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03_messages.md

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Messages

In this section we describe the processing of messages for the authz module.

MsgGrant

An authorization grant is created using the MsgGrant message. If there is already a grant for the (granter, grantee, Authorization) triple, then the new grant will overwrite the previous one. To update or extend an existing grant, a new grant with the same (granter, grantee, Authorization) triple should be created.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/proto/cosmos/authz/v1beta1/tx.proto#L32-L37

The message handling should fail if:

  • both granter and grantee have the same address.
  • provided Expiration time is less than current unix timestamp.
  • provided Grant.Authorization is not implemented.
  • Authorization.MsgTypeURL() is not defined in the router (there is no defined handler in the app router to handle that Msg types).

MsgRevoke

A grant can be removed with the MsgRevoke message.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/proto/cosmos/authz/v1beta1/tx.proto#L60-L64

The message handling should fail if:

  • both granter and grantee have the same address.
  • provided MsgTypeUrl is empty.

NOTE: The MsgExec message removes a grant if the grant has expired.

MsgExec

When a grantee wants to execute a transaction on behalf of a granter, they must send MsgExec.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.43.0-beta1/proto/cosmos/authz/v1beta1/tx.proto#L47-L53

The message handling should fail if:

  • provided Authorization is not implemented.
  • grantee doesn't have permission to run the transaction.
  • if granted authorization is expired.