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Merge pull request #329 from multiversx/feat/migration-app
Feat/migration app
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Original file line number | Diff line number | Diff line change |
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package ethereum | ||
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import ( | ||
"crypto/ecdsa" | ||
"math/big" | ||
"os" | ||
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"github.com/ethereum/go-ethereum/accounts/abi/bind" | ||
"github.com/ethereum/go-ethereum/common" | ||
ethCrypto "github.com/ethereum/go-ethereum/crypto" | ||
"github.com/multiversx/mx-bridge-eth-go/core/converters" | ||
) | ||
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type cryptoHandler struct { | ||
privateKey *ecdsa.PrivateKey | ||
publicKey *ecdsa.PublicKey | ||
address common.Address | ||
} | ||
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// NewCryptoHandler creates a new instance of type cryptoHandler able to sign messages and provide the containing public key | ||
func NewCryptoHandler(privateKeyFilename string) (*cryptoHandler, error) { | ||
privateKeyBytes, err := os.ReadFile(privateKeyFilename) | ||
if err != nil { | ||
return nil, err | ||
} | ||
privateKeyString := converters.TrimWhiteSpaceCharacters(string(privateKeyBytes)) | ||
privateKey, err := ethCrypto.HexToECDSA(privateKeyString) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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publicKey := privateKey.Public() | ||
publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey) | ||
if !ok { | ||
return nil, errPublicKeyCast | ||
} | ||
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return &cryptoHandler{ | ||
privateKey: privateKey, | ||
publicKey: publicKeyECDSA, | ||
address: ethCrypto.PubkeyToAddress(*publicKeyECDSA), | ||
}, nil | ||
} | ||
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// Sign signs the provided message hash with the containing private key | ||
func (handler *cryptoHandler) Sign(msgHash common.Hash) ([]byte, error) { | ||
return ethCrypto.Sign(msgHash.Bytes(), handler.privateKey) | ||
} | ||
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// GetAddress returns the corresponding address of the containing public key | ||
func (handler *cryptoHandler) GetAddress() common.Address { | ||
return handler.address | ||
} | ||
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// CreateKeyedTransactor creates a keyed transactor used to create transactions on Ethereum chain | ||
func (handler *cryptoHandler) CreateKeyedTransactor(chainId *big.Int) (*bind.TransactOpts, error) { | ||
return bind.NewKeyedTransactorWithChainID(handler.privateKey, chainId) | ||
} | ||
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// IsInterfaceNil returns true if there is no value under the interface | ||
func (handler *cryptoHandler) IsInterfaceNil() bool { | ||
return handler == nil | ||
} |
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