riftenlabs-indexer/src/rpc/price.rs

// Copyright (C) 2024 Riften Labs AS
//
// This software is licensed under the GNU Affero General Public License (AGPL), version 3.0 or later.
// A copy of the license can be found in the LICENSE file or at https://www.gnu.org/licenses/agpl-3.0.html

use anyhow::{bail, Context, Result};
use bitcoin_hashes::hex::{FromHex, ToHex};
use bitcoincash::TokenID;
use rocket::{get, http::Status, response::status::Custom, serde::json::Json, State};
use rusqlite::{params, Connection};
use rust_decimal::prelude::*;
use serde_json::{json, Value};

use crate::{
    db::{cauldron::pool::db_list_active_pools, DB},
    timeutil::time_now,
};

struct PriceInterval {
    start: i64,
    step: i64,
    sats: i64,
    tokens: i64,
    min: f64,
    max: f64,
}

impl PriceInterval {
    pub fn new(start: i64, step: i64) -> Self {
        Self {
            start,
            step,
            sats: 0,
            tokens: 0,
            min: f64::MAX,
            max: f64::MIN,
        }
    }

    pub fn next(&self) -> Self {
        let new_start = self.start + self.step;
        Self::new(new_start, self.step)
    }

    pub fn end(&self) -> i64 {
        self.start + self.step
    }

    pub fn avg_price(&self) -> Option<f64> {
        if self.tokens == 0 {
            return None;
        }
        Some(self.sats as f64 / self.tokens as f64)
    }

    pub fn add_pool(&mut self, sats: i64, tokens: i64) {
        if tokens != 0 {
            let price = sats as f64 / tokens as f64;
            if price > self.max {
                self.max = price
            }
            if price < self.min {
                self.min = price
            }
        }
        self.sats += sats;
        self.tokens += tokens;
    }

    pub fn to_result(&self) -> Option<(i64, f64, f64, f64)> {
        if self.tokens == 0 {
            None
        } else {
            Some((
                self.start,
                self.avg_price().expect("avg price not calculated"),
                self.max,
                self.min,
            ))
        }
    }
}

// Get the current price of a given token
fn current_price(db: &Connection, token_id: &str) -> Result<f64> {
    let active = db_list_active_pools(Some(token_id), None, db, false)?;

    let mut sats: u128 = 0;
    let mut tokens: u128 = 0;

    for pool in active {
        sats += pool.sats as u128;
        tokens += pool.tokens as u128;
    }

    let sum_sats = Decimal::from_u128(sats).context("overflow")?;
    let sum_tokens = Decimal::from_u128(tokens).context("overflow")?;

    let price = sum_sats.checked_div(sum_tokens).unwrap_or_default();

    price.to_f64().context("overflow")
}

#[allow(clippy::type_complexity)]
fn historic_price(
    connection: &Connection,
    timestamp_start: i64, // Start timestamp in posix
    timestamp_end: i64,   // End timestamp in posix
    step_size: i64,       // Interval in seconds (e.g., 600 for 10 minutes)
    token_id: &str,
) -> Result<Vec<(i64, f64, f64, f64)>> {
    if timestamp_start > timestamp_end {
        bail!("Start cannot be higher than end");
    }

    let total_intervals = (timestamp_end - timestamp_start) / step_size;

    const MAX_INTERVALS: i64 = 10000;
    if total_intervals > MAX_INTERVALS {
        bail!(
            "Too many intervals ({} > {})",
            total_intervals,
            MAX_INTERVALS
        );
    }

    // Prepare and execute the SQL query for the current interval
    let sql = "
    SELECT
        COALESCE(tx.first_seen_timestamp, tx.mtp_timestamp) AS effective_timestamp,
        utxo_funding.sats,
        utxo_funding.token_amount
    FROM
        utxo_funding
    LEFT JOIN
        tx ON utxo_funding.txid = tx.txid
    WHERE
        utxo_funding.token_id = ? AND
        effective_timestamp >= ? AND
        effective_timestamp < ?
    ORDER BY
        effective_timestamp ASC
";
    let mut statement = connection.prepare(sql)?;

    let mut rows = statement.query(params![token_id, timestamp_start, timestamp_end])?;

    let mut result: Vec<(i64, f64, f64, f64)> = Vec::with_capacity(total_intervals as usize);

    let mut current_interval = PriceInterval::new(timestamp_start, step_size);

    while let Some(row) = rows.next()? {
        let timestamp: i64 = row.get(0)?;
        let sats: i64 = row.get(1)?;
        let tokens: i64 = row.get(2)?;

        if timestamp >= current_interval.end() {
            if let Some(r) = current_interval.to_result() {
                result.push(r);
            }
            loop {
                current_interval = current_interval.next();
                if timestamp < current_interval.end() {
                    break;
                }
            }
        }

        current_interval.add_pool(sats, tokens);
    }

    // final trade window
    if let Some(r) = current_interval.to_result() {
        result.push(r);
    }

    Ok(result)
}

fn price_at_or_before(
    connection: &Connection,
    timestamp: i64,
    token_id: &TokenID,
) -> Result<(i64, f64)> {
    let sql = "
  WITH max_timestamps AS (
      SELECT
          phe.pool,
          MAX(COALESCE(phe.first_seen_timestamp, phe.mtp_timestamp)) AS max_effective_timestamp
      FROM
          pool_history_entry phe
      JOIN
          utxo_funding uf ON phe.utxo = uf.new_utxo_hash
      WHERE
          COALESCE(phe.first_seen_timestamp, phe.mtp_timestamp) <= ?
          AND uf.token_id = ?
      GROUP BY
          phe.pool
  )
  SELECT
      uf.token_amount,
      uf.sats,
      COALESCE(phe.first_seen_timestamp, phe.mtp_timestamp) AS effective_timestamp
  FROM
      pool_history_entry phe
  JOIN
      utxo_funding uf ON phe.utxo = uf.new_utxo_hash
  JOIN
      pool p ON p.creation_utxo = phe.pool
  JOIN
      max_timestamps mt ON phe.pool = mt.pool
      AND COALESCE(phe.first_seen_timestamp, phe.mtp_timestamp) = mt.max_effective_timestamp
  WHERE
      p.withdrawn_in_utxo IS NULL
  ";

    let mut statement = connection.prepare(sql)?;
    let mut rows = statement.query(params![timestamp, token_id.to_hex()])?;

    let mut sum_sats: u64 = 0;
    let mut sum_tokens: u64 = 0;
    let mut latest_timestamp = 0;

    while let Some(row) = rows.next()? {
        let token_amount: i64 = row.get(0)?;
        let sats: i64 = row.get(1)?;
        let row_timestamp: i64 = row.get(2)?;

        if sats >= 0 && token_amount >= 0 {
            sum_sats += sats as u64;
            sum_tokens += token_amount as u64;
        }

        if row_timestamp > latest_timestamp {
            latest_timestamp = row_timestamp;
        }
    }

    let sum_sats_decimal = Decimal::from_u64(sum_sats).unwrap_or_default();
    let sum_tokens_decimal = Decimal::from_u64(sum_tokens).unwrap_or_default();

    let overall_price = sum_sats_decimal
        .checked_div(sum_tokens_decimal)
        .context("Division failed: sum_tokens is zero or invalid")?;

    let overall_price_f64 = overall_price.to_f64().context("Conversion to f64 failed")?;

    Ok((latest_timestamp, overall_price_f64))
}

#[get("/price/<token>/at/<timestamp>")]
pub fn price_at(
    token: &str,
    timestamp: &str,
    conn: &State<DB>,
) -> Result<Json<Value>, Custom<String>> {
    let timestamp: i64 = timestamp.parse().map_err(|_| {
        Custom(
            Status::BadRequest,
            "Invalid timestamp format. Must be a valid number.".to_string(),
        )
    })?;

    let db = conn
        .cauldron_r
        .get()
        .map_err(|e| Custom(Status::InternalServerError, format!("Error: {}", e)))?;

    let current_time = time_now();
    if timestamp > current_time {
        return Err(Custom(
            Status::BadRequest,
            "Timestamp is in the future".to_string(),
        ));
    }
    let token = TokenID::from_hex(token)
        .map_err(|e| Custom(Status::BadRequest, format!("Error: {}", e)))?;

    match price_at_or_before(&db, timestamp, &token) {
        Ok((latest_timestamp, price)) => Ok(Json(json!({
            "timestamp": latest_timestamp,
            "price": price
        }))),
        Err(e) => Err(Custom(
            Status::InternalServerError,
            format!("Error fetching price: {}", e),
        )),
    }
}

#[get("/price/<token>/current")]
pub fn price_current(token: &str, conn: &State<DB>) -> Result<Json<Value>, Custom<String>> {
    let db = conn
        .cauldron_r
        .get()
        .map_err(|e| Custom(Status::InternalServerError, format!("Error: {}", e)))?;

    let price = current_price(&db, token)
        .map_err(|e| Custom(Status::InternalServerError, format!("Error: {}", e)))?;

    Ok(Json(json!({
        "price": price,
    })))
}

#[get("/price/<token>/history?<start>&<end>&<stepsize>")]
pub fn price_history(
    token: &str,
    start: Option<i64>,
    end: Option<i64>,
    stepsize: Option<i64>,
    conn: &State<DB>,
) -> Result<Json<Value>, Custom<String>> {
    let current_timestamp = time_now();

    let db = conn
        .cauldron_r
        .get()
        .map_err(|e| Custom(Status::InternalServerError, format!("Error: {}", e)))?;

    let history = historic_price(
        &db,
        start.unwrap_or(current_timestamp - 30 * 24 * 3600 /* 30 days */),
        end.unwrap_or(current_timestamp),
        stepsize.unwrap_or(3600 /* 1 hour */),
        token,
    )
    .map_err(|e| Custom(Status::BadRequest, format!("Error: {}", e)))?;

    let history_json: Vec<Value> = history
        .iter()
        .map(|(time, avg, max, min)| {
            json!({
                "time": time,
                "avg": avg,
                "max": max,
                "min": min,
            })
        })
        .collect();

    Ok(Json(json!({
        "history": json!(history_json)
    })))
}

#[cfg(test)]
mod tests {
    use crate::db::cauldron::{
        pool::{
            self, dummy_init_seq, flag_as_withdrawn, insert_new_pool, insert_pool_history_entry,
        },
        tx::{self, insert_block_tx, insert_mempool_tx},
        utxo_funding::{self, insert_utxo_funding},
    };
    use crate::utiltest::mock_db_pool;

    use super::*;
    use bitcoin_hashes::Hash;
    use bitcoincash::{BlockHash, PubkeyHash, Txid};
    use riftenlabs_defi::{cauldron::ParsedContract, chainutil::OutPointHash};
    use rocket::http::Status;
    use rocket::local::blocking::Client;
    use rocket::routes;
    use rusqlite::Connection;

    const TIME_1: u64 = 1727963300;
    const TIME_2: u64 = 1727963350;
    const TIME_3: u64 = 1727963400;

    fn dummy_cauldron(
        txid: &Txid,
        utxo: &OutPointHash,
        token: &TokenID,
        sats: u64,
        tokens: i64,
        pkh: &PubkeyHash,
    ) -> ParsedContract {
        ParsedContract {
            pkh: pkh.clone(),
            is_withdrawn: false,
            spent_utxo_hash: OutPointHash::all_zeros(),
            new_utxo_hash: Some(utxo.clone()),
            new_utxo_txid: Some(txid.clone()),
            new_utxo_n: Some(0),
            token_id: Some(token.clone()),
            sats: Some(sats),
            token_amount: Some(tokens),
        }
    }

    fn setup_mock_db(conn: &Connection) {
        utxo_funding::create_table(conn);
        tx::create_table(conn);
        pool::create_table(conn);
        dummy_init_seq();

        let token_zero = TokenID::all_zeros();
        let pkh_zero = PubkeyHash::all_zeros();

        let txid1 = Txid::from_inner([0xf0; 32]);
        let txid2 = Txid::from_inner([0xf1; 32]);
        let txid3 = Txid::from_inner([0xf2; 32]);
        let utxo1 = OutPointHash::from_inner([0xe0; 32]);
        let utxo2 = OutPointHash::from_inner([0xe1; 32]);
        let utxo3 = OutPointHash::from_inner([0xe2; 32]);

        // Insert mock data into utxo_funding
        let cauldron1 = dummy_cauldron(&txid1, &utxo1, &token_zero, 50000, 1000, &pkh_zero);
        let cauldron2 = dummy_cauldron(&txid2, &utxo2, &token_zero, 60000, 2000, &pkh_zero);
        let cauldron3 = dummy_cauldron(&txid2, &utxo3, &token_zero, 90000, 3000, &pkh_zero);
        insert_utxo_funding(&conn, &vec![cauldron1.clone()], &txid1, true).unwrap();
        insert_utxo_funding(&conn, &vec![cauldron2.clone()], &txid2, true).unwrap();
        insert_utxo_funding(&conn, &vec![cauldron3.clone()], &txid3, true).unwrap();

        // Insert mock data into tx table
        let block_zero = BlockHash::all_zeros();
        insert_block_tx(&conn, &txid1, &block_zero, TIME_1 as i64).unwrap();
        insert_mempool_tx(&conn, &txid1, TIME_1).unwrap();
        insert_block_tx(&conn, &txid2, &block_zero, TIME_2 as i64).unwrap();
        insert_mempool_tx(&conn, &txid2, TIME_2).unwrap();
        insert_block_tx(&conn, &txid3, &block_zero, TIME_3 as i64).unwrap();
        insert_mempool_tx(&conn, &txid3, TIME_3).unwrap();

        // Insert mock data into `pool_history_entry`
        let pool1 = OutPointHash::from_inner([0x0a; 32]);
        let pool2 = OutPointHash::from_inner([0x0b; 32]);
        let pool3 = OutPointHash::from_inner([0x0c; 32]);
        let txid1_newer = Txid::from_inner([0xf3; 32]);
        let utxo1_newer = OutPointHash::from_inner([0xe3; 32]);
        insert_pool_history_entry(&conn, &pool1, &cauldron1, Some(TIME_1), Some(TIME_1)).unwrap();
        insert_pool_history_entry(&conn, &pool2, &cauldron2, Some(TIME_2), Some(TIME_2)).unwrap();
        insert_pool_history_entry(&conn, &pool3, &cauldron3, Some(TIME_3), Some(TIME_3)).unwrap();

        // Insert newer entry for pool1
        let cauldron1_newer = dummy_cauldron(
            &txid1_newer,
            &utxo1_newer,
            &token_zero,
            70000,
            1500,
            &pkh_zero,
        );
        insert_pool_history_entry(
            &conn,
            &pool1,
            &cauldron1_newer,
            Some(1727963500),
            Some(1727963500),
        )
        .unwrap();
        insert_utxo_funding(&conn, &vec![cauldron1_newer], &txid1_newer, true).unwrap();

        // Insert active pools with required columns (owner_pkh and token_id)
        let token1 = TokenID::from_inner([0xda; 32]);
        let token2 = TokenID::from_inner([0xdb; 32]);
        let token3 = TokenID::from_inner([0xdc; 32]);
        let pkh1 = PubkeyHash::from_inner([0xca; 20]);
        let pkh2 = PubkeyHash::from_inner([0xcb; 20]);
        let pkh3 = PubkeyHash::from_inner([0xcc; 20]);
        insert_new_pool(
            &conn,
            &dummy_cauldron(&Txid::all_zeros(), &pool1, &token1, 0, 0, &pkh1),
        )
        .unwrap();
        insert_new_pool(
            &conn,
            &dummy_cauldron(&Txid::all_zeros(), &pool2, &token2, 0, 0, &pkh2),
        )
        .unwrap();
        insert_new_pool(
            &conn,
            &dummy_cauldron(&Txid::all_zeros(), &pool3, &token3, 0, 0, &pkh3),
        )
        .unwrap();

        // Insert an inactive pool
        let inactive_pool = OutPointHash::from_inner([0xaa; 32]);
        //let inactive_withdrawn_utxo = OutPointHash::from_inner([0xab; 32]);
        let inactive_token = TokenID::from_inner([0xac; 32]);
        let inactive_pkh = PubkeyHash::from_inner([0xac; 20]);
        let inactive_txid = Txid::from_inner([0xad; 32]);
        let inactive_cauldron = dummy_cauldron(
            &inactive_txid,
            &inactive_pool,
            &inactive_token,
            80000,
            2500,
            &inactive_pkh,
        );
        let inactive_cauldron_withdraw = ParsedContract {
            pkh: inactive_pkh,
            is_withdrawn: true,
            spent_utxo_hash: inactive_pool,
            new_utxo_hash: None,
            new_utxo_txid: None,
            new_utxo_n: None,
            token_id: None,
            sats: None,
            token_amount: None,
        };

        insert_new_pool(&conn, &inactive_cauldron).unwrap();
        insert_utxo_funding(
            &conn,
            &vec![inactive_cauldron.clone()],
            &inactive_txid,
            true,
        )
        .unwrap();
        insert_pool_history_entry(
            &conn,
            &inactive_pool,
            &inactive_cauldron,
            Some(1727963350),
            Some(1727963350),
        )
        .unwrap();
        flag_as_withdrawn(&conn, &inactive_pool, &inactive_cauldron_withdraw).unwrap();
    }

    #[test]
    fn test_price_at_specific_time() {
        let mock_db = mock_db_pool(setup_mock_db);

        let rocket = rocket::build()
            .manage(mock_db)
            .mount("/cauldron", routes![price_at]);

        let client = Client::tracked(rocket).expect("valid rocket instance");

        let token_id = TokenID::all_zeros().to_hex();

        // Test 1: Querying at a timestamp that exactly matches test_txid1
        let timestamp = TIME_1;
        let response = client
            .get(format!("/cauldron/price/{}/at/{}", token_id, timestamp))
            .dispatch();
        assert_eq!(response.status(), Status::Ok);

        let json_value: serde_json::Value =
            serde_json::from_str(response.into_string().unwrap().as_str()).unwrap();
        let actual_price = json_value["price"]
            .as_f64()
            .expect("Price field is not a valid f64");

        // Expected price based on 50,000 sats and 1,000 tokens
        let expected_price = 50.0;
        assert!((actual_price - expected_price).abs() < 0.01);

        // Test 2: Querying at a timestamp that includes Pool 1 and Pool 2
        let timestamp = TIME_2;
        let response = client
            .get(format!("/cauldron/price/{}/at/{}", token_id, timestamp))
            .dispatch();
        assert_eq!(response.status(), Status::Ok);
        let json_value: serde_json::Value =
            serde_json::from_str(response.into_string().unwrap().as_str()).unwrap();
        let actual_price = json_value["price"]
            .as_f64()
            .expect("Price field is not a valid f64");

        // The combined price should be 36.67 (rounded)
        let expected_price = 36.67;
        assert!(
            (actual_price - expected_price).abs() < 0.01,
            "expected {} != actual {}",
            expected_price,
            actual_price
        );

        // Test 3: Querying a timestamp that includes Pool 1, Pool 2, and Pool 3
        let timestamp = TIME_3;
        let response = client
            .get(format!("/cauldron/price/{}/at/{}", token_id, timestamp))
            .dispatch();
        assert_eq!(response.status(), Status::Ok);
        let json_value: serde_json::Value =
            serde_json::from_str(response.into_string().unwrap().as_str()).unwrap();
        let actual_price = json_value["price"]
            .as_f64()
            .expect("Price field is not a valid f64");

        // The combined price should be 33.33 (rounded)
        let expected_price = 33.33;
        assert!((actual_price - expected_price).abs() < 0.01);
    }

    #[test]
    fn test_price_at_newer_timestamp_for_pool1() {
        let mock_db = mock_db_pool(setup_mock_db);

        let rocket = rocket::build()
            .manage(mock_db.clone())
            .mount("/cauldron", routes![price_at]);

        let client = Client::tracked(rocket).expect("valid rocket instance");

        let token_id = TokenID::all_zeros().to_hex();

        // Test: Query at a newer timestamp (1727963500) for pool1 and ensure it only accounts for the newer entry
        let timestamp = 1727963500; // Newer timestamp
        let response = client
            .get(format!("/cauldron/price/{}/at/{}", token_id, timestamp))
            .dispatch();
        assert_eq!(response.status(), Status::Ok);

        let json_value: serde_json::Value =
            serde_json::from_str(response.into_string().unwrap().as_str()).unwrap();
        let actual_price = json_value["price"]
            .as_f64()
            .expect("Price field is not a valid f64");

        // Expected price based on the total from pool1, pool2, and pool3
        let expected_price = 33.85; // Rounded to 2 decimal places
        assert!(
            (actual_price - expected_price).abs() < 0.01,
            "expected {} != actual {}",
            expected_price,
            actual_price
        );
    }

    #[test]
    fn test_price_with_multiple_entries_at_same_timestamp() {
        let mock_db = mock_db_pool(setup_mock_db);

        let rocket = rocket::build()
            .manage(mock_db.clone())
            .mount("/cauldron", routes![price_at]);

        let client = Client::tracked(rocket).expect("valid rocket instance");

        let token_id = TokenID::all_zeros().to_hex();

        // Insert additional entries with the same timestamp for an existing pool (e.g., pool1)
        let conn = mock_db.cauldron_w.get().expect("Failed to get connection.");

        // These entries should have the same timestamp as previous mockdata and be counted in the price calculation
        let pool1 = OutPointHash::from_inner([0x0a; 32]);
        let txid = Txid::hash("txid_extra".as_bytes());

        let cauldron = dummy_cauldron(
            &txid,
            &OutPointHash::hash("utxo_extra".as_bytes()),
            &TokenID::all_zeros(),
            40000,
            500,
            &PubkeyHash::all_zeros(),
        );
        insert_pool_history_entry(&conn, &pool1, &cauldron, Some(TIME_1), Some(TIME_1)).unwrap();
        insert_utxo_funding(&conn, &vec![cauldron], &txid, true).unwrap();

        // Test: Query at the timestamp matching test_txid1 (1727963300) and check the price
        let timestamp = TIME_1;
        let response = client
            .get(format!("/cauldron/price/{}/at/{}", token_id, timestamp))
            .dispatch();
        assert_eq!(response.status(), Status::Ok);

        let json_value: serde_json::Value =
            serde_json::from_str(response.into_string().unwrap().as_str()).unwrap();
        let actual_price = json_value["price"]
            .as_f64()
            .expect("Price field is not a valid f64");

        // Expected price based on (50,000 + 40,000) sats and (1,000 + 500) tokens = 90,000 / 1,500 = 60.0
        let expected_price = 60.0;
        assert!((actual_price - expected_price).abs() < 0.01);
    }

    #[test]
    fn test_bad_token_hash() {
        let mock_db = mock_db_pool(setup_mock_db);

        let rocket = rocket::build()
            .manage(mock_db)
            .mount("/cauldron", routes![price_current, price_history, price_at]);

        let client = Client::tracked(rocket).expect("valid rocket instance");

        // Test the `/price/<token>/at/<timestamp>` endpoint with a bad token hash
        let bad_token_id = "bad_token_id";
        let timestamp = 1727963432; // Arbitrary timestamp

        let response = client
            .get(format!("/cauldron/price/{}/at/{}", bad_token_id, timestamp))
            .dispatch();
        assert_eq!(response.status(), Status::BadRequest);
    }

    #[test]
    fn test_timestamp_in_future() {
        let mock_db = mock_db_pool(setup_mock_db);

        let rocket = rocket::build()
            .manage(mock_db)
            .mount("/cauldron", routes![price_at]);

        let client = Client::tracked(rocket).expect("valid rocket instance");

        let token_id = TokenID::all_zeros().to_hex();
        let future_timestamp = (time_now() + 100000).to_string();

        let response = client
            .get(format!(
                "/cauldron/price/{}/at/{}",
                token_id, future_timestamp
            ))
            .dispatch();

        assert_eq!(response.status(), Status::BadRequest);
        let body = response.into_string().unwrap();
        assert!(body.contains("Timestamp is in the future"));
    }

    #[test]
    fn test_invalid_timestamp_format() {
        let mock_db = mock_db_pool(setup_mock_db);

        let rocket = rocket::build()
            .manage(mock_db)
            .mount("/cauldron", routes![price_at]);

        let client = Client::tracked(rocket).expect("valid rocket instance");

        // Test the `/price/<token>/at/<timestamp>` endpoint with an invalid timestamp
        let token_id = TokenID::all_zeros().to_hex();
        let invalid_timestamp = "ASDASD:";

        let response = client
            .get(format!(
                "/cauldron/price/{}/at/{}",
                token_id, invalid_timestamp
            ))
            .dispatch();

        assert_eq!(response.status(), Status::BadRequest);
        let body = response.into_string().unwrap();
        assert!(body.contains("Invalid timestamp format"));
    }
    #[test]
    fn test_price_with_high_tokens_and_low_sats() {
        let mock_db = mock_db_pool(setup_mock_db);

        let rocket = rocket::build()
            .manage(mock_db.clone())
            .mount("/cauldron", routes![price_at]);

        let client = Client::tracked(rocket).expect("valid rocket instance");

        let conn = mock_db.cauldron_w.get().expect("Failed to get connection.");

        // Insert high tokens and low sats
        let pool = OutPointHash::hash("many tokens pool".as_bytes());
        let txid = Txid::hash("many tokens txid".as_bytes());
        let utxo = OutPointHash::hash("many tokens utxo".as_bytes());
        let token = TokenID::hash("many tokens tokenid".as_bytes());

        let cauldron = dummy_cauldron(
            &txid,
            &utxo,
            &token,
            1,                /* low sats */
            9999999999999999, /* many tokens */
            &PubkeyHash::all_zeros(),
        );
        insert_utxo_funding(&conn, &vec![cauldron.clone()], &txid, true).unwrap();
        insert_pool_history_entry(&conn, &pool, &cauldron, Some(TIME_1), Some(TIME_1)).unwrap();

        // Test: Querying the price with high tokens and low sats
        let response = client
            .get(format!("/cauldron/price/{}/at/{}", token.to_hex(), TIME_1))
            .dispatch();

        // Expect that we could not handle the calculation/conversion.
        assert_eq!(response.status(), Status::InternalServerError);
    }
}