增加支付逻辑

database/migrations/0007_wechat_native_payments.sql

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+-- Orders are written before calling WeChat. Keep them when a user or
+-- organization is deleted so paid money cannot lose its audit trail.
+create table if not exists public.payment_orders (
+  id text primary key check (length(id) between 1 and 32 and id ~ '^[A-Za-z0-9_-]+$'),
+  organization_id text not null references public.platform_organizations(id) on delete restrict,
+  account_id text not null references public.platform_users(id) on delete restrict,
+  request_key text not null check (length(request_key) between 1 and 64 and request_key ~ '^[A-Za-z0-9_-]+$'),
+  mch_id text not null check (length(mch_id) between 1 and 64),
+  app_id text not null check (length(app_id) between 1 and 64),
+  amount_fen bigint not null check (amount_fen between 1 and 1000000),
+  currency text not null check (currency = 'CNY'),
+  status text not null default 'pending' check (status in ('pending', 'paid', 'closed')),
+  code_url text,
+  transaction_id text,
+  created_at timestamptz not null default now(),
+  updated_at timestamptz not null default now(),
+  expires_at timestamptz not null,
+  paid_at timestamptz,
+  constraint payment_orders_paid_fields_check check (
+    (status = 'paid' and transaction_id is not null and length(transaction_id) > 0 and paid_at is not null)
+    or (status <> 'paid' and transaction_id is null and paid_at is null)
+  ),
+  constraint payment_orders_expiry_check check (expires_at > created_at),
+  constraint payment_orders_org_request_unique unique (organization_id, request_key)
+);
+
+create unique index if not exists payment_orders_provider_transaction_unique
+  on public.payment_orders(mch_id, transaction_id) where transaction_id is not null;
+create index if not exists payment_orders_org_created_idx
+  on public.payment_orders(organization_id, created_at desc);
+create index if not exists payment_orders_pending_check_idx
+  on public.payment_orders(updated_at, created_at) where status = 'pending';

database/migrations/0008_wechat_refunds.sql

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+-- Reserve each requested refund against its original, successful payment.
+-- A successful external refund can exceed the current wallet balance.
+alter table public.billing_wallets drop constraint if exists billing_wallets_balance_fen_check;
+alter table public.billing_ledger drop constraint if exists billing_ledger_balance_after_fen_check;
+alter table public.billing_ledger drop constraint if exists billing_ledger_kind_check;
+alter table public.billing_ledger add constraint billing_ledger_kind_check
+  check (kind in ('recharge', 'charge', 'refund', 'adjustment', 'recharge_refund'));
+
+create table public.payment_refunds (
+  id text primary key check (length(id) between 1 and 32 and id ~ '^[A-Za-z0-9_-]+$'),
+  order_id text not null references public.payment_orders(id) on delete restrict,
+  organization_id text not null references public.platform_organizations(id) on delete restrict,
+  operator_id text not null references public.platform_users(id) on delete restrict,
+  request_key text not null check (length(request_key) between 1 and 64 and request_key ~ '^[A-Za-z0-9_-]+$'),
+  mch_id text not null check (length(mch_id) between 1 and 64),
+  transaction_id text not null check (length(transaction_id) > 0),
+  provider_id text,
+  amount_fen bigint not null check (amount_fen > 0),
+  total_fen bigint not null check (total_fen > 0 and total_fen >= amount_fen),
+  currency text not null check (currency = 'CNY'),
+  reason text not null,
+  status text not null default 'pending' check (status in ('pending', 'processing', 'success', 'closed', 'abnormal', 'rejected')),
+  failure_reason text not null default '',
+  created_at timestamptz not null default now(),
+  updated_at timestamptz not null default now(),
+  succeeded_at timestamptz,
+  constraint payment_refunds_request_unique unique (order_id, request_key),
+  constraint payment_refunds_success_check check ((status = 'success') = (succeeded_at is not null))
+);
+create unique index payment_refunds_provider_unique on public.payment_refunds(mch_id, provider_id)
+  where provider_id is not null;
+create index payment_refunds_order_idx on public.payment_refunds(order_id, created_at desc, id desc);
+create index payment_refunds_pending_idx on public.payment_refunds(updated_at, created_at, id)
+  where status in ('pending', 'processing', 'abnormal');