Ilia Denisov
ce8b5026c1
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Stand up the payments data foundation: a self-contained `payments` Postgres schema for the in-game currency, wallets, benefits, catalog, orders and the append-only operations ledger, behind a domain package — nothing wired to real money yet. - Migration 00010: the `payments` schema and a NOLOGIN confinement role (ALL on payments.*, nothing on backend); the ledger with a BEFORE UPDATE/DELETE append-only trigger and a partial idempotency index; the materialised balances/benefits; the catalog (atoms seeded) + products + per-method prices; the typed single-row config; orders and payment_events. There is no cross-schema foreign key — account_id is a plain uuid kept consistent in code, which keeps the domain extractable. Expand-contract and reversible. - Money is a bigint in the currency's minor units carried by a `Money` value type (exact, math/big): no float ever touches an amount, and a whole-unit currency cannot hold a fraction. - Extend jetgen to generate the payments schema; construct the service in the composition root behind a narrow interface with a boot reachability check. - Tests: integration (role confinement via SET ROLE, the append-only trigger, CHECK constraints, the idempotency index, and a forward+backward migration), Money unit tests, and an import-boundary test keeping the payments jet code private to the domain. - Docs: PLAN.md, docs/PAYMENTS.md (+ _ru mirror) updated to the built model.
38 lines
1.0 KiB
Go
38 lines
1.0 KiB
Go
package payments
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import (
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"context"
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"database/sql"
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"fmt"
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"github.com/go-jet/jet/v2/postgres"
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"scrabble/backend/internal/postgres/jet/payments/model"
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"scrabble/backend/internal/postgres/jet/payments/table"
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)
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// Store is the Postgres-backed query surface for the payments schema. It is the
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// only place in the backend that issues SQL against payments.* (an
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// import-boundary test enforces it), so the domain stays extractable into its
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// own database.
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type Store struct {
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db *sql.DB
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}
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// NewStore constructs a Store wrapping db.
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func NewStore(db *sql.DB) *Store { return &Store{db: db} }
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// Ping verifies the payments schema is reachable by reading the singleton config
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// row. It is the data-foundation health check; the wallet query surface arrives
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// with the currency mechanics.
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func (s *Store) Ping(ctx context.Context) error {
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var row model.Config
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if err := postgres.SELECT(table.Config.AllColumns).
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FROM(table.Config).
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LIMIT(1).
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QueryContext(ctx, s.db, &row); err != nil {
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return fmt.Errorf("payments: ping: %w", err)
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}
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return nil
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}
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