Display guard information in settings

[tschubotz]

What is this feature about? (1 sentence)

This will display the address of a transaction guard in case it was set.

Why is it needed? What is the value? For whom do we build it?

• Starting with 1.3.0 , the Safe contracts allow to set a transaction guard.
  • https://github.com/gnosis/safe-contracts/blob/main/contracts/base/GuardManager.sol
  • https://github.com/gnosis/safe-contracts/blob/186a21a74b327f17fc41217a927dea7064f74604/CHANGELOG.md#add-transaction-guard
• This information whether a guard was set or not is security-critical, same like enabled modules.

High-level overview of the feature

• In the settings, there is a new section below Safe modules called Transaction guard
  • Subtitle: Transaction guards impose additional constraints that are checked prior to executing a Safe transaction. Transaction guards are potentially risky, so make sure to only use modules from trusted sources.
  • This section is only visible for Safes with version 1.3.0 or higher.
• Only 1 guard can be set at a time. (different compared to modules)
• The address of the set guard should be displayed with identicon, copy button and block explorer link. (same like for modules)
• No need for the feature to add a guard (similar like for modules)
• It should be possible to remove a guard (similar like for modules)
• If not guard is set, it should say No transaction guard set (similar like for modules)
• There should be link to a help center article (similar like for modules): https://help.gnosis-safe.io/en/articles/5324092-what-is-a-transaction-guard

Screens

These are screens for modules just for reference:

Other things

• The tx service returns this information with Return guard information for Safe contracts >= 1.3.0 safe-global/safe-transaction-service#268
• The client gateway has yet to return this information afaik.

[liliya-soroka]

the Guard address for testing 0x4f8a82d73729A33E0165aDeF3450A7F85f007528