Access Control

With the exception of the admin functions, all functions in Flow can only be triggered by users. The Comptroller has no control over any stream or any part of the protocol.

This article will provide a comprehensive overview of the actions that can be performed on streams once they are created, as well as the corresponding user permissions for each action.

note

Every stream has a sender and a recipient. Recipients can approve third parties to take actions on their behalf. A 'public' caller is any address outside of sender and recipient.

Overview

The table below offers a quick overview of the access control for each action that can be performed on a stream.

Action	Sender	Recipient / Approved third party	Public
AdjustRatePerSecond	✅	❌	❌
Deposit	✅	✅	✅
Pause	✅	❌	❌
Refund	✅	❌	❌
Restart	✅	❌	❌
Transfer NFT	❌	✅	❌
Withdraw to any address	❌	✅	❌
Withdraw to recipient	✅	✅	✅
Void	✅	✅	❌

Adjust rate per second

Only the sender can adjust the rate per second of a stream.

Create stream

Deposit into a stream

Anyone can deposit into a stream.

Pause

Only the sender can pause a stream.

Refund from a stream

Only the sender can refund from a stream.

Restarting a stream

Only the sender can restart a stream.

Voiding a stream

Both Sender and Recipient can void a stream.

Withdraw from a stream

Anyone can call withdraw on a stream as long as to address matches the recipient. If recipient/operator is calling withdraw on a stream, they can choose to withdraw to any address.