# Issuance ## ERC7540LikeDepositQueue Ordered queue for handling async deposits of a specific asset for shares. Partially compatible with ERC-7540. Config: * `asset` : the ERC20 token deposited in exchange for shares * `minRequestDuration` : minimum time before a request is cancellable * `depositRestriction` : deposit request restriction * `None` : no restrictions * `ControllerAllowlist` : in-contract allowlist for depositors Usage: * depositors create requests for specific amounts of `asset` * `asset` amounts for pending requests are escrowed in the queue contract * admins selectively execute requests; shares are minted to depositors, `asset` amounts of executed requests are moved to `Shares` Notes: * Charges entrance fee, if set on `FeeHandler` * Request execution order and timing is at the discretion of admins * Whether or not to execute specific requests is at the discretion of admins ## ERC7540LikeRedeemQueue Ordered queue for handling async redemptions of shares for a specific asset. Partially compatible with ERC-7540. Config: * `asset` : the ERC20 token withdrawn in exchange for shares * `minRequestDuration` : minimum time before a request is cancellable Usage: * redeemers create requests for specific amounts of shares * shares amounts for pending requests are escrowed in the queue contract * admins selectively execute requests; shares are burned from escrow, `asset` amounts are distributed to redeemers Notes: * Charges exit fee, if set on `FeeHandler` * Request execution order and timing is at the discretion of admins * Whether or not to execute specific requests is at the discretion of admins --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.enzyme.finance/onyx-protocol/contract-implementations/issuance.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.