CouponMinter — rate limit utilities

ocp.CouponMinter hosts off-ledger helpers that mirror the DAML rate limit policy: minIntervalMicros = (lastMint.count * 1_000_000) / maxTps. When maxTps is null or there was no prior mint, minting is always allowed. These utilities help you avoid submitting MintCoupons transactions that the contract would reject for pacing.

Setup

import { OcpClient } from '@open-captable-protocol/canton';

const ocp = new OcpClient({ ledger: canton.ledger });

Topic pages

• canMintCouponsNow
• getRateLimitStatus
• waitUntilCanMint
• mintWithRateLimit

Payload shape (CouponMinterPayload)

• operator — operator party controlling the minter.
• maxTps — string | null (decimal string from chain); null disables rate limiting in helpers.
• lastMint — null or { time: string; count: number } (DAML time ISO string).

See also

• Errors — OcpValidationError from pure checks; compare with WaitAbortedError / WaitTimeoutError.

Source

• src/functions/CouponMinter/
• src/OcpClient.ts — namespace wiring