InMemoryCurbStore
classStorageZero-dependency in-memory store — great for tests and single-instance deployments.
new InMemoryCurbStore()Implements the full CurbStore interface in memory. Spend is a rolling 24h window split into committed (settled) payments and short-lived atomic holds, so two concurrent payments can’t both slip under the cap.
Methods
allowAccount(agent: string, account: string): voidSeed an allowlisted counterparty (test helper).
isAllowed(agent, account): Promise<boolean>Is this counterparty allowlisted?
getDailySpend(agent): Promise<number>Committed (settled) spend in the rolling window.
incrDailySpend(agent, amount): Promise<void>Add to committed spend directly (e.g. seeding).
tryReserveSpend(agent, key, amount, cap): Promise<boolean>Atomically place a hold if committed + holds + amount ≤ cap. Idempotent per key.
commitSpend(agent, key, amount): Promise<void>Convert a hold into committed spend once the payment executes.
getApproval(requestId): Promise<ApprovalStatus | null>Approval status for a payment.
setApproval(requestId, status): Promise<void>Set an approval (pending / approved / rejected). The in-memory store ignores the interface’s optional meta.
consumeApproval(requestId): Promise<void>Single-use: consume an approval after it’s used.
Example
import { InMemoryCurbStore } from 'hedera-curb';
const store = new InMemoryCurbStore();
store.allowAccount('0.0.A', '0.0.PROVIDER');
const key = 'pay-1'; // any unique id for this payment
await store.tryReserveSpend('0.0.A', key, 2, 25); // → true (held)
await store.commitSpend('0.0.A', key, 2); // settled