o402 0.1.2

OpenAI-compatible gateway, paid with x402.
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//! algorand exact accepts (`avm` feature).

use r402_protocol::network::ChainId;
use r402_protocol::payment::PriceTag;

#[cfg(not(feature = "avm"))]
use super::feature_missing;
#[cfg(feature = "avm")]
use super::{
    accept_custom_decimals, amount_u64, custom_asset_address, invalid_network, invalid_pay_to,
    named_ticker, no_deployment, reject_evm_fields, require_exact,
};
use crate::config::{AcceptConfig, ConfigError};

#[cfg(not(feature = "avm"))]
pub(super) fn build(
    _accept: &AcceptConfig,
    _network: &ChainId,
    _amount: u128,
    _pay_to: &str,
) -> Result<PriceTag, ConfigError> {
    Err(feature_missing("algorand", "avm"))
}

#[cfg(not(feature = "avm"))]
pub(super) fn decimals(_accept: &AcceptConfig, _network: &ChainId) -> Result<u8, ConfigError> {
    Err(feature_missing("algorand", "avm"))
}

#[cfg(feature = "avm")]
pub(super) fn decimals(accept: &AcceptConfig, network: &ChainId) -> Result<u8, ConfigError> {
    Ok(token(accept, network)?.decimals)
}

#[cfg(feature = "avm")]
pub(super) fn build(
    accept: &AcceptConfig,
    network: &ChainId,
    amount: u128,
    pay_to: &str,
) -> Result<PriceTag, ConfigError> {
    use std::str::FromStr as _;

    use r402_avm::AlgorandExact;
    use r402_avm::chain::AlgorandAddress;

    require_exact(accept)?;
    reject_evm_fields(accept, "algorand")?;
    let amount = amount_u64(amount, "algorand")?;
    let pay_to = AlgorandAddress::from_str(pay_to)
        .map_err(|error| invalid_pay_to("Algorand", pay_to, error))?;
    let token = token(accept, network)?;
    Ok(AlgorandExact::price_tag(pay_to, token.amount(amount)))
}

#[cfg(feature = "avm")]
fn token(
    accept: &AcceptConfig,
    network: &ChainId,
) -> Result<r402_avm::chain::AlgorandTokenDeployment, ConfigError> {
    use r402_avm::USDC;
    use r402_avm::chain::{AlgorandChainReference, AlgorandTokenDeployment};

    let chain = AlgorandChainReference::try_from(network.clone())
        .map_err(|error| invalid_network("algorand", &accept.network, error))?;
    if named_ticker(accept, &["usdc"])?.is_some() {
        return USDC::on(chain)
            .copied()
            .ok_or_else(|| no_deployment("USDC", &accept.network));
    }
    let address = custom_asset_address(accept)?;
    let asset_id: u64 = address.parse().map_err(|_| {
        ConfigError::Validation(format!(
            "algorand asset_address '{address}' must be an ASA id decimal string"
        ))
    })?;
    Ok(AlgorandTokenDeployment::new(
        chain,
        asset_id,
        accept_custom_decimals(accept)?,
    ))
}