[fix] crypto:ed25519: must support pubkey of 31 bytes

lib/crypto/src/bases/b58.rs

@@ -24,7 +24,8 @@ pub trait ToBase58 {
 }
 
 /// Create an array of 32 bytes from a Base58 string.
-pub fn str_base58_to_32bytes(base58_data: &str) -> Result<[u8; 32], BaseConvertionError> {
+pub fn str_base58_to_32bytes(base58_data: &str) -> Result<([u8; 32], usize), BaseConvertionError> {
+    debug!("str_base58_to_32bytes({});", base58_data);
     match bs58::decode(base58_data).into_vec() {
         Ok(result) => {
             if result.len() == 32 {
@@ -32,7 +33,13 @@ pub fn str_base58_to_32bytes(base58_data: &str) -> Result<[u8; 32], BaseConverti
 
                 u8_array[..32].clone_from_slice(&result[..32]);
 
-                Ok(u8_array)
+                Ok((u8_array, 32))
+            } else if result.len() == 31 {
+                let mut u8_array = [0; 32];
+
+                u8_array[..31].clone_from_slice(&result[..31]);
+
+                Ok((u8_array, 31))
             } else {
                 Err(BaseConvertionError::InvalidLength {
                     expected: 32,