Stash attempt at tracing exporting

.github/workflows/build.yml

@@ -1,33 +1,102 @@
-name: Build and Publish Docker Container
+name: Build and Publish
 
 on:
   push:
-    branches:
-      - main
+    branches: [ main ]
+
+env:
+  CARGO_TERM_COLOR: always
+  RUST_BINARY_NAME: monzo-ingestion
 
 jobs:
   build:
+    name: Build and Test
     runs-on: ubuntu-latest
-    container:
-      image: catthehacker/ubuntu:act-latest
+    container: catthehacker/ubuntu:act-latest
 
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          override: true
+          components: rustfmt, clippy
+
+      - name: Add ARM64 target
+        run: rustup target add aarch64-unknown-linux-musl
+
+      - name: Install ARM64 toolchain
+        run: |
+          apt-get update
+          apt-get install -y gcc-aarch64-linux-gnu build-essential musl-tools
+
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo
+            target/
+          key: "${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}"
+          restore-keys: |
+            ${{ runner.os }}-cargo-            
+
+      - name: Build (x86_64)
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --release --all-features
+
+      - name: Build (ARM64)
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --release --all-features --target aarch64-unknown-linux-musl
+        env:
+          CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER: aarch64-linux-gnu-gcc
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
 
-      - name: Login to Docker
-        uses: docker/login-action@v1
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
         with:
           registry: git.joshuacoles.me
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
 
-      - name: Build and Push Docker image
-        uses: docker/build-push-action@master
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: binaries
+          path: |
+            target/release/${{ env.RUST_BINARY_NAME }}
+            target/aarch64-unknown-linux-musl/release/${{ env.RUST_BINARY_NAME }}            
+
+      # The target directory is kept in the .dockerignore file, so allow these to be copied in we need to move them to a
+      # new directory.
+      - run: mv target docker-binaries
+
+      - name: Build and push multi-arch Docker image
+        uses: docker/build-push-action@v4
         with:
           context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm64
           push: true
-          tags: git.joshuacoles.me/personal/monzo-ingestion:latest
+          tags: git.joshuacoles.me/${{ github.repository }}:${{ github.sha }},git.joshuacoles.me/${{ github.repository }}:latest
+          build-args: |
+            BINARY_NAME=${{ env.RUST_BINARY_NAME }}
+
+      - uses: robiningelbrecht/ntfy-action@v1.0.0
+        name: Notify via ntfy.sh
+        if: always()
+        with:
+          url: ${{ secrets.NTFY_URL }}
+          topic: ${{ secrets.NTFY_TOPIC }}
+          job_status: ${{ job.status }}

Cargo.toml

@@ -9,27 +9,37 @@ migration = { path = "migration" }
 
 axum = { version = "0.7.5", features = ["multipart"] }
 tokio = { version = "1.37.0", features = ["full"] }
-sea-orm = { version = "1.0.0-rc.4", features = [
+sea-orm = { version = "1.0.0", features = [
     "sqlx-postgres",
     "runtime-tokio-rustls",
     "macros"
 ] }
 
-serde = { version = "1.0.203", features = ["derive"] }
-serde_json = "1.0.117"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
 tracing-subscriber = "0.3.18"
 tracing = "0.1.40"
-anyhow = "1.0.86"
-thiserror = "1.0.61"
-http = "1.1.0"
-chrono = { version = "0.4.38", features = ["serde"] }
-num-traits = "0.2.19"
+anyhow = { version = "1.0", features = ["backtrace"] }
+thiserror = "1.0"
+http = "1.1"
+chrono = { version = "0.4", features = ["serde"] }
+num-traits = "0.2"
 csv = "1.3.0"
-clap = "4.5.4"
-testcontainers = "0.17.0"
-testcontainers-modules = { version = "0.5.0", features = ["postgres"] }
-sqlx = { version = "0.7.4", features = ["postgres"] }
-tower-http = { version = "0.5.2", features = ["trace"] }
+clap = "4.5"
+testcontainers = "0.21"
+testcontainers-modules = { version = "0.9", features = ["postgres"] }
+sqlx = { version = "0.7", features = ["postgres"] }
+tower-http = { version = "0.5", features = ["trace"] }
+bytes = "1.7"
+once_cell = "1.19"
+
+tracing-opentelemetry = "0.25.0"
+opentelemetry = "0.24.0"
+opentelemetry_sdk = { version = "0.24.1", features = ["rt-tokio"] }
+opentelemetry-http = { version = "0.13.0", features = ["reqwest"] }
+opentelemetry-otlp = { version = "0.17.0", features = ["grpc-tonic", "http-json", "tokio"] }
+opentelemetry-semantic-conventions = "0.16.0"
+reqwest = "0.12.7"
 
 [workspace]
 members = [".", "migration", "entity"]

Dockerfile

@@ -1,78 +1,16 @@
-# syntax=docker/dockerfile:1
-
-# Comments are provided throughout this file to help you get started.
-# If you need more help, visit the Dockerfile reference guide at
-# https://docs.docker.com/engine/reference/builder/
-
-################################################################################
-# Create a stage for building the application.
-
-ARG RUST_VERSION=1.76.0
-ARG APP_NAME=monzo-ingestion
-FROM rust:${RUST_VERSION}-slim-bullseye AS build
-ARG APP_NAME
+FROM --platform=$BUILDPLATFORM debian:bullseye-slim AS builder
+ARG TARGETPLATFORM
+ARG BINARY_NAME
 WORKDIR /app
+COPY . .
+RUN case "$TARGETPLATFORM" in \
+      "linux/amd64") BINARY_PATH="target/release/${BINARY_NAME}" ;; \
+      "linux/arm64") BINARY_PATH="target/aarch64-unknown-linux-gnu/release/${BINARY_NAME}" ;; \
+      *) exit 1 ;; \
+    esac && \
+    mv "$BINARY_PATH" /usr/local/bin/${BINARY_NAME}
 
-# Build the application.
-# Leverage a cache mount to /usr/local/cargo/registry/
-# for downloaded dependencies and a cache mount to /app/target/ for 
-# compiled dependencies which will speed up subsequent builds.
-# Leverage a bind mount to the src directory to avoid having to copy the
-# source code into the container. Once built, copy the executable to an
-# output directory before the cache mounted /app/target is unmounted.
-RUN --mount=type=bind,source=src,target=src \
-    --mount=type=bind,source=entity,target=entity \
-    --mount=type=bind,source=migration,target=migration \
-    --mount=type=bind,source=Cargo.toml,target=Cargo.toml \
-    --mount=type=bind,source=Cargo.lock,target=Cargo.lock \
-    --mount=type=cache,target=/app/target/ \
-    --mount=type=cache,target=/usr/local/cargo/registry/ \
-    <<EOF
-set -e
-cargo build --locked --release
-cp ./target/release/$APP_NAME /bin/server
-EOF
-
-################################################################################
-# Create a new stage for running the application that contains the minimal
-# runtime dependencies for the application. This often uses a different base
-# image from the build stage where the necessary files are copied from the build
-# stage.
-#
-# The example below uses the debian bullseye image as the foundation for running the app.
-# By specifying the "bullseye-slim" tag, it will also use whatever happens to be the
-# most recent version of that tag when you build your Dockerfile. If
-# reproducability is important, consider using a digest
-# (e.g., debian@sha256:ac707220fbd7b67fc19b112cee8170b41a9e97f703f588b2cdbbcdcecdd8af57).
-FROM debian:bullseye-slim AS final
-
-RUN set -ex; \
-    apt-get update && \
-    apt-get -y install --no-install-recommends \
-        ca-certificates curl && \
-    rm -rf /var/lib/apt/lists/*
-
-# Create a non-privileged user that the app will run under.
-# See https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#user
-ARG UID=10001
-RUN adduser \
-    --disabled-password \
-    --gecos "" \
-    --home "/nonexistent" \
-    --shell "/sbin/nologin" \
-    --no-create-home \
-    --uid "${UID}" \
-    appuser
-USER appuser
-
-# Copy the executable from the "build" stage.
-COPY --from=build /bin/server /bin/
-
-# Expose the port that the application listens on.
-EXPOSE 3000
-
-HEALTHCHECK --interval=5s --timeout=3s --retries=3 \
-    CMD curl -f http://localhost:3000/health || exit 1
-
-# What the container should run when it is started.
-CMD ["/bin/server"]
+FROM --platform=$TARGETPLATFORM debian:bullseye-slim
+ARG BINARY_NAME
+COPY --from=builder /usr/local/bin/${BINARY_NAME} /usr/local/bin/
+CMD ["${BINARY_NAME}"]

entity/src/transaction.rs

@@ -11,11 +11,13 @@ pub struct Model {
     pub transaction_type: String,
     pub total_amount: Decimal,
     pub timestamp: DateTime,
-    pub title: String,
+    pub title: Option<String>,
     pub emoji: Option<String>,
     pub notes: Option<String>,
     pub receipt: Option<String>,
     pub description: Option<String>,
+    #[sea_orm(unique)]
+    pub identity_hash: Option<i64>,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]

fixtures/transactions.csv

@@ -0,0 +1,3 @@
+Transaction ID,Date,Time,Type,Name,Emoji,Category,Amount,Currency,Local amount,Local currency,Notes and #tags,Address,Receipt,Description,Category split
+tx_0000AhmcbFKVlkAFbeZuAk,11/05/2024,13:41:47,Pot transfer,Savings Pot,,Savings,-1.4,GBP,-1.4,GBP,,,,Round up,
+tx_0000AhmgdZ0FzkVZou77Ev,11/05/2024,14:27:01,Card payment,D,💊,C,-100.42,GBP,-100.42,GBP,,B,,A,"Groceries:15.00,Personal care:10.00"

fixtures/transactions.json

@@ -0,0 +1,38 @@
+[
+  [
+    "tx_0000AhmcbFKVlkAFbeZuAk",
+    "2024-05-11T00:00:00.000Z",
+    "1899-12-30T13:41:47.000Z",
+    "Pot transfer",
+    "Savings Pot",
+    "",
+    "Savings",
+    -1.4,
+    "GBP",
+    -1.4,
+    "GBP",
+    "",
+    "",
+    "",
+    "Round up",
+    ""
+  ],
+  [
+    "tx_0000AhmgdZ0FzkVZou77Ev",
+    "2024-05-11T00:00:00.000Z",
+    "1899-12-30T14:27:01.000Z",
+    "Card payment",
+    "D",
+    "💊",
+    "C",
+    -100.42,
+    "GBP",
+    -100.42,
+    "GBP",
+    "",
+    "B",
+    "",
+    "A",
+    "Groceries:15.00,Personal care:10.00"
+  ]
+]

justfile

@@ -0,0 +1,12 @@
+#!/usr/bin/env just --justfile
+
+generate-migration:
+     sea-orm-cli migrate generate $1
+
+migrate:
+    sea-orm-cli migrate up
+
+generate-entities:
+    sea-orm-cli generate entity --with-serde both \
+                                -l -o entity/src \
+                                --ignore-tables monzo_ingestion_seaql_migrations

migration/src/lib.rs

@@ -1,6 +1,8 @@
 pub use sea_orm_migration::prelude::*;
 
 pub mod m20230904_141851_create_monzo_tables;
+mod m20240529_195030_add_transaction_identity_hash;
+mod m20240603_162500_make_title_optional;
 
 pub struct Migrator;
 
@@ -11,6 +13,10 @@ impl MigratorTrait for Migrator {
     }
 
     fn migrations() -> Vec<Box<dyn MigrationTrait>> {
-        vec![Box::new(m20230904_141851_create_monzo_tables::Migration)]
+        vec![
+            Box::new(m20230904_141851_create_monzo_tables::Migration),
+            Box::new(m20240529_195030_add_transaction_identity_hash::Migration),
+            Box::new(m20240603_162500_make_title_optional::Migration),
+        ]
     }
 }

migration/src/m20240529_195030_add_transaction_identity_hash.rs

@@ -0,0 +1,39 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .alter_table(
+                TableAlterStatement::new()
+                    .table(Transaction::Table)
+                    .add_column(
+                        ColumnDef::new(Transaction::IdentityHash)
+                            .big_integer()
+                            .unique_key(),
+                    )
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .alter_table(
+                TableAlterStatement::new()
+                    .table(Transaction::Table)
+                    .drop_column(Transaction::IdentityHash)
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum Transaction {
+    Table,
+    IdentityHash,
+}

migration/src/m20240603_162500_make_title_optional.rs

@@ -0,0 +1,61 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .alter_table(
+                TableAlterStatement::new()
+                    .table(Transaction::Table)
+                    .modify_column(ColumnDef::new(Transaction::Title).string().null())
+                    .to_owned(),
+            )
+            .await?;
+
+        // Set all empty string titles to null
+        manager
+            .get_connection()
+            .execute_unprepared(
+                r#"
+            update transaction
+            set title = null
+            where title = ''
+        "#,
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        // Set all null titles to empty string when reverting
+        manager
+            .get_connection()
+            .execute_unprepared(
+                r#"
+            update transaction
+            set title = ''
+            where title is null
+        "#,
+            )
+            .await?;
+
+        manager
+            .alter_table(
+                TableAlterStatement::new()
+                    .table(Transaction::Table)
+                    .modify_column(ColumnDef::new(Transaction::Title).string().not_null())
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum Transaction {
+    Table,
+    Title,
+}

src/error.rs

@@ -6,25 +6,33 @@ use tracing::log::error;
 #[derive(thiserror::Error, Debug)]
 pub enum AppError {
     /// SeaORM error, separated for ease of use allowing us to `?` db operations.
-    #[error("Internal error")]
+    #[error("Database error: {0}")]
     DbError(#[from] DbErr),
 
     #[error("Invalid request {0}")]
     BadRequest(anyhow::Error),
 
     /// Catch all for error we don't care to expose publicly.
-    #[error("Internal error")]
+    #[error("An error occurred: {0}")]
     Anyhow(#[from] anyhow::Error),
 }
 
+impl AppError {
+    fn to_response_string(&self) -> String {
+        match self {
+            AppError::BadRequest(e) => e.to_string(),
+            _ => "Internal server error".to_string(),
+        }
+    }
+}
+
 impl IntoResponse for AppError {
     fn into_response(self) -> Response {
-        error!("Internal server error: {self:?}");
-
         let status_code = match self {
+            AppError::BadRequest(_) => StatusCode::BAD_REQUEST,
             _ => StatusCode::INTERNAL_SERVER_ERROR,
         };
 
-        (status_code, self.to_string()).into_response()
+        (status_code, self.to_response_string()).into_response()
     }
 }

src/ingestion/db.rs

@@ -1,50 +1,17 @@
 use crate::error::AppError;
+use crate::ingestion::ingestion_logic::MonzoRow;
 use anyhow::anyhow;
 use entity::{expenditure, transaction};
-use sea_orm::sea_query::{OnConflict, PostgresQueryBuilder};
-use sea_orm::{ColumnTrait, DatabaseConnection, EntityTrait, Iterable, TransactionTrait};
+use sea_orm::sea_query::OnConflict;
 use sea_orm::{
-    ConnectionTrait, DatabaseBackend, DatabaseTransaction, DbErr, QueryFilter, QueryTrait,
-    Statement,
+    ColumnTrait, DatabaseConnection, DbErr, EntityTrait, Iterable, QuerySelect, TransactionTrait,
 };
+use sea_orm::{ConnectionTrait, DatabaseTransaction, QueryFilter};
 
 pub struct Insertion {
     pub transaction: transaction::ActiveModel,
     pub contained_expenditures: Vec<expenditure::ActiveModel>,
-}
-
-async fn update_expenditures(
-    tx: &DatabaseTransaction,
-    insertions: &[Insertion],
-) -> Result<(), DbErr> {
-    // Expenditures can change as we re-categorise them, so we delete all the old ones and
-    // insert an entirely new set to ensure we don't end up leaving old ones around.
-    expenditure::Entity::delete_many()
-        .filter(
-            expenditure::Column::TransactionId
-                .is_in(insertions.iter().map(|i| i.transaction.id.as_ref())),
-        )
-        .exec(tx)
-        .await?;
-
-    expenditure::Entity::insert_many(
-        insertions
-            .iter()
-            .flat_map(|i| &i.contained_expenditures)
-            .cloned(),
-    )
-    .on_conflict(
-        OnConflict::columns(vec![
-            expenditure::Column::TransactionId,
-            expenditure::Column::Category,
-        ])
-        .update_columns(expenditure::Column::iter())
-        .to_owned(),
-    )
-    .exec(tx)
-    .await?;
-
-    Ok(())
+    pub identity_hash: i64,
 }
 
 // Note while this is more efficient in db calls, it does bind together the entire group.
@@ -52,14 +19,25 @@ async fn update_expenditures(
 // trying to move failures earlier and improve reporting.
 pub async fn insert(
     db: &DatabaseConnection,
-    insertions: Vec<Insertion>,
+    monzo_rows: Vec<MonzoRow>,
 ) -> Result<Vec<String>, AppError> {
     let mut new_transaction_ids = Vec::new();
+    let insertions = monzo_rows
+        .into_iter()
+        .map(MonzoRow::into_insertion)
+        .collect::<Result<Vec<_>, _>>()?;
 
     for insertions in insertions.chunks(400) {
+        let (new_or_updated_insertions, inserted_transaction_ids) =
+            whittle_insertions(insertions, db).await?;
+
+        if new_or_updated_insertions.is_empty() {
+            continue;
+        }
+
         let tx = db.begin().await?;
-        let inserted_transaction_ids = update_transactions(insertions, &tx).await?;
-        update_expenditures(&tx, &insertions).await?;
+        update_transactions(&tx, &new_or_updated_insertions).await?;
+        update_expenditures(&tx, &new_or_updated_insertions, &inserted_transaction_ids).await?;
         tx.commit().await?;
 
         // We wait until the transaction is committed before adding the new transaction ids to the
@@ -73,32 +51,97 @@ pub async fn insert(
     Ok(new_transaction_ids)
 }
 
-async fn update_transactions(
-    insertions: &[Insertion],
+async fn update_expenditures(
     tx: &DatabaseTransaction,
-) -> Result<Vec<String>, AppError> {
-    let insert =
-        transaction::Entity::insert_many(insertions.iter().map(|i| &i.transaction).cloned())
-            .on_conflict(
-                OnConflict::column(transaction::Column::Id)
-                    .update_columns(transaction::Column::iter())
-                    .to_owned(),
-            )
-            .into_query()
-            .returning_col(transaction::Column::Id)
-            .build(PostgresQueryBuilder);
+    new_or_updated_insertions: &[&Insertion],
+    inserted_transaction_ids: &[String],
+) -> Result<(), AppError> {
+    if new_or_updated_insertions.is_empty() {
+        return Ok(());
+    }
 
-    let inserted_transaction_ids = tx
-        .query_all(Statement::from_sql_and_values(
-            DatabaseBackend::Postgres,
-            insert.0,
-            insert.1,
-        ))
-        .await?
+    // Expenditures can change as we re-categorise them, so we delete all the old ones and
+    // insert an entirely new set to ensure we don't end up leaving old ones around.
+    expenditure::Entity::delete_many()
+        .filter(expenditure::Column::TransactionId.is_in(inserted_transaction_ids))
+        .exec(tx)
+        .await?;
+
+    expenditure::Entity::insert_many(
+        new_or_updated_insertions
+            .iter()
+            .flat_map(|i| &i.contained_expenditures)
+            .cloned(),
+    )
+        .on_conflict(
+            OnConflict::columns(vec![
+                expenditure::Column::TransactionId,
+                expenditure::Column::Category,
+            ])
+                .update_columns(expenditure::Column::iter())
+                .to_owned(),
+        )
+        .exec(tx)
+        .await?;
+    Ok(())
+}
+
+async fn update_transactions(
+    tx: &DatabaseTransaction,
+    new_or_updated_insertions: &[&Insertion],
+) -> Result<(), DbErr> {
+    if new_or_updated_insertions.is_empty() {
+        return Ok(());
+    }
+
+    let transactions = new_or_updated_insertions
         .iter()
-        .map(|r| r.try_get_by("id"))
-        .collect::<Result<Vec<String>, _>>()?;
-    Ok(inserted_transaction_ids)
+        .map(|i| &i.transaction)
+        .cloned();
+
+    transaction::Entity::insert_many(transactions)
+        .on_conflict(
+            OnConflict::column(transaction::Column::Id)
+                .update_columns(transaction::Column::iter())
+                .to_owned(),
+        )
+        .exec(tx)
+        .await?;
+    Ok(())
+}
+
+async fn whittle_insertions<'a>(
+    insertions: &'a [Insertion],
+    tx: &DatabaseConnection,
+) -> Result<(Vec<&'a Insertion>, Vec<String>), AppError> {
+    let existing_hashes = transaction::Entity::find()
+        .select_only()
+        .columns([transaction::Column::IdentityHash])
+        .filter(transaction::Column::IdentityHash.is_not_null())
+        .into_tuple::<(i64, )>()
+        .all(tx)
+        .await?;
+
+    tracing::debug!("Found existing entries: {existing_hashes:?}");
+
+    // We will only update those where the hash is different to avoid unnecessary updates and
+    // notifications.
+    let new_or_updated_insertions = insertions
+        .iter()
+        .filter(|i| {
+            let hash = i.identity_hash;
+            !existing_hashes
+                .iter()
+                .any(|(existing_hash, )| *existing_hash == hash)
+        })
+        .collect::<Vec<_>>();
+
+    let inserted_transaction_ids = new_or_updated_insertions
+        .iter()
+        .map(|i| i.transaction.id.clone().unwrap())
+        .collect::<Vec<_>>();
+
+    Ok((new_or_updated_insertions, inserted_transaction_ids))
 }
 
 async fn notify_new_transactions(
@@ -114,16 +157,28 @@ async fn notify_new_transactions(
 }
 
 mod tests {
+    use super::{insert, notify_new_transactions, update_expenditures, update_transactions};
     use anyhow::Error;
-    use sea_orm::{DatabaseConnection};
-    use sqlx::{PgPool};
-    use sqlx::postgres::PgListener;
-    use testcontainers::ContainerAsync;
+    use tokio::sync::OnceCell;
     use migration::MigratorTrait;
+    use sea_orm::{DatabaseConnection, TransactionTrait};
+    use serde_json::Value;
+    use sqlx::postgres::PgListener;
+    use sqlx::PgPool;
     use testcontainers::runners::AsyncRunner;
-    use super::notify_new_transactions;
+    use testcontainers::ContainerAsync;
+    use crate::ingestion::ingestion_logic::from_json_row;
 
-    async fn initialise() -> Result<(ContainerAsync<testcontainers_modules::postgres::Postgres>, DatabaseConnection, PgPool), Error> {
+    #[derive(Debug)]
+    struct DatabaseInstance {
+        container: ContainerAsync<testcontainers_modules::postgres::Postgres>,
+        db: DatabaseConnection,
+        pool: PgPool,
+    }
+
+    static INSTANCE: OnceCell<DatabaseInstance> = OnceCell::const_new();
+
+    async fn initialise_db() -> Result<DatabaseInstance, Error> {
         let container = testcontainers_modules::postgres::Postgres::default()
             .start()
             .await?;
@@ -137,29 +192,107 @@ mod tests {
         let db: DatabaseConnection = sea_orm::Database::connect(connection_string).await?;
         migration::Migrator::up(&db, None).await?;
 
-        let pool = PgPool::connect(connection_string)
-            .await?;
+        let pool = PgPool::connect(connection_string).await?;
+        let instance = DatabaseInstance {
+            container,
+            db,
+            pool,
+        };
 
-        Ok((container, db, pool))
+        Ok(instance)
+    }
+
+    async fn get_or_initialize_db_instance() -> Result<
+        &'static DatabaseInstance,
+        Error,
+    > {
+        Ok(INSTANCE.get_or_init(|| async {
+            initialise_db().await.unwrap()
+        }).await)
+    }
+
+    #[tokio::test]
+    async fn test_empty_insertion_list() -> Result<(), Error> {
+        let db = get_or_initialize_db_instance().await?;
+        let insertions = vec![];
+        let tx = db.db.begin().await?;
+        update_transactions(&tx, &insertions).await?;
+        update_expenditures(&tx, &insertions, &vec![]).await?;
+        tx.commit().await?;
+
+        Ok(())
     }
 
     #[tokio::test]
     async fn test_notify() -> Result<(), Error> {
-        let (_container, db, pool) = initialise().await?;
-        let mut listener = PgListener::connect_with(&pool).await?;
+        let dbi = get_or_initialize_db_instance().await?;
+        let mut listener = PgListener::connect_with(&dbi.pool).await?;
         listener.listen("monzo_new_transactions").await?;
 
-        let ids = vec!["test1".to_string(), "test2".to_string(), "test3".to_string()];
+        let ids = vec![
+            "test1".to_string(),
+            "test2".to_string(),
+            "test3".to_string(),
+        ];
 
-        notify_new_transactions(
-            &db,
-            &ids,
-        ).await?;
+        notify_new_transactions(&dbi.db, &ids).await?;
 
         let notification = listener.recv().await?;
         let payload = notification.payload();
         println!("Payload: {}", payload);
-        assert_eq!(serde_json::from_str::<Vec<String>>(&payload)?, ids, "Payloads do not match");
+        assert_eq!(
+            serde_json::from_str::<Vec<String>>(&payload)?,
+            ids,
+            "Payloads do not match"
+        );
+
+        Ok(())
+    }
+
+    #[tokio::test]
+    async fn test_notify_on_insert() -> Result<(), Error> {
+        let dbi = get_or_initialize_db_instance().await?;
+        let mut listener = PgListener::connect_with(&dbi.pool).await?;
+        listener.listen("monzo_new_transactions").await?;
+
+        let json = include_str!("../../fixtures/transactions.json");
+        let json: Vec<Vec<Value>> = serde_json::from_str(json)?;
+        let data = json
+            .iter()
+            .map(|row| from_json_row(row.clone()))
+            .collect::<Result<Vec<_>, anyhow::Error>>()
+            .unwrap();
+
+        insert(&dbi.db, data.clone()).await?;
+        let notification = listener.recv().await?;
+        let payload = notification.payload();
+        let mut payload = serde_json::from_str::<Vec<String>>(&payload)?;
+        payload.sort();
+
+        let mut ids = data.iter()
+            .map(|row| row.transaction_id.clone())
+            .collect::<Vec<_>>();
+
+        ids.sort();
+
+        assert_eq!(payload, ids, "Inserted IDs do not match");
+
+        insert(&dbi.db, data.clone()).await?;
+        let notification = listener.recv().await?;
+        let payload = notification.payload();
+        let payload = serde_json::from_str::<Vec<String>>(&payload)?;
+        assert_eq!(payload, Vec::<String>::new(), "Re-inserting identical rows triggered double notification");
+
+        let mut altered_data = data.clone();
+        altered_data[0].description = Some("New description".to_string());
+
+        assert_ne!(altered_data[0].compute_hash(), data[0].compute_hash(), "Alterations have the same hash");
+
+        insert(&dbi.db, altered_data.clone()).await?;
+        let notification = listener.recv().await?;
+        let payload = notification.payload();
+        let payload = serde_json::from_str::<Vec<String>>(&payload)?;
+        assert_eq!(payload, vec![altered_data[0].transaction_id.clone()], "Re-inserting altered row failed to re-trigger notification");
 
         Ok(())
     }

src/ingestion/flex.rs

@@ -0,0 +1,9 @@
+#[allow(dead_code)]
+mod headings {
+    #[allow(unused_imports)]
+    pub use super::super::ingestion_logic::headings::*;
+
+    // Additional FLex headings
+    pub const MONEY_OUT: usize = 16;
+    pub const MONEY_IN: usize = 17;
+}

src/ingestion/ingestion_logic.rs

@@ -1,16 +1,17 @@
 use crate::ingestion::db::Insertion;
-use anyhow::Context;
+use anyhow::{anyhow, Context};
 use chrono::{DateTime, NaiveDate, NaiveDateTime, NaiveTime};
 use csv::StringRecord;
 use entity::expenditure::ActiveModel;
 use entity::transaction;
 use num_traits::FromPrimitive;
 use sea_orm::prelude::Decimal;
-use sea_orm::ActiveValue::*;
 use sea_orm::IntoActiveModel;
+use serde_json::Value;
+use std::hash::Hash;
 
 #[allow(dead_code)]
-mod headings {
+pub(crate) mod headings {
     pub const TRANSACTION_ID: usize = 0;
     pub const DATE: usize = 1;
     pub const TIME: usize = 2;
@@ -29,41 +30,115 @@ mod headings {
     pub const CATEGORY_SPLIT: usize = 15;
 }
 
-fn parse_section(monzo_transaction_id: &str, section: &str) -> anyhow::Result<ActiveModel> {
-    let mut components = section.split(':');
-    let category: String = components
-        .next()
-        .context("Missing Missing category")?
-        .to_string();
-
-    let amount = components
-        .next()
-        .context("Missing amount")?
-        .parse::<Decimal>()?;
-
-    Ok(entity::expenditure::Model {
-        transaction_id: monzo_transaction_id.to_string(),
-        category,
-        amount,
-    }
-    .into_active_model())
+#[derive(Debug, Eq, PartialEq, Hash, Clone)]
+pub struct MonzoRow {
+    pub category_split: Option<String>,
+    pub primary_category: String,
+    pub total_amount: Decimal,
+    pub receipt: Option<String>,
+    pub notes: Option<String>,
+    pub emoji: Option<String>,
+    pub description: Option<String>,
+    pub transaction_type: String,
+    pub title: Option<String>,
+    pub timestamp: NaiveDateTime,
+    pub transaction_id: String,
 }
 
-fn json_opt(value: &serde_json::Value) -> Option<String> {
+impl MonzoRow {
+    fn parse_section(monzo_transaction_id: &str, section: &str) -> anyhow::Result<ActiveModel> {
+        let mut components = section.split(':');
+        let category: String = components
+            .next()
+            .context("Missing Missing category")?
+            .to_string();
+
+        let amount = components
+            .next()
+            .context("Missing amount")?
+            .parse::<Decimal>()?;
+
+        Ok(entity::expenditure::Model {
+            transaction_id: monzo_transaction_id.to_string(),
+            category,
+            amount,
+        }
+        .into_active_model())
+    }
+
+    /// Compute a hash of this row, returning the number as an i64 to be used as a unique constraint
+    /// in the database.
+    pub fn compute_hash(&self) -> i64 {
+        use std::collections::hash_map::DefaultHasher;
+        use std::hash::Hasher;
+
+        let mut hasher = DefaultHasher::new();
+        self.hash(&mut hasher);
+        hasher.finish() as i64
+    }
+
+    pub fn into_insertion(self) -> Result<Insertion, anyhow::Error> {
+        let identity_hash = self.compute_hash();
+
+        let expenditures: Vec<_> = match &self.category_split {
+            Some(split) if !split.is_empty() => split
+                .split(',')
+                .map(|section| Self::parse_section(&self.transaction_id, section))
+                .collect::<Result<Vec<_>, anyhow::Error>>()?,
+
+            _ => vec![entity::expenditure::Model {
+                category: self.primary_category.clone(),
+                amount: self.total_amount,
+                transaction_id: self.transaction_id.clone(),
+            }
+            .into_active_model()],
+        };
+
+        Ok(Insertion {
+            transaction: transaction::Model {
+                id: self.transaction_id,
+                transaction_type: self.transaction_type,
+                timestamp: self.timestamp,
+                title: self.title,
+                emoji: self.emoji,
+                notes: self.notes,
+                receipt: self.receipt,
+                total_amount: self.total_amount,
+                description: self.description,
+                identity_hash: Some(identity_hash),
+            }
+            .into_active_model(),
+
+            contained_expenditures: expenditures,
+            identity_hash,
+        })
+    }
+}
+
+fn json_opt(value: &Value) -> Option<String> {
     match value {
-        serde_json::Value::String(string) if string.is_empty() => None,
-        serde_json::Value::String(string) => Some(string.to_string()),
+        Value::String(string) if string.is_empty() => None,
+        Value::String(string) => Some(string.to_string()),
         _ => None,
     }
 }
 
-pub fn from_json_row(row: Vec<serde_json::Value>) -> anyhow::Result<Insertion> {
-    use serde_json::Value;
-    let monzo_transaction_id = row[headings::TRANSACTION_ID]
-        .as_str()
-        .context("No transaction id")?
-        .to_string();
+fn json_required_str(value: &Value, label: &str) -> anyhow::Result<String> {
+    match value {
+        Value::String(string) if string.is_empty() => Err(anyhow!("{} is empty", label)),
+        Value::String(string) => Ok(string.to_string()),
+        _ => Err(anyhow!("{} is not a string", label)),
+    }
+}
 
+fn parse_timestamp(date: &str, time: &str) -> anyhow::Result<NaiveDateTime> {
+    let date = NaiveDate::parse_from_str(date, "%Y-%m-%d")?;
+    let time = NaiveTime::parse_from_str(time, "%H:%M:%S")?;
+
+    Ok(date.and_time(time))
+}
+
+pub fn from_json_row(row: Vec<Value>) -> anyhow::Result<MonzoRow> {
     let date = DateTime::parse_from_rfc3339(row[headings::DATE].as_str().context("No date")?)
         .context("Failed to parse date")?;
 
@@ -73,57 +148,57 @@ pub fn from_json_row(row: Vec<serde_json::Value>) -> anyhow::Result<Insertion> {
 
     let timestamp = date.date_naive().and_time(time);
 
-    let title = row[headings::NAME]
-        .as_str()
-        .context("No title")?
-        .to_string();
-
-    let monzo_transaction_type = row[headings::TYPE]
-        .as_str()
-        .context("No transaction type")?
-        .to_string();
-
-    let description = json_opt(&row[headings::DESCRIPTION]);
-    let emoji = json_opt(&row[headings::EMOJI]);
-    let notes = json_opt(&row[headings::NOTES_AND_TAGS]);
-    let receipt = json_opt(&row[headings::RECEIPT]);
     let total_amount = Decimal::from_f64(row[headings::AMOUNT].as_f64().context("No amount")?)
         .context("Failed to parse date")?;
 
-    let expenditures: Vec<_> = match row.get(headings::CATEGORY_SPLIT) {
-        Some(Value::String(split)) if !split.is_empty() => split
-            .split(',')
-            .map(|section| parse_section(&monzo_transaction_id, section))
-            .collect::<Result<Vec<_>, anyhow::Error>>()?,
-
-        _ => vec![entity::expenditure::Model {
-            category: row[headings::CATEGORY]
-                .as_str()
-                .context("No context")?
-                .to_string(),
-            amount: total_amount,
-            transaction_id: monzo_transaction_id.clone(),
-        }
-        .into_active_model()],
-    };
-
-    Ok(Insertion {
-        transaction: transaction::ActiveModel {
-            id: Set(monzo_transaction_id),
-            transaction_type: Set(monzo_transaction_type),
-            timestamp: Set(timestamp),
-            title: Set(title),
-            emoji: Set(emoji),
-            notes: Set(notes),
-            receipt: Set(receipt),
-            total_amount: Set(total_amount),
-            description: Set(description),
-        },
-
-        contained_expenditures: expenditures,
+    Ok(MonzoRow {
+        transaction_id: json_required_str(&row[headings::TRANSACTION_ID], "Transaction ID")?,
+        title: json_opt(&row[headings::NAME]),
+        transaction_type: json_required_str(&row[headings::TYPE], "Transaction type")?,
+        description: json_opt(&row[headings::DESCRIPTION]),
+        emoji: json_opt(&row[headings::EMOJI]),
+        notes: json_opt(&row[headings::NOTES_AND_TAGS]),
+        receipt: json_opt(&row[headings::RECEIPT]),
+        primary_category: json_required_str(&row[headings::CATEGORY], "Primary Category")?,
+        category_split: json_opt(&row[headings::CATEGORY_SPLIT]),
+        total_amount,
+        timestamp,
     })
 }
 
+#[test]
+fn test_json() {
+    let json = include_str!("../../fixtures/transactions.json");
+    let csv = include_str!("../../fixtures/transactions.csv");
+
+    let json: Vec<Vec<Value>> = serde_json::from_str(json).unwrap();
+    let mut csv_reader = csv::Reader::from_reader(csv.as_bytes());
+
+    let json_rows = json
+        .iter()
+        .map(|row| from_json_row(row.clone()))
+        .collect::<Result<Vec<_>, anyhow::Error>>()
+        .unwrap();
+
+    let csv_rows = csv_reader
+        .records()
+        .map(|record| from_csv_row(record.unwrap()))
+        .collect::<Result<Vec<_>, anyhow::Error>>()
+        .unwrap();
+
+    assert_eq!(csv_rows.len(), json_rows.len(), "Different number of rows");
+
+    for (i, (json_row, csv_row)) in json_rows.iter().zip(csv_rows.iter()).enumerate() {
+        assert_eq!(json_row, csv_row, "Row {} is different", i);
+        assert_eq!(
+            json_row.compute_hash(),
+            csv_row.compute_hash(),
+            "Row {} hash are different",
+            i
+        );
+    }
+}
+
 fn csv_opt(s: &str) -> Option<String> {
     match s {
         "" => None,
@@ -131,9 +206,7 @@ fn csv_opt(s: &str) -> Option<String> {
     }
 }
 
-pub fn from_csv_row(row: StringRecord) -> anyhow::Result<Insertion> {
-    let monzo_transaction_id = row[headings::TRANSACTION_ID].to_string();
-
+pub fn from_csv_row(row: StringRecord) -> anyhow::Result<MonzoRow> {
     let date = NaiveDate::parse_from_str(&row[headings::DATE], "%d/%m/%Y")
         .context("Failed to parse date from csv")?;
 
@@ -142,41 +215,17 @@ pub fn from_csv_row(row: StringRecord) -> anyhow::Result<Insertion> {
 
     let timestamp = NaiveDateTime::new(date, time);
 
-    let title = row[headings::NAME].to_string();
-    let monzo_transaction_type = row[headings::TYPE].to_string();
-
-    let description = csv_opt(&row[headings::DESCRIPTION]);
-    let emoji = csv_opt(&row[headings::EMOJI]);
-    let notes = csv_opt(&row[headings::NOTES_AND_TAGS]);
-    let receipt = csv_opt(&row[headings::RECEIPT]);
-    let total_amount = row[headings::AMOUNT].parse::<Decimal>()?;
-
-    let expenditures: Vec<_> = match row.get(headings::CATEGORY_SPLIT) {
-        Some(split) if !split.is_empty() => split
-            .split(',')
-            .map(|section| parse_section(&monzo_transaction_id, section))
-            .collect::<Result<Vec<_>, anyhow::Error>>()?,
-
-        _ => vec![entity::expenditure::Model {
-            transaction_id: monzo_transaction_id.clone(),
-            category: row[headings::CATEGORY].to_string(),
-            amount: total_amount,
-        }
-        .into_active_model()],
-    };
-
-    Ok(Insertion {
-        transaction: transaction::ActiveModel {
-            id: Set(monzo_transaction_id),
-            transaction_type: Set(monzo_transaction_type),
-            timestamp: Set(timestamp),
-            title: Set(title),
-            emoji: Set(emoji),
-            notes: Set(notes),
-            receipt: Set(receipt),
-            total_amount: Set(total_amount),
-            description: Set(description),
-        },
-        contained_expenditures: expenditures,
+    Ok(MonzoRow {
+        timestamp,
+        transaction_id: row[headings::TRANSACTION_ID].to_string(),
+        title: csv_opt(&row[headings::NAME]),
+        transaction_type: row[headings::TYPE].to_string(),
+        description: csv_opt(&row[headings::DESCRIPTION]),
+        emoji: csv_opt(&row[headings::EMOJI]),
+        notes: csv_opt(&row[headings::NOTES_AND_TAGS]),
+        receipt: csv_opt(&row[headings::RECEIPT]),
+        total_amount: row[headings::AMOUNT].parse::<Decimal>()?,
+        category_split: csv_opt(&row[headings::CATEGORY_SPLIT]),
+        primary_category: row[headings::CATEGORY].to_string(),
     })
 }

src/ingestion/mod.rs

@@ -1,3 +1,4 @@
 pub mod db;
 pub mod ingestion_logic;
+pub mod flex;
 pub mod routes;

src/ingestion/routes.rs

@@ -2,43 +2,33 @@ use crate::error::AppError;
 use crate::ingestion::db;
 use crate::ingestion::ingestion_logic::{from_csv_row, from_json_row};
 use anyhow::anyhow;
+use axum::extract::multipart::MultipartError;
 use axum::extract::{Extension, Json, Multipart};
+use bytes::Bytes;
 use sea_orm::DatabaseConnection;
 use serde_json::Value;
 use std::io::Cursor;
 
-pub async fn monzo_updated(
-    Extension(db): Extension<DatabaseConnection>,
-    Json(row): Json<Vec<Value>>,
-) -> Result<&'static str, AppError> {
-    db::insert(&db, vec![from_json_row(row)?]).await.unwrap();
-
-    Ok("Ok")
-}
-
 pub async fn monzo_batched_json(
     Extension(db): Extension<DatabaseConnection>,
     Json(data): Json<Vec<Vec<Value>>>,
 ) -> Result<&'static str, AppError> {
-    let insertions = data
+    let data = data
         .into_iter()
-        .skip(1)
-        .map(|row| from_json_row(row))
+        .skip(1) // Skip the header row.
+        .map(from_json_row)
         .collect::<Result<_, _>>()?;
 
-    db::insert(&db, insertions).await.unwrap();
+    db::insert(&db, data).await?;
 
     Ok("Ok")
 }
 
-pub async fn monzo_batched_csv(
-    Extension(db): Extension<DatabaseConnection>,
-    mut multipart: Multipart,
-) -> Result<&'static str, AppError> {
+async fn extract_csv(mut multipart: Multipart) -> Result<Option<Bytes>, MultipartError> {
     let csv = loop {
-        match multipart.next_field().await.unwrap() {
+        match multipart.next_field().await? {
             Some(field) if field.name() == Some("csv") => {
-                break Some(field.bytes().await.unwrap());
+                break Some(field.bytes().await?);
             }
 
             Some(_) => {}
@@ -46,22 +36,29 @@ pub async fn monzo_batched_csv(
         }
     };
 
-    let Some(csv) = csv else {
-        return Err(AppError::BadRequest(anyhow!("No CSV file provided")));
-    };
+    Ok(csv)
+}
+
+pub async fn monzo_batched_csv(
+    Extension(db): Extension<DatabaseConnection>,
+    multipart: Multipart,
+) -> Result<&'static str, AppError> {
+    static CSV_MISSING_ERR_MSG: &str = "No CSV file provided. Expected a multipart request with a `csv` field containing the contents of the CSV.";
+
+    let csv = extract_csv(multipart)
+        .await
+        .map_err(|e| AppError::BadRequest(anyhow!(e)))
+        .and_then(|csv| csv.ok_or(AppError::BadRequest(anyhow!(CSV_MISSING_ERR_MSG))))?;
 
     let csv = Cursor::new(csv);
     let mut csv = csv::Reader::from_reader(csv);
     let data = csv.records();
+    let data = data
+        .filter_map(|f| f.ok())
+        .map(from_csv_row)
+        .collect::<Result<_, _>>()?;
 
-    db::insert(
-        &db,
-        data.filter_map(|f| f.ok())
-            .map(from_csv_row)
-            .collect::<Result<_, _>>()?,
-    )
-    .await
-    .unwrap();
+    db::insert(&db, data).await?;
 
     Ok("Ok")
 }

src/main.rs

@@ -2,29 +2,70 @@ mod error;
 mod ingestion;
 
 use crate::error::AppError;
-use crate::ingestion::routes::{monzo_batched_csv, monzo_batched_json, monzo_updated};
+use crate::ingestion::db;
+use crate::ingestion::ingestion_logic::from_csv_row;
+use crate::ingestion::routes::{monzo_batched_csv, monzo_batched_json};
 use axum::routing::{get, post};
 use axum::{Extension, Router};
-use clap::Parser;
+use clap::{Parser, Subcommand};
 use migration::{Migrator, MigratorTrait};
 use sea_orm::{ConnectionTrait, DatabaseConnection};
+use std::fs::File;
 use std::net::SocketAddr;
+use std::path::PathBuf;
 use tower_http::trace::TraceLayer;
 use tracing::log::LevelFilter;
 
+use opentelemetry::trace::TracerProvider as _;
+use opentelemetry_sdk::trace::TracerProvider;
+use opentelemetry_otlp;
+use tracing::{error, span};
+use tracing_subscriber::layer::SubscriberExt;
+use tracing_subscriber::Registry;
+use tracin_support::init_tracing_subscriber;
+
+mod tracin_support;
+
+#[derive(Debug, Subcommand)]
+enum Commands {
+    /// Manually run database migrations.
+    Migrate {
+        /// Number of migration steps to perform. If not provided, all migrations will be run.
+        #[arg(long)]
+        steps: Option<u32>,
+
+        /// If we should perform migration down.
+        #[arg(long)]
+        down: bool,
+    },
+
+    /// Start web app for to the google-sheets app script
+    Serve {
+        /// If we should perform migration at startup.
+        #[clap(short, long, env, default_value_t = true)]
+        migrate: bool,
+
+        /// The server address to bind to.
+        #[clap(short, long, env, default_value = "0.0.0.0:3000")]
+        addr: SocketAddr,
+    },
+
+    /// Ingest a google-sheets CSV export into the database.
+    Csv {
+        /// The path of the CSV file to ingest.
+        csv_file: PathBuf,
+    },
+}
+
+/// Ingest and manage monzo transactions from the Monzo Plus auto-export feature
 #[derive(Debug, clap::Parser)]
-struct Config {
-    /// If we should perform migration on startup.
-    #[clap(short, long, env, default_value_t = true)]
-    migrate: bool,
-
-    /// The server address to bind to.
-    #[clap(short, long, env, default_value = "0.0.0.0:3000")]
-    addr: SocketAddr,
-
+struct Cli {
     /// URL to PostgreSQL database.
     #[clap(short, long = "db", env)]
     database_url: String,
+
+    #[command(subcommand)]
+    command: Commands,
 }
 
 async fn health_check(
@@ -37,29 +78,58 @@ async fn health_check(
 
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
-    let config: Config = Config::parse();
-    let connection = sea_orm::ConnectOptions::new(&config.database_url)
+    let _guard = init_tracing_subscriber();
+
+    let cli: Cli = Cli::parse();
+    let connection = sea_orm::ConnectOptions::new(&cli.database_url)
         .sqlx_logging_level(LevelFilter::Debug)
         .to_owned();
 
     let connection = sea_orm::Database::connect(connection).await?;
 
-    if config.migrate {
-        Migrator::up(&connection, None).await?;
+    match cli.command {
+        Commands::Migrate { steps, down } => {
+            if down {
+                Migrator::down(&connection, steps).await?;
+            } else {
+                Migrator::up(&connection, steps).await?
+            }
+        }
+
+        Commands::Serve { migrate, addr } => {
+            if migrate {
+                Migrator::up(&connection, None).await?;
+            }
+
+            serve_web(addr, connection).await?;
+        }
+
+        Commands::Csv { csv_file } => {
+            let mut csv = csv::Reader::from_reader(File::open(csv_file)?);
+            let data = csv.records();
+            let data = data
+                .filter_map(|f| f.ok())
+                .map(from_csv_row)
+                .collect::<Result<_, _>>()?;
+
+            db::insert(&connection, data).await?;
+        }
     }
 
-    tracing_subscriber::fmt::init();
+    Ok(())
+}
+
+async fn serve_web(address: SocketAddr, connection: DatabaseConnection) -> anyhow::Result<()> {
     let app = Router::new()
         .route("/health", get(health_check))
-        .route("/monzo-updated", post(monzo_updated))
         .route("/monzo-batch-export", post(monzo_batched_json))
         .route("/monzo-csv-ingestion", post(monzo_batched_csv))
         .layer(Extension(connection.clone()))
         .layer(TraceLayer::new_for_http());
 
-    tracing::debug!("listening on {}", &config.addr);
-    let listener = tokio::net::TcpListener::bind(&config.addr).await.unwrap();
-    axum::serve(listener, app).await.unwrap();
+    tracing::info!("listening on {}", &address);
+    let listener = tokio::net::TcpListener::bind(&address).await?;
+    axum::serve(listener, app).await?;
 
     Ok(())
 }

src/tracin_support.rs

@@ -0,0 +1,108 @@
+use opentelemetry::{global, trace::TracerProvider, Key, KeyValue};
+use opentelemetry_sdk::{
+    metrics::{
+        reader::{DefaultAggregationSelector, DefaultTemporalitySelector},
+        Aggregation, Instrument, MeterProviderBuilder, PeriodicReader, SdkMeterProvider, Stream,
+    },
+    runtime,
+    trace::{BatchConfig, RandomIdGenerator, Sampler, Tracer},
+    Resource,
+};
+use opentelemetry_semantic_conventions::{
+    resource::{DEPLOYMENT_ENVIRONMENT, SERVICE_NAME, SERVICE_VERSION},
+    SCHEMA_URL,
+};
+use tracing::Level;
+use tracing_opentelemetry::{MetricsLayer, OpenTelemetryLayer};
+use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
+
+// Create a Resource that captures information about the entity for which telemetry is recorded.
+fn resource() -> Resource {
+    Resource::from_schema_url(
+        [
+            KeyValue::new(SERVICE_NAME, env!("CARGO_PKG_NAME")),
+            KeyValue::new(SERVICE_VERSION, env!("CARGO_PKG_VERSION")),
+            KeyValue::new(DEPLOYMENT_ENVIRONMENT, "develop"),
+        ],
+        SCHEMA_URL,
+    )
+}
+
+// Construct MeterProvider for MetricsLayer
+fn init_meter_provider() -> SdkMeterProvider {
+    let exporter = opentelemetry_otlp::new_exporter()
+        .http()
+        .with_http_client(reqwest::Client::new())
+        .build_metrics_exporter(
+            Box::new(DefaultAggregationSelector::new()),
+            Box::new(DefaultTemporalitySelector::new()),
+        )
+        .unwrap();
+
+    let reader = PeriodicReader::builder(exporter, runtime::Tokio)
+        .with_interval(std::time::Duration::from_secs(30))
+        .build();
+
+    let meter_provider = MeterProviderBuilder::default()
+        .with_resource(resource())
+        .with_reader(reader)
+        .build();
+
+    global::set_meter_provider(meter_provider.clone());
+
+    meter_provider
+}
+
+// Construct Tracer for OpenTelemetryLayer
+fn init_tracer() -> Tracer {
+    let provider = opentelemetry_otlp::new_pipeline()
+        .tracing()
+        .with_trace_config(
+            opentelemetry_sdk::trace::Config::default()
+                // Customize sampling strategy
+                .with_sampler(Sampler::ParentBased(Box::new(Sampler::TraceIdRatioBased(
+                    1.0,
+                ))))
+                // If export trace to AWS X-Ray, you can use XrayIdGenerator
+                .with_id_generator(RandomIdGenerator::default())
+                .with_resource(resource()),
+        )
+        .with_batch_config(BatchConfig::default())
+        .with_exporter(opentelemetry_otlp::new_exporter().tonic())
+        .install_batch(runtime::Tokio)
+        .unwrap();
+
+    global::set_tracer_provider(provider.clone());
+    provider.tracer("tracing-otel-subscriber")
+}
+
+// Initialize tracing-subscriber and return OtelGuard for opentelemetry-related termination processing
+pub(crate) fn init_tracing_subscriber() -> OtelGuard {
+    let meter_provider = init_meter_provider();
+    let tracer = init_tracer();
+
+    tracing_subscriber::registry()
+        .with(tracing_subscriber::filter::LevelFilter::from_level(
+            Level::DEBUG,
+        ))
+        .with(tracing_subscriber::fmt::layer())
+        .with(MetricsLayer::new(meter_provider.clone()))
+        .with(OpenTelemetryLayer::new(tracer))
+        .init();
+
+    OtelGuard { meter_provider }
+}
+
+pub(crate) struct OtelGuard {
+    meter_provider: SdkMeterProvider,
+}
+
+impl Drop for OtelGuard {
+    fn drop(&mut self) {
+        if let Err(err) = self.meter_provider.shutdown() {
+            eprintln!("{err:?}");
+        }
+
+        global::shutdown_tracer_provider();
+    }
+}