func (acc *EthAccount) SetBalance(amt sdk.Int) {
coins := acc.GetCoins()
diff := amt.Sub(coins.AmountOf(AttoPhoton))
switch {
case diff.IsPositive():
// Increase coins to amount
coins = coins.Add(NewPhotonCoin(diff))
case diff.IsNegative():
// Decrease coins to amount
coins = coins.Sub(sdk.NewCoins(NewPhotonCoin(diff.Neg())))
default:
return
}
if err := acc.SetCoins(coins); err != nil {
panic(fmt.Errorf("could not set coins for address %s: %w", acc.EthAddress().String(), err))
}
}
type ethermintAccountPretty struct {
Address sdk.AccAddress `json:"address" yaml:"address"`
EthAddress string `json:"eth_address" yaml:"eth_address"`
Coins sdk.Coins `json:"coins" yaml:"coins"`
PubKey string `json:"public_key" yaml:"public_key"`
AccountNumber uint64 `json:"account_number" yaml:"account_number"`
Sequence uint64 `json:"sequence" yaml:"sequence"`
CodeHash string `json:"code_hash" yaml:"code_hash"`
}
// MarshalYAML returns the YAML representation of an account.
func (acc EthAccount) MarshalYAML() (interface{}, error) {
alias := ethermintAccountPretty{
Address: acc.Address,
EthAddress: acc.EthAddress().String(),
Coins: acc.Coins,
AccountNumber: acc.AccountNumber,
Sequence: acc.Sequence,
CodeHash: ethcmn.Bytes2Hex(acc.CodeHash),
}
var err error
if acc.PubKey != nil {
alias.PubKey, err = sdk.Bech32ifyPubKey(sdk.Bech32PubKeyTypeAccPub, acc.PubKey)
if err != nil {
return nil, err
}
}
bz, err := yaml.Marshal(alias)
if err != nil {
return nil, err
}
return string(bz), err
}
// MarshalJSON returns the JSON representation of an EthAccount.
func (acc EthAccount) MarshalJSON() ([]byte, error) {
var ethAddress = ""
if acc.BaseAccount != nil && acc.Address != nil {
ethAddress = acc.EthAddress().String()
}
alias := ethermintAccountPretty{
Address: acc.Address,
EthAddress: ethAddress,
Coins: acc.Coins,
AccountNumber: acc.AccountNumber,
Sequence: acc.Sequence,
CodeHash: ethcmn.Bytes2Hex(acc.CodeHash),
}
var err error
if acc.PubKey != nil {
alias.PubKey, err = sdk.Bech32ifyPubKey(sdk.Bech32PubKeyTypeAccPub, acc.PubKey)
if err != nil {
return nil, err
}
}
return json.Marshal(alias)
}
// UnmarshalJSON unmarshals raw JSON bytes into an EthAccount.
func (acc *EthAccount) UnmarshalJSON(bz []byte) error {
var (
alias ethermintAccountPretty
err error
)
if err := json.Unmarshal(bz, &alias); err != nil {
return err
}
switch {
case !alias.Address.Empty() && alias.EthAddress != "":
// Both addresses provided. Verify correctness
ethAddress := ethcmn.HexToAddress(alias.EthAddress)
ethAddressFromAccAddress := ethcmn.BytesToAddress(alias.Address.Bytes())
if !bytes.Equal(ethAddress.Bytes(), alias.Address.Bytes()) {
err = sdkerrors.Wrapf(
sdkerrors.ErrInvalidAddress,
"expected %s, got %s",
ethAddressFromAccAddress.String(), ethAddress.String(),
)
}
case !alias.Address.Empty() && alias.EthAddress == "":
// unmarshal sdk.AccAddress only. Do nothing here
case alias.Address.Empty() && alias.EthAddress != "":
// retrieve sdk.AccAddress from ethereum address
ethAddress := ethcmn.HexToAddress(alias.EthAddress)
alias.Address = sdk.AccAddress(ethAddress.Bytes())
case alias.Address.Empty() && alias.EthAddress == "":
err = sdkerrors.Wrapf(
sdkerrors.ErrInvalidAddress,
"account must contain address in Ethereum Hex or Cosmos Bech32 format",
)
}
if err != nil {
return err
}
acc.BaseAccount = &authtypes.BaseAccount{
Coins: alias.Coins,
Address: alias.Address,
AccountNumber: alias.AccountNumber,
Sequence: alias.Sequence,
}
acc.CodeHash = ethcmn.Hex2Bytes(alias.CodeHash)
if alias.PubKey != "" {
acc.BaseAccount.PubKey, err = sdk.GetPubKeyFromBech32(sdk.Bech32PubKeyTypeAccPub, alias.PubKey)
if err != nil {
return err
}
}
return nil
}
// String implements the fmt.Stringer interface
func (acc EthAccount) String() string {
out, _ := yaml.Marshal(acc)
return string(out)
}