Documentation
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Overview ¶
Package crypto provides cryptographic operations for Ethereum transactions. It implements ECDSA signing, Keccak-256 hashing, and key management using the secp256k1 elliptic curve. This package supports RFC 6979 deterministic signatures and Ethereum transaction signing.
Package crypto provides cryptographic operations for Ethereum transactions.
Index ¶
- func BytesFromECDSAPrivateKey(privateKey *ecdsa.PrivateKey) []byte
- func ECDSAKeysFromPrivateKeyBytes(pk []byte) (*ecdsa.PrivateKey, *ecdsa.PublicKey)
- func ECDSAKeysFromPrivateKeyHex(pk string) (priv *ecdsa.PrivateKey, pub *ecdsa.PublicKey, err error)
- func ECDSAPublicKeyCompressedToBytes(pub *ecdsa.PublicKey) []byte
- func ECDSAPublicKeyToBytes(pub *ecdsa.PublicKey) []byte
- func Keccak256(data ...[]byte) []byte
- func PubKeyToAddressBytes(p ecdsa.PublicKey) []byte
- func SignEcdsaRfc6979(priv *ecdsa.PrivateKey, hash []byte, alg func() hash.Hash) (v byte, r, s *big.Int)
- func SignEcdsaRfc6979Bytes(privateKey *ecdsa.PrivateKey, hash []byte, alg func() hash.Hash) (sig []byte)
- type EthTxSigner
- type KeccakState
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func BytesFromECDSAPrivateKey ¶
func BytesFromECDSAPrivateKey(privateKey *ecdsa.PrivateKey) []byte
BytesFromECDSAPrivateKey extracts the raw bytes from an ECDSA private key. Returns the private key D value padded to the curve's bit size.
func ECDSAKeysFromPrivateKeyBytes ¶
func ECDSAKeysFromPrivateKeyBytes(pk []byte) (*ecdsa.PrivateKey, *ecdsa.PublicKey)
ECDSAKeysFromPrivateKeyBytes derives ECDSA key pair from raw private key bytes. Uses the secp256k1 curve for key derivation.
func ECDSAKeysFromPrivateKeyHex ¶
func ECDSAKeysFromPrivateKeyHex(pk string) (priv *ecdsa.PrivateKey, pub *ecdsa.PublicKey, err error)
ECDSAKeysFromPrivateKeyHex derives ECDSA key pair from a hex-encoded private key.
func ECDSAPublicKeyCompressedToBytes ¶
ECDSAPublicKeyCompressedToBytes serializes an ECDSA public key to compressed format. Returns 33 bytes: 0x02 or 0x03 prefix + 32-byte X coordinate.
func ECDSAPublicKeyToBytes ¶
ECDSAPublicKeyToBytes serializes an ECDSA public key to uncompressed format. Returns 65 bytes: 0x04 prefix + 32-byte X + 32-byte Y coordinates.
func Keccak256 ¶
Keccak256 calculates and returns the Keccak256 hash of the input data or few pieces of data.
func PubKeyToAddressBytes ¶
PubKeyToAddressBytes derives an Ethereum address from an ECDSA public key. Returns the last 20 bytes of the Keccak-256 hash of the public key.
func SignEcdsaRfc6979 ¶
func SignEcdsaRfc6979Bytes ¶
func SignEcdsaRfc6979Bytes(privateKey *ecdsa.PrivateKey, hash []byte, alg func() hash.Hash) (sig []byte)
SignEcdsaRfc6979Bytes signs using RFC 6979 and returns 65-byte signature [R || S || V].
Types ¶
type EthTxSigner ¶
type EthTxSigner struct {
Nonce uint64 // nonce of sender account
GasPrice *big.Int // wei per gas
Gas uint64 // gas limit
To *[]byte `rlp:"nil"` // nil means contract creation
Value *big.Int // wei amount
Data []byte // contract invocation input data
V, R, S *big.Int // signature values
// contains filtered or unexported fields
}
EthTxSigner represents an Ethereum transaction with signing capabilities. Supports EIP-155 chain ID for replay protection.
func NewEthTxSigner ¶
func NewEthTxSigner(nonce uint64, gasPrice *big.Int, gas uint64, To []byte, value *big.Int, data []byte) *EthTxSigner
NewEthTxSigner creates a new Ethereum transaction signer with the given parameters.
func (*EthTxSigner) EncodeRPL ¶
func (tx *EthTxSigner) EncodeRPL() (data []byte, err error)
EncodeRPL encodes the signed transaction in RLP format for broadcasting.
func (*EthTxSigner) Hash ¶
func (tx *EthTxSigner) Hash() []byte
Hash computes the EIP-155 transaction hash for signing. Includes chain ID in the hash to prevent replay attacks.
func (*EthTxSigner) SetChainId ¶
func (tx *EthTxSigner) SetChainId(id *big.Int)
SetChainId sets the EIP-155 chain ID for replay protection.
func (*EthTxSigner) Sign ¶
func (tx *EthTxSigner) Sign(privateKey *ecdsa.PrivateKey) (sig []byte)
Sign creates an ECDSA signature for the transaction using RFC 6979. Returns 65-byte signature in [R || S || V] format and populates V, R, S fields.
type KeccakState ¶
KeccakState wraps sha3.state. In addition to the usual hash methods, it also supports Read to get a variable amount of data from the hash state. Read is faster than Sum because it doesn't copy the internal state, but also modifies the internal state. imported from go-ethereum, modified to remove dependency on go-ethereum/common because "A little copying is better than a little dependency." (https://go-proverbs.github.io) ;)
func NewKeccakState ¶
func NewKeccakState() KeccakState
NewKeccakState creates a new Keccak-256 hash state.
Source Files
Directories