avalanche-sdk 0.58.0

use std::{
    io::{self, Error, ErrorKind},
    time::{Duration, SystemTime},
};

use crate::p as api_p;
use avalanche_types::{
    avax,
    choices::status::Status,
    formatting,
    ids::{self, node},
    key, platformvm, secp256k1fx, units,
};
use chrono::{DateTime, NaiveDateTime, Utc};
use tokio::time::sleep;

/// Represents P-chain "AddSubnetValidator" transaction.
/// ref. https://github.com/ava-labs/avalanchego/blob/v1.9.0/wallet/chain/p/builder.go#L360-L390 "NewAddSubnetValidatorTx"
/// ref. https://github.com/ava-labs/avalanchego/blob/v1.9.0/vms/platformvm/txs/builder/builder.go#L512 "NewAddSubnetValidatorTx"
#[derive(Clone, Debug)]
pub struct Tx<T>
where
    T: key::secp256k1::ReadOnly + key::secp256k1::SignOnly + Clone,
{
    pub inner: crate::wallet::p::P<T>,

    pub node_id: node::Id,
    pub subnet_id: ids::Id,
    pub weight: u64,

    pub start_time: DateTime<Utc>,
    pub end_time: DateTime<Utc>,

    /// Set "true" to poll transaction status after issuance for its acceptance.
    pub check_acceptance: bool,
}

impl<T> Tx<T>
where
    T: key::secp256k1::ReadOnly + key::secp256k1::SignOnly + Clone,
{
    pub fn new(p: &crate::wallet::p::P<T>) -> Self {
        let now_unix = SystemTime::now()
            .duration_since(SystemTime::UNIX_EPOCH)
            .expect("unexpected None duration_since")
            .as_secs();

        let start_time = now_unix + 60;
        let native_dt = NaiveDateTime::from_timestamp(start_time as i64, 0);
        let start_time = DateTime::<Utc>::from_utc(native_dt, Utc);

        // 30-day
        let end_time = now_unix + 30 * 24 * 60 * 60;
        let native_dt = NaiveDateTime::from_timestamp(end_time as i64, 0);
        let end_time = DateTime::<Utc>::from_utc(native_dt, Utc);

        Self {
            inner: p.clone(),
            node_id: node::Id::empty(),
            subnet_id: ids::Id::empty(),
            weight: 2 * units::KILO_AVAX,
            start_time,
            end_time,
            check_acceptance: false,
        }
    }

    /// Sets the subnet validator node Id.
    #[must_use]
    pub fn node_id(mut self, node_id: node::Id) -> Self {
        self.node_id = node_id;
        self
    }

    /// Sets the subnet Id.
    #[must_use]
    pub fn subnet_id(mut self, subnet_id: ids::Id) -> Self {
        self.subnet_id = subnet_id;
        self
    }

    /// Sets the stake amount.
    #[must_use]
    pub fn weight(mut self, weight: u64) -> Self {
        self.weight = weight;
        self
    }

    /// Sets the validate start time.
    #[must_use]
    pub fn start_time(mut self, start_time: DateTime<Utc>) -> Self {
        self.start_time = start_time;
        self
    }

    /// Sets the validate start time.
    #[must_use]
    pub fn end_time(mut self, end_time: DateTime<Utc>) -> Self {
        self.end_time = end_time;
        self
    }

    /// Sets the check acceptance boolean flag.
    #[must_use]
    pub fn check_acceptance(mut self, check_acceptance: bool) -> Self {
        self.check_acceptance = check_acceptance;
        self
    }

    /// Issues the add subnet validator transaction and returns the transaction Id.
    /// If the validator is already a validator, it returns an empty Id and false.
    pub async fn issue(&self) -> io::Result<(ids::Id, bool)> {
        let picked_http_rpc = self.inner.inner.pick_http_rpc();
        log::info!(
            "adding {} as validator for subnet {} with weight {} via {}",
            self.node_id,
            self.subnet_id,
            self.weight,
            picked_http_rpc.1
        );

        let already_validator = self
            .inner
            .is_subnet_validator(&self.node_id, &self.subnet_id)
            .await?;
        if already_validator {
            log::warn!(
                "node Id {} is already a subnet validator -- returning empty tx Id",
                self.node_id
            );
            return Ok((ids::Id::empty(), false));
        }

        let cur_balance_p = self.inner.balance().await?;
        if cur_balance_p < self.inner.inner.tx_fee {
            return Err(Error::new(
                ErrorKind::InvalidInput,
                format!("key address {} (balance {} nano-AVAX, network {}) does not have enough to cover stake amount + fee {}", self.inner.inner.p_address, cur_balance_p, self.inner.inner.network_name, self.inner.inner.tx_fee),
             ));
        };

        let (ins, unstaked_outs, _, signers) = self.inner.spend(0, self.inner.inner.tx_fee).await?;

        let mut tx = platformvm::add_subnet_validator::Tx {
            unsigned_tx: avax::BaseTx {
                network_id: self.inner.inner.network_id,
                blockchain_id: self.inner.inner.p_chain_id,
                transferable_outputs: Some(unstaked_outs),
                transferable_inputs: Some(ins),
                ..Default::default()
            },
            validator: platformvm::add_subnet_validator::Validator {
                validator: platformvm::Validator {
                    node_id: self.node_id.clone(),
                    start: self.start_time.timestamp() as u64,
                    end: self.end_time.timestamp() as u64,
                    weight: self.weight,
                },
                subnet_id: self.subnet_id,
            },
            subnet_auth: secp256k1fx::Input {
                // TODO: support multiple keys?
                // right now, we only support one key
                sig_indices: vec![0_u32],
            },
            ..Default::default()
        };
        tx.sign(signers)?;

        let signed_bytes = tx.unsigned_tx.metadata.unwrap().bytes;
        let hex_tx = formatting::encode_hex_with_checksum(&signed_bytes);
        let resp = api_p::issue_tx(&picked_http_rpc.1, &hex_tx).await?;

        if let Some(e) = resp.error {
            // handle duplicate validator
            // ref. "avalanchego/vms/platformvm/txs/executor" "verifyAddValidatorTx"
            let already_validator = e.message.contains("duplicate validation");
            if already_validator {
                log::warn!(
                    "node Id {} is already a subnet validator -- returning empty tx Id ({})",
                    self.node_id,
                    e.message
                );
                return Ok((ids::Id::empty(), false));
            }

            return Err(Error::new(
                ErrorKind::Other,
                format!("failed to issue add subnet validator transaction {:?}", e),
            ));
        }

        let tx_id = resp.result.unwrap().tx_id;
        log::info!("{} successfully issued", tx_id);

        if !self.check_acceptance {
            log::debug!("skipping checking acceptance...");
            return Ok((tx_id, true));
        }

        // enough time for txs processing
        sleep(Duration::from_millis(500)).await;

        log::info!("polling to confirm add subnet validator transaction");
        loop {
            let resp = api_p::get_tx_status(&picked_http_rpc.1, &tx_id.to_string()).await?;

            let status = resp.result.unwrap().status;
            if status == Status::Accepted {
                log::info!("{} successfully accepted", tx_id);
                break;
            }

            log::warn!(
                "{} {} (not accepted yet in {})",
                tx_id,
                status,
                picked_http_rpc.1
            );
            sleep(Duration::from_millis(700)).await;
        }

        log::info!("polling to confirm subnet validator");
        loop {
            let already_validator = self
                .inner
                .is_subnet_validator(&self.node_id, &self.subnet_id)
                .await?;
            if already_validator {
                log::warn!("node Id {} is now a subnet validator", self.node_id);
                break;
            }

            log::warn!("node Id {} is not a subnet validator yet", self.node_id);
            sleep(Duration::from_millis(700)).await;
        }

        Ok((tx_id, true))
    }
}