Struct Signer 

pub struct Signer { /* private fields */ }

HMAC signer for API authentication

Supports both base64-encoded and raw string secrets, with configurable output format.

Implementations

impl Signer

pub fn new(secret: &str) -> Result<Self, String>

Create a new signer from base64-encoded secret

Attempts to decode the secret using multiple base64 formats in order:

1. URL-safe without padding (most common for API keys)
2. URL-safe with padding
3. Standard base64
4. Falls back to raw bytes if all decoding attempts fail

pub fn from_raw(secret: &str) -> Self

Create a new signer from raw string secret (no base64 decoding)

pub fn sign( &self, message: &str, format: Base64Format, ) -> Result<String, String>

Sign a message with HMAC-SHA256

Arguments

• message - The message to sign
• format - The base64 encoding format for the output signature

pub fn create_message( timestamp: u64, method: &str, path: &str, body: Option<&str>, ) -> String

Create signature message for API request

Format: timestamp + method + path + body

Trait Implementations

impl Clone for Signer

fn clone(&self) -> Signer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Signer

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

Formats the value using the given formatter.