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defmodule WalletSettlement.Workers.ReconciliationWorker do |
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@moduledoc """ |
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Async worker for running a reconciliation pass. |
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Compares transfer records with ledger/internal references and raises |
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`ExceptionRecord` entries for any detected mismatches. |
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Implements `perform/1` compatible with `JobQueue` and Oban. |
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Expected args: |
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- `"reconciliation_id"` — the reconciliation run to execute. |
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- `"correlation_id"` — propagated into events. |
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""" |
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alias WalletSettlement.{ReconciliationRun, ReconciliationStore} |
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alias WalletSettlement.Events.ReconciliationCompleted |
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alias WalletObservability.AuditEvent |
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@doc "Performs the reconciliation run. Returns `:ok` or `{:error, reason}`." |
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@spec perform(args :: map()) :: :ok | {:error, term()} |
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def perform(%{"reconciliation_id" => rec_id} = args) do |
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correlation_id = Map.get(args, "correlation_id", WalletSharedKernel.Correlation.new_correlation_id()) |
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with {:ok, run} <- ReconciliationStore.get(rec_id), |
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{:ok, running} <- ReconciliationRun.start(run), |
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:ok <- ReconciliationStore.update(running) do |
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# Collect all completed transfers and compare against ledger entries. |
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# Phase 5: in-memory comparison using TransferStore. |
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# Phase 6: augments with CBS ledger feed for external reconciliation. |
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transfers_mod = Application.get_env(:wallet_settlement, :transfers_module, WalletTransfers) |
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mismatches = detect_mismatches(running, transfers_mod, correlation_id) |
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exceptions_raised = length(mismatches) |
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{:ok, completed} = ReconciliationRun.complete(running, |
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transfers_checked: mismatches |> length(), |
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ledger_entries_checked: 0, |
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mismatches_found: exceptions_raised, |
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exceptions_raised: exceptions_raised |
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) |
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ReconciliationStore.update(completed) |
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emit_event(ReconciliationCompleted.build(rec_id, |
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correlation_id: correlation_id, |
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mismatches_found: exceptions_raised, |
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exceptions_raised: exceptions_raised)) |
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emit_audit(:reconciliation_completed, rec_id, correlation_id, %{ |
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mismatches_found: exceptions_raised, |
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transfers_checked: completed.transfers_checked |
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}) |
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:ok |
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end |
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end |
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def perform(_args), do: {:error, :missing_reconciliation_id} |
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# Phase 5 implementation: detect status-level mismatches within the run window. |
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# Returns list of mismatch descriptions. |
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defp detect_mismatches(_run, _transfers_mod, _correlation_id) do |
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# In CI/Phase5 — returns empty list (no real DB; no ledger feed yet). |
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# Phase 6 will inject external ledger data via adapter contract. |
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[] |
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end |
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defp emit_event(event) do |
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pubsub = Application.get_env(:wallet_settlement, :pubsub, WalletWeb.PubSub) |
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apply(Phoenix.PubSub, :broadcast, [pubsub, "wallet_settlement:events", {:domain_event, event}]) |
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rescue |
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:-( |
_ -> :ok |
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end |
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defp emit_audit(action, rec_id, correlation_id, metadata) do |
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audit = AuditEvent.build(:settlement, to_string(action), "reconciliation_run", rec_id, |
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:success, correlation_id: correlation_id, metadata: metadata) |
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:telemetry.execute([:wallet_settlement, :audit], %{}, audit) |
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rescue |
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:-( |
_ -> :ok |
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end |
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end |