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account.go
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account.go
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package types
import (
"bytes"
"encoding/json"
"fmt"
"github.com/pkg/errors"
"strings"
"gopkg.in/yaml.v2"
codectypes "github.com/cosmos/cosmos-sdk/codec/types"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
ethcmn "github.com/ethereum/go-ethereum/common"
ethcrypto "github.com/ethereum/go-ethereum/crypto"
)
var (
_ authtypes.AccountI = (*EthAccount)(nil)
_ authtypes.GenesisAccount = (*EthAccount)(nil)
_ codectypes.UnpackInterfacesMessage = (*EthAccount)(nil)
)
// ----------------------------------------------------------------------------
// Main Ethermint account
// ----------------------------------------------------------------------------
// ProtoAccount defines the prototype function for BaseAccount used for an
// AccountKeeper.
func ProtoAccount() authtypes.AccountI {
return &EthAccount{
BaseAccount: &authtypes.BaseAccount{},
CodeHash: ethcrypto.Keccak256(nil),
}
}
// EthAddress returns the account address ethereum format.
func (acc EthAccount) EthAddress() ethcmn.Address {
return ethcmn.BytesToAddress(acc.GetAddress().Bytes())
}
type ethAccountPretty struct {
Address string `json:"address" yaml:"address"`
EthAddress string `json:"eth_address" yaml:"eth_address"`
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 := ethAccountPretty{
Address: acc.Address,
EthAddress: acc.EthAddress().String(),
AccountNumber: acc.AccountNumber,
Sequence: acc.Sequence,
CodeHash: ethcmn.Bytes2Hex(acc.CodeHash),
PubKey: "",
}
var err error
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 == "" {
ethAddress = acc.EthAddress().String()
}
alias := ethAccountPretty{
Address: acc.Address,
EthAddress: ethAddress,
AccountNumber: acc.AccountNumber,
Sequence: acc.Sequence,
CodeHash: ethcmn.Bytes2Hex(acc.CodeHash),
PubKey: "",
}
return json.Marshal(alias)
}
// UnmarshalJSON unmarshals raw JSON bytes into an EthAccount.
func (acc *EthAccount) UnmarshalJSON(bz []byte) error {
var (
alias ethAccountPretty
err error
)
if err := json.Unmarshal(bz, &alias); err != nil {
return err
}
switch {
case alias.Address != "" && alias.EthAddress != "":
// Both addresses provided. Verify correctness
ethAddress := ethcmn.HexToAddress(alias.EthAddress)
var address sdk.AccAddress
address, err = sdk.AccAddressFromBech32(alias.Address)
if err != nil {
return err
}
ethAddressFromAccAddress := ethcmn.BytesToAddress(address.Bytes())
if !bytes.Equal(ethAddress.Bytes(), address.Bytes()) {
err = sdkerrors.Wrapf(
sdkerrors.ErrInvalidAddress,
"expected %s, got %s",
ethAddressFromAccAddress.String(), ethAddress.String(),
)
}
case alias.Address != "" && alias.EthAddress == "":
// unmarshal sdk.AccAddress only. Do nothing here
case alias.Address == "" && alias.EthAddress != "":
// retrieve sdk.AccAddress from ethereum address
ethAddress := ethcmn.HexToAddress(alias.EthAddress)
alias.Address = sdk.AccAddress(ethAddress.Bytes()).String()
case alias.Address == "" && 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{
Address: alias.Address,
AccountNumber: alias.AccountNumber,
Sequence: alias.Sequence,
}
acc.CodeHash = ethcmn.HexToHash(alias.CodeHash).Bytes()
return nil
}
// String implements the fmt.Stringer interface
func (acc EthAccount) String() string {
out, _ := yaml.Marshal(acc)
return string(out)
}
func CosmosAddressToEthAddress(addr string) (ethcmn.Address, error) {
if strings.HasPrefix(addr, sdk.GetConfig().GetBech32AccountAddrPrefix()) {
// Check to see if address is Cosmos bech32 formatted
toAddr, err := sdk.AccAddressFromBech32(addr)
if err != nil {
return ethcmn.Address{}, errors.Wrap(err, "must provide a valid Bech32 address")
}
ethAddr := ethcmn.BytesToAddress(toAddr.Bytes())
return ethAddr, nil
}
if !strings.HasPrefix(addr, "0x") {
addr = "0x" + addr
}
valid := ethcmn.IsHexAddress(addr)
if !valid {
return ethcmn.Address{}, fmt.Errorf("%s is not a valid Ethereum or Cosmos address", addr)
}
ethAddr := ethcmn.HexToAddress(addr)
return ethAddr, nil
}