Struct LedgerSigner 

pub struct LedgerSigner<T = Ledger> { /* private fields */ }

Ledger app wrapper that implements the Signer trait.

Implementations

impl LedgerSigner

pub async fn new( derivation_path: DerivationPath, ) -> Result<LedgerSigner, LedgerError>

Initializes the Starknet Ledger app. Attempts to find and connect to a Ledger device. The device must be unlocked and have the Starknet app open.

The derivation_path passed in must follow EIP-2645, i.e. having 2645' as its “purpose” level as per BIP-44, as the Ledger app does not allow other paths to be used.

The path must also be 6-level in length. An example path for Starknet would be:

m/2645'/1195502025'/1470455285'/0'/0'/0

where:

• 2645' is the EIP-2645 prefix
• 1195502025', decimal for 0x4741e9c9, is the 31 lowest bits for sha256(starknet)
• 1470455285', decimal for 0x57a55df5, is the 31 lowest bits for sha256(starkli)

Currently, the Ledger app only enforces the length and the first level of the path.

impl<T> LedgerSigner<T>

pub fn new_with_app( derivation_path: DerivationPath, app: LedgerStarknetApp<T>, ) -> Result<LedgerSigner<T>, LedgerError>

Creates a Starknet Ledger signer with an already initialized Ledger app.

The derivation_path passed in must follow EIP-2645, i.e. having 2645' as its “purpose” level as per BIP-44, as the Ledger app does not allow other paths to be used.

The path must also be 6-level in length. An example path for Starknet would be:

m/2645'/1195502025'/1470455285'/0'/0'/0

where:

• 2645' is the EIP-2645 prefix
• 1195502025', decimal for 0x4741e9c9, is the 31 lowest bits for sha256(starknet)
• 1470455285', decimal for 0x57a55df5, is the 31 lowest bits for sha256(starkli)

Currently, the Ledger app only enforces the length and the first level of the path.

Trait Implementations

impl<T> Debug for LedgerSigner<T>

where T: Debug,

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

Formats the value using the given formatter.

impl<T> Signer for LedgerSigner<T>

where T: LedgerAsync + Sync,

type GetPublicKeyError = LedgerError

Possible errors for calling get_public_key.

type SignError = LedgerError

Possible errors for calling sign.

fn get_public_key<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<VerifyingKey, <LedgerSigner<T> as Signer>::GetPublicKeyError>> + Send + 'async_trait>>

where 'life0: 'async_trait, LedgerSigner<T>: 'async_trait,

Retrieves the verifying (public) key from the signer.

fn sign_hash<'life0, 'life1, 'async_trait>( &'life0 self, hash: &'life1 Felt, ) -> Pin<Box<dyn Future<Output = Result<Signature, <LedgerSigner<T> as Signer>::SignError>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, LedgerSigner<T>: 'async_trait,

Requests an ECDSA signature for a message hash.

fn is_interactive(&self, _context: SignerInteractivityContext<'_>) -> bool

Whether the underlying signer implementation is interactive, such as a hardware wallet. Implementations should return true if the signing operation is very expensive, even if not strictly “interactive” as in requiring human input.