web3dart/src/crypto/secp256k1 library

Classes

MsgSignature

Signatures used to sign Ethereum transactions and messages.

Properties

params → ECDomainParameters

final

Functions

compressPublicKey(Uint8List compressedPubKey) → Uint8List

Given a byte array computes its compressed version and returns it as a byte array, including the leading 02 or 03

decompressPublicKey(Uint8List compressedPubKey) → Uint8List

Given a byte array computes its expanded version and returns it as a byte array, including the leading 04

ecRecover(Uint8List messageHash, MsgSignature signatureData) → Uint8List

Given an arbitrary message hash and an Ethereum message signature encoded in bytes, returns the public key that was used to sign it. https://github.com/web3j/web3j/blob/c0b7b9c2769a466215d416696021aa75127c2ff1/crypto/src/main/java/org/web3j/crypto/Sign.java#L241

generateNewPrivateKey(Random random) → BigInt

Generates a new private key using the random instance provided. Please make sure you're using a cryptographically secure generator.

isValidSignature(Uint8List messageHash, MsgSignature signatureData, Uint8List publicKey) → bool

Given an arbitrary message hash, an Ethereum message signature encoded in bytes and a public key encoded in bytes, confirms whether that public key was used to sign the message or not.

privateKeyBytesToPublic(Uint8List privateKey) → Uint8List

Generates a public key for the given private key using the ecdsa curve which Ethereum uses.

privateKeyToPublic(BigInt privateKey) → Uint8List

Generates a public key for the given private key using the ecdsa curve which Ethereum uses.

publicKeyToAddress(Uint8List publicKey) → Uint8List

Constructs the Ethereum address associated with the given public key by taking the lower 160 bits of the key's sha3 hash.

sign(Uint8List messageHash, Uint8List privateKey) → MsgSignature

Signs the hashed data in messageHash using the given private key.