nautilus_blockchain/cache/
rows.rs

1// -------------------------------------------------------------------------------------------------
2//  Copyright (C) 2015-2025 Posei Systems Pty Ltd. All rights reserved.
3//  https://poseitrader.io
4//
5//  Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
6//  You may not use this file except in compliance with the License.
7//  You may obtain a copy of the License at https://www.gnu.org/licenses/lgpl-3.0.en.html
8//
9//  Unless required by applicable law or agreed to in writing, software
10//  distributed under the License is distributed on an "AS IS" BASIS,
11//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12//  See the License for the specific language governing permissions and
13//  limitations under the License.
14// -------------------------------------------------------------------------------------------------
15
16use alloy::primitives::Address;
17use nautilus_core::UnixNanos;
18use sqlx::{FromRow, Row, postgres::PgRow};
19
20use crate::validation::validate_address;
21
22/// A data transfer object that maps database rows to token data.
23///
24/// Implements `FromRow` trait to automatically convert PostgreSQL results into `TokenRow`
25/// objects that can be transformed into domain entity `Token` objects.
26#[derive(Debug)]
27pub struct TokenRow {
28    pub address: Address,
29    pub name: String,
30    pub symbol: String,
31    pub decimals: i32,
32}
33
34impl<'r> FromRow<'r, PgRow> for TokenRow {
35    fn from_row(row: &'r PgRow) -> Result<Self, sqlx::Error> {
36        let address = validate_address(row.try_get::<String, _>("address")?.as_str()).unwrap();
37        let name = row.try_get::<String, _>("name")?;
38        let symbol = row.try_get::<String, _>("symbol")?;
39        let decimals = row.try_get::<i32, _>("decimals")?;
40
41        let token = Self {
42            address,
43            name,
44            symbol,
45            decimals,
46        };
47        Ok(token)
48    }
49}
50
51/// A data transfer object that maps database rows to block timestamp data.
52#[derive(Debug)]
53pub struct BlockTimestampRow {
54    /// The block number.
55    pub number: u64,
56    /// The block timestamp.
57    pub timestamp: UnixNanos,
58}
59
60impl FromRow<'_, PgRow> for BlockTimestampRow {
61    fn from_row(row: &PgRow) -> Result<Self, sqlx::Error> {
62        let number = row.try_get::<i64, _>("number")? as u64;
63        let timestamp = row.try_get::<String, _>("timestamp")?;
64        Ok(Self {
65            number,
66            timestamp: UnixNanos::from(timestamp),
67        })
68    }
69}
nautilus_blockchain/cache/rows.rs

nautilus_blockchain/cache/
rows.rs
