solana-tools-lite 0.1.2

A lightweight, SDK-free, offline-first signing toolkit for Solana keys, messages, and transactions.
Documentation 
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use crate::errors::TransactionParseError;
use serde::de::{self, Deserializer, Visitor};
use serde::{Deserialize, Serialize};
use std::fmt;

/// A wrapper for a 32-byte hash (typically a recent blockhash).
///
/// Blockhashes are used in Solana transactions for replay protection and to define
/// the transaction's lifetime on the network.
#[derive(Clone, Copy)]
pub struct HashBase58(pub [u8; 32]);

impl Serialize for HashBase58 {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        self.0.serialize(serializer)
    }
}

impl<'de> Deserialize<'de> for HashBase58 {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        struct HashVisitor;

        impl<'de> Visitor<'de> for HashVisitor {
            type Value = HashBase58;

            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
                formatter.write_str("a byte array of length 32")
            }

            fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                if v.len() != 32 {
                    return Err(E::invalid_length(v.len(), &self));
                }
                let mut array = [0u8; 32];
                array.copy_from_slice(v);
                Ok(HashBase58(array))
            }
        }

        deserializer.deserialize_bytes(HashVisitor)
    }
}

impl TryFrom<&str> for HashBase58 {
    type Error = TransactionParseError;

    fn try_from(s: &str) -> Result<Self, Self::Error> {
        let bytes = bs58::decode(s)
            .into_vec()
            .map_err(|e| TransactionParseError::InvalidBlockhashFormat(e.to_string()))?;

        if bytes.len() != 32 {
            return Err(TransactionParseError::InvalidBlockhashLength(bytes.len()));
        }
        let mut array = [0u8; 32];
        array.copy_from_slice(&bytes);

        Ok(HashBase58(array))
    }
}

impl fmt::Display for HashBase58 {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{}", bs58::encode(self.0).into_string())
    }
}

impl fmt::Debug for HashBase58 {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "HashBase58({})", self)
    }
}

use std::str::FromStr;

impl FromStr for HashBase58 {
    type Err = TransactionParseError;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        HashBase58::try_from(s)
    }
}