75 lines
1.9 KiB
Go
75 lines
1.9 KiB
Go
package tests
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import (
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"fmt"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/cosmos/cosmos-sdk/crypto/keyring"
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cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cerc-io/laconicd/crypto/ethsecp256k1"
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)
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// NewAddrKey generates an Ethereum address and its corresponding private key.
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func NewAddrKey() (common.Address, cryptotypes.PrivKey) {
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privkey, _ := ethsecp256k1.GenerateKey()
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key, err := privkey.ToECDSA()
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if err != nil {
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return common.Address{}, nil
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}
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addr := crypto.PubkeyToAddress(key.PublicKey)
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return addr, privkey
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}
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// GenerateAddress generates an Ethereum address.
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func GenerateAddress() common.Address {
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addr, _ := NewAddrKey()
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return addr
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}
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var _ keyring.Signer = &Signer{}
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// Signer defines a type that is used on testing for signing MsgEthereumTx
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type Signer struct {
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privKey cryptotypes.PrivKey
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}
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func NewSigner(sk cryptotypes.PrivKey) keyring.Signer {
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return &Signer{
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privKey: sk,
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}
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}
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// Sign signs the message using the underlying private key
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func (s Signer) Sign(_ string, msg []byte) ([]byte, cryptotypes.PubKey, error) {
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if s.privKey.Type() != ethsecp256k1.KeyType {
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return nil, nil, fmt.Errorf(
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"invalid private key type for signing ethereum tx; expected %s, got %s",
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ethsecp256k1.KeyType,
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s.privKey.Type(),
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)
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}
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sig, err := s.privKey.Sign(msg)
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if err != nil {
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return nil, nil, err
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}
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return sig, s.privKey.PubKey(), nil
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}
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// SignByAddress sign byte messages with a user key providing the address.
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func (s Signer) SignByAddress(address sdk.Address, msg []byte) ([]byte, cryptotypes.PubKey, error) {
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signer := sdk.AccAddress(s.privKey.PubKey().Address())
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if !signer.Equals(address) {
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return nil, nil, fmt.Errorf("address mismatch: signer %s ≠ given address %s", signer, address)
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}
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return s.Sign("", msg)
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}
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