privy 0.10.0

Privy auth and transaction sending in Rust
Documentation 
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use anyhow::Result;

#[derive(Clone)]
pub struct PrivyConfig {
    pub app_id: String,
    pub app_secret: String,
    pub verification_key: String,
}

fn redact_secret(s: &str) -> String {
    let first_three = s.chars().take(3).collect::<String>();
    let last_three = s.chars().rev().take(3).collect::<String>();
    let length = s.len();
    let filled_length = length - 6;
    let filled_string = "*".repeat(filled_length);
    format!("{}{}{}", first_three, filled_string, last_three)
}

impl std::fmt::Debug for PrivyConfig {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(
            f,
            "PrivyConfig {{ app_id: {}, app_secret: {}, verification_key: {} }}",
            self.app_id,
            redact_secret(&self.app_secret),
            redact_secret(&self.verification_key)
        )
    }
}

#[derive(Debug, thiserror::Error)]
pub enum PrivyConfigError {
    #[error("[Privy] Missing required environment variable: {0}")]
    MissingEnvVar(&'static str),
}

impl PrivyConfig {
    pub fn from_env() -> Result<Self, PrivyConfigError> {
        let app_id = std::env::var("PRIVY_APP_ID")
            .map_err(|_| PrivyConfigError::MissingEnvVar("PRIVY_APP_ID"))?;

        let app_secret = std::env::var("PRIVY_APP_SECRET")
            .map_err(|_| PrivyConfigError::MissingEnvVar("PRIVY_APP_SECRET"))?;

        let verification_key = std::env::var("PRIVY_VERIFICATION_KEY")
            .map_err(|_| PrivyConfigError::MissingEnvVar("PRIVY_VERIFICATION_KEY"))?;

        Ok(Self {
            app_id,
            app_secret,
            verification_key,
        })
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_privy_config_from_env() {
        PrivyConfig::from_env().unwrap();
    }
}