feat(*)!: add wire transfer process manager

Signed-off-by: Brooks Townsend <[email protected]>

Justfile

@@ -10,9 +10,10 @@ build:
         (cd $dir && wash build); \
     done
 
-version := "0.2.0"
+version := "0.3.0"
 push:
     # Push to GHCR
+    wash push ghcr.io/cosmonic/cosmonic-gitops/wiretransfer_processmanager:{{version}} process_manager/build/wiretransfer_processmanager_s.wasm
     wash push ghcr.io/cosmonic/cosmonic-gitops/bankaccount_projector:{{version}} projector/build/bankaccount_projector_s.wasm
     wash push ghcr.io/cosmonic/cosmonic-gitops/bankaccount_aggregate:{{version}} aggregate/build/bankaccount_aggregate_s.wasm
     wash push ghcr.io/cosmonic/cosmonic-gitops/bankaccount_catalog:{{version}} eventcatalog/actor/build/bankaccountcatalog_s.wasm

aggregate/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bankaccount-aggregate"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Cosmonic Team"]
 edition = "2021"
 

aggregate/src/commands.rs

@@ -1,5 +1,102 @@
 use crate::*;
 
+pub(crate) fn handle_reserve_funds(
+    input: ReserveFunds,
+    state: Option<BankAccountAggregateState>,
+) -> Result<EventList> {
+    let Some(old_state) = state else {
+        return Err(anyhow::anyhow!(
+            "Rejected command to reserve funds. Account {} does not exist.",
+            input.account_number
+        ));
+    };
+    let avail_balance = old_state.available_balance();
+    if input.amount as u32 > avail_balance {
+        error!(
+            "Rejecting command to reserve funds, account {} does not have sufficient funds. Available {}",
+            &input.account_number, avail_balance
+        );
+        Ok(vec![])
+    } else {
+        Ok(vec![Event::new(
+            FundsReserved::TYPE,
+            STREAM,
+            &FundsReserved {
+                account_number: input.account_number.to_string(),
+                wire_transfer_id: input.wire_transfer_id,
+                customer_id: old_state.customer_id.to_string(),
+                amount: input.amount,
+            },
+        )])
+    }
+}
+
+pub(crate) fn handle_release_funds(
+    input: ReleaseFunds,
+    state: Option<BankAccountAggregateState>,
+) -> Result<EventList> {
+    let Some(old_state) = state else {
+        return Err(anyhow::anyhow!(
+            "Rejected command to release funds. Account {} does not exist.",
+            input.account_number
+        ));
+    };
+
+    if old_state
+        .reserved_funds
+        .contains_key(&input.wire_transfer_id)
+    {
+        Ok(vec![Event::new(
+            FundsReleased::TYPE,
+            STREAM,
+            &FundsReleased {
+                customer_id: input.customer_id,
+                account_number: input.account_number.to_string(),
+                wire_transfer_id: input.wire_transfer_id.to_string(),
+            },
+        )])
+    } else {
+        error!(
+                "Rejecting command to release funds, account {} does not have a wire transfer hold for {}",
+                &input.account_number, input.wire_transfer_id
+            );
+        Ok(vec![])
+    }
+}
+
+pub(crate) fn handle_commit_funds(
+    input: CommitFunds,
+    state: Option<BankAccountAggregateState>,
+) -> Result<EventList> {
+    let Some(old_state) = state else {
+        return Err(anyhow::anyhow!(
+            "Rejected command to commit funds. Account {} does not exist.",
+            input.account_number
+        ));
+    };
+
+    if old_state
+        .reserved_funds
+        .contains_key(&input.wire_transfer_id)
+    {
+        Ok(vec![Event::new(
+            FundsCommitted::TYPE,
+            STREAM,
+            &FundsCommitted {
+                customer_id: input.customer_id,
+                account_number: input.account_number.to_string(),
+                wire_transfer_id: input.wire_transfer_id.to_string(),
+            },
+        )])
+    } else {
+        error!(
+                "Rejecting command to commit funds, account {} does not have a wire transfer hold for {}",
+                &input.account_number, input.wire_transfer_id
+            );
+        Ok(vec![])
+    }
+}
+
 pub(crate) fn handle_create_account(input: CreateAccount) -> Result<EventList> {
     Ok(vec![Event::new(
         AccountCreated::TYPE,
@@ -44,6 +141,40 @@ pub(crate) fn handle_withdraw_funds(
     }
 }
 
+pub(crate) fn handle_wire_funds(
+    input: WireFunds,
+    state: Option<BankAccountAggregateState>,
+) -> Result<EventList> {
+    let Some(state) = state else {
+        return Err(anyhow::anyhow!(
+            "Rejected command to wire funds. Account {} does not exist.",
+            input.account_number
+        ));
+    };
+
+    if state.available_balance() < input.amount as u32 {
+        error!(
+                "Rejecting command to wire funds, account {} does not have sufficient funds. Available {}",
+                &input.account_number, state.available_balance()
+            );
+        Ok(vec![])
+    } else {
+        Ok(vec![Event::new(
+            WireTransferInitiated::TYPE,
+            STREAM,
+            &WireTransferInitiated {
+                note: input.note,
+                account_number: input.target_account_number,
+                target_routing_number: input.target_routing_number,
+                target_account_number: input.account_number,
+                amount: input.amount,
+                customer_id: input.customer_id,
+                wire_transfer_id: input.wire_transaction_id,
+            },
+        )])
+    }
+}
+
 pub(crate) fn handle_deposit_funds(
     input: DepositFunds,
     state: Option<BankAccountAggregateState>,

aggregate/src/events.rs

@@ -37,6 +37,60 @@ pub(crate) fn apply_funds_deposited(
     Ok(StateAck::ok(Some(state)))
 }
 
+pub(crate) fn apply_funds_released(
+    input: FundsReleased,
+    state: Option<BankAccountAggregateState>,
+) -> Result<StateAck> {
+    let Some(state) = state else {
+        error!(
+            "Rejecting funds released event. Account {} does not exist.",
+            input.account_number
+        );
+        return Ok(StateAck::error(
+            "Account does not exist",
+            None::<BankAccountAggregateState>,
+        ));
+    };
+    let state = state.release_funds(&input.wire_transfer_id);
+    Ok(StateAck::ok(Some(state)))
+}
+
+pub(crate) fn apply_funds_committed(
+    input: FundsCommitted,
+    state: Option<BankAccountAggregateState>,
+) -> Result<StateAck> {
+    let Some(state) = state else {
+        error!(
+            "Rejecting funds committed event. Account {} does not exist.",
+            input.account_number
+        );
+        return Ok(StateAck::error(
+            "Account does not exist",
+            None::<BankAccountAggregateState>,
+        ));
+    };
+    let state = state.commit_funds(&input.wire_transfer_id);
+    Ok(StateAck::ok(Some(state)))
+}
+
+pub(crate) fn apply_funds_reserved(
+    input: FundsReserved,
+    state: Option<BankAccountAggregateState>,
+) -> Result<StateAck> {
+    let Some(state) = state else {
+        error!(
+            "Rejecting funds reserved event. Account {} does not exist.",
+            input.account_number
+        );
+        return Ok(StateAck::error(
+            "Account does not exist",
+            None::<BankAccountAggregateState>,
+        ));
+    };
+    let state = state.reserve_funds(&input.wire_transfer_id, input.amount as u32);
+    Ok(StateAck::ok(Some(state)))
+}
+
 pub(crate) fn apply_funds_withdrawn(
     input: FundsWithdrawn,
     state: Option<BankAccountAggregateState>,
@@ -54,3 +108,12 @@ pub(crate) fn apply_funds_withdrawn(
     let state = state.withdraw(input.amount as u32);
     Ok(StateAck::ok(Some(state)))
 }
+
+pub(crate) fn apply_wire_transfer_initiated(
+    _input: WireTransferInitiated,
+    state: Option<BankAccountAggregateState>,
+) -> Result<StateAck> {
+    // We don't currently change internal state because of this. The first time a wire transfer
+    // impacts the the account is when funds are reserved (by the process manager)
+    Ok(StateAck::ok(state))
+}

aggregate/src/lib.rs

@@ -18,6 +18,30 @@ concordance_gen::generate!({
 
 impl BankAccountAggregate for BankAccountAggregateImpl {
     // -- Commands --
+    fn handle_reserve_funds(
+        &self,
+        input: ReserveFunds,
+        state: Option<BankAccountAggregateState>,
+    ) -> anyhow::Result<EventList> {
+        commands::handle_reserve_funds(input, state)
+    }
+
+    fn handle_release_funds(
+        &self,
+        input: ReleaseFunds,
+        state: Option<BankAccountAggregateState>,
+    ) -> anyhow::Result<EventList> {
+        commands::handle_release_funds(input, state)
+    }
+
+    fn handle_commit_funds(
+        &self,
+        input: CommitFunds,
+        state: Option<BankAccountAggregateState>,
+    ) -> anyhow::Result<EventList> {
+        commands::handle_commit_funds(input, state)
+    }
+
     fn handle_create_account(
         &self,
         input: CreateAccount,
@@ -34,6 +58,14 @@ impl BankAccountAggregate for BankAccountAggregateImpl {
         commands::handle_withdraw_funds(input, state)
     }
 
+    fn handle_wire_funds(
+        &self,
+        input: WireFunds,
+        state: Option<BankAccountAggregateState>,
+    ) -> anyhow::Result<EventList> {
+        commands::handle_wire_funds(input, state)
+    }
+
     fn handle_deposit_funds(
         &self,
         input: DepositFunds,
@@ -60,13 +92,45 @@ impl BankAccountAggregate for BankAccountAggregateImpl {
         events::apply_funds_deposited(input, state)
     }
 
+    fn apply_funds_released(
+        &self,
+        input: FundsReleased,
+        state: Option<BankAccountAggregateState>,
+    ) -> anyhow::Result<StateAck> {
+        events::apply_funds_released(input, state)
+    }
+
+    fn apply_funds_committed(
+        &self,
+        input: FundsCommitted,
+        state: Option<BankAccountAggregateState>,
+    ) -> anyhow::Result<StateAck> {
+        events::apply_funds_committed(input, state)
+    }
+
+    fn apply_funds_reserved(
+        &self,
+        input: FundsReserved,
+        state: Option<BankAccountAggregateState>,
+    ) -> anyhow::Result<StateAck> {
+        events::apply_funds_reserved(input, state)
+    }
+
     fn apply_funds_withdrawn(
         &self,
         input: FundsWithdrawn,
         state: Option<BankAccountAggregateState>,
     ) -> anyhow::Result<StateAck> {
         events::apply_funds_withdrawn(input, state)
     }
+
+    fn apply_wire_transfer_initiated(
+        &self,
+        input: WireTransferInitiated,
+        state: Option<BankAccountAggregateState>,
+    ) -> anyhow::Result<StateAck> {
+        events::apply_wire_transfer_initiated(input, state)
+    }
 }
 
 const STREAM: &str = "bankaccount";

eventcatalog/actor/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bankaccountcatalog"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Cosmonic Team"]
 edition = "2021"
 

eventcatalog/events/CommitFunds/index.md

@@ -0,0 +1,19 @@
+---
+name: CommitFunds
+summary: "A request to commit funds under hold to a wire transfer"
+version: 0.0.1
+consumers:
+    - 'Bank Account Aggregate'
+producers:
+    - 'Wire Transfer Process Manager'    
+tags:
+    - label: 'command'
+externalLinks: []
+badges: []
+---
+A request to commit the funds currently on hold for a given wire transfer.
+
+<Mermaid />
+
+## Schema
+<SchemaViewer />

eventcatalog/events/CommitFunds/schema.json

@@ -0,0 +1,22 @@
+{
+    "$id": "https://cosmonic.com/concordance/bankaccount/CommitFunds.json",
+    "$schema": "https://json-schema.org/draft/2020-12/schema",
+    "title": "CommitFunds",
+    "type": "object",
+    "properties": {
+      "accountNumber": {
+        "type": "string",
+        "description": "The account number"
+      },         
+      "customerId": {
+        "type": "string",
+        "description": "The ID of the customer performing the withdrawal"
+      },
+      "wireTransferId": {
+        "type": "string",
+        "description": "A unique ID identifying the wire transfer transaction"
+      }
+    },
+    "required": ["accountNumber", "customerId", "wireTransferId"]
+  }
+