Wallet Ledger

Wallet balances are tracked by wallet columns and ledger entries.

Wallet Fields

Field	Meaning
`available_balance_cents`	Spendable or withdrawable balance
`pending_balance_cents`	Pending bank transfer top-ups

Type	Direction	Description
`topup`	`credit`	Wallet top-up
`guest_post_order`	`debit`	Advertiser pays for guest post order
`guest_post_payout`	`credit`	Publisher receives payout after approval

Payment and payout ledgers use idempotency_key to prevent duplicated wallet movement.