The code aims to implement a fair and transparent withdrawal mechanism using a withdrawal queue to allow users to withdraw their staked ETH in a first-come, first-served manner
Here is a breakdown of the main components and functions in the code:
struct WithdrawalTicket: This struct represents a withdrawal ticket, which is added to the withdrawal queue. It contains the following fields:
claimed: A boolean indicating whether the ticket has been claimed by the receiver.
receiver: The address of the receiver who will receive the ETH specified in the ticket.
amount: The amount of ETH to be sent to the receiver when the ticket is processed.
accumulatedAmount: A running sum of all requested ETH.
Events:
WithdrawalQueueOpened: An event emitted when a withdrawal ticket is added to the queue.
WithdrawalQueueClosed: An event emitted when a withdrawal ticket is processed and closed.
State variables:
queueLength: The length of the withdrawal queue.
requestsFinalisedUntil: Keeps track of the latest withdrawal request that was finalized.
withdrawlAmountQueued: The total amount of ETH currently queued for withdrawal.
withdrawalQueue: A mapping representing the withdrawal queue. The key is the index in the queue, and the value is a WithdrawalTicket struct.
claim function: This function allows a receiver to claim their ETH from a specific withdrawal ticket. It checks if the ticket is final, not already claimed, and then transfers the ETH to the receiver.
processWithdrawalQueue function: This function is used by the contract operator to process the withdrawal queue. It checks the available ETH balance of the contract and reserves any pending withdrawals with the available balance. It updates the requestsFinalisedUntil variable and the withdrawlAmountQueued accordingly.
_withdraw internal function: This function is called to withdraw assets (ETH) from the contract. It checks the available balance, and if the available balance is insufficient, it adds a new withdrawal ticket to the queue. It then emits a WithdrawalQueueOpened event. Finally, it transfers the available assets (ETH) to the receiver.
Summary:
The code aims to implement a fair and transparent withdrawal mechanism using a withdrawal queue to allow users to withdraw their staked ETH in a first-come, first-served manner
Here is a breakdown of the main components and functions in the code:
struct WithdrawalTicket
: This struct represents a withdrawal ticket, which is added to the withdrawal queue. It contains the following fields:claimed
: A boolean indicating whether the ticket has been claimed by the receiver.receiver
: The address of the receiver who will receive the ETH specified in the ticket.amount
: The amount of ETH to be sent to the receiver when the ticket is processed.accumulatedAmount
: A running sum of all requested ETH.Events:
WithdrawalQueueOpened
: An event emitted when a withdrawal ticket is added to the queue.WithdrawalQueueClosed
: An event emitted when a withdrawal ticket is processed and closed.State variables:
queueLength
: The length of the withdrawal queue.requestsFinalisedUntil
: Keeps track of the latest withdrawal request that was finalized.withdrawlAmountQueued
: The total amount of ETH currently queued for withdrawal.withdrawalQueue
: A mapping representing the withdrawal queue. The key is the index in the queue, and the value is a WithdrawalTicket struct.claim
function: This function allows a receiver to claim their ETH from a specific withdrawal ticket. It checks if the ticket is final, not already claimed, and then transfers the ETH to the receiver.processWithdrawalQueue
function: This function is used by the contract operator to process the withdrawal queue. It checks the available ETH balance of the contract and reserves any pending withdrawals with the available balance. It updates the requestsFinalisedUntil variable and the withdrawlAmountQueued accordingly._withdraw
internal function: This function is called to withdraw assets (ETH) from the contract. It checks the available balance, and if the available balance is insufficient, it adds a new withdrawal ticket to the queue. It then emits a WithdrawalQueueOpened event. Finally, it transfers the available assets (ETH) to the receiver.Spawn from following hexens guidelines: