Struct Keypair 

pub struct Keypair { /* private fields */ }

An Ed25519 keypair for signing transactions.

This is a lightweight wrapper around ed25519_dalek::SigningKey that provides convenient methods for creating keypairs and signing messages.

Security Note

This stores the private key in memory. For production use with significant funds, consider using a hardware wallet or external signing service.

Implementations

impl Keypair

pub fn from_bytes(secret_key: [u8; 32]) -> Self

Create a keypair from a 32-byte secret key.

pub fn from_hex(hex: &str) -> SDKResult<Self>

Create a keypair from a hex-encoded secret key.

Accepts keys with or without “0x” prefix.

pub fn generate() -> Self

Generate a new random keypair.

Uses the OS random number generator.

pub fn sign(&self, message: &[u8]) -> Vec<u8>

Sign a message and return the 64-byte signature.

pub fn public_key(&self) -> Vec<u8>

Get the 32-byte public key.

pub fn address(&self) -> String

The on-chain address (base58-encoded public key).

This is the canonical address format used by the Bullet exchange. For the hex-encoded raw public key, see address_hex.

pub fn address_hex(&self) -> String

The public key as a hex string (32 bytes → 64 hex chars).

pub fn write_to_file(&self, path: impl AsRef<Path>) -> Result<()>

Write to a Solana-compatible JSON keystore file.

Format: a JSON array of 64 integers — the 32-byte secret key followed by the 32-byte public key. Compatible with solana-keygen and Phantom.

pub fn read_from_file(path: impl AsRef<Path>) -> Result<Self>

Read a Solana-compatible JSON keystore file.

Accepts either a 64-byte array (secret + public) or a 32-byte array (secret only). Returns an error if the file is missing or malformed.

Trait Implementations

impl Clone for Keypair

fn clone(&self) -> Keypair

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Keypair

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.