cosmos-sdk/x/group/spec/03_messages.md

Msg Service

Msg/CreateGroup

A new group can be created with the MsgCreateGroup, which has an admin address, a list of members and some optional metadata.

The metadata has a maximum length that is chosen by the app developer, and passed into the group keeper as a config.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L65-L76

It's expected to fail if

• metadata length is greater than MaxMetadataLen config
• members are not correctly set (e.g. wrong address format, duplicates, or with 0 weight).

Msg/UpdateGroupMembers

Group members can be updated with the UpdateGroupMembers.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L85-L98

In the list of MemberUpdates, an existing member can be removed by setting its weight to 0.

It's expected to fail if:

• the signer is not the admin of the group.
• for any one of the associated group policies, if its decision policy's Validate() method fails against the updated group.

Msg/UpdateGroupAdmin

The UpdateGroupAdmin can be used to update a group admin.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L103-L115

It's expected to fail if the signer is not the admin of the group.

Msg/UpdateGroupMetadata

The UpdateGroupMetadata can be used to update a group metadata.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L120-L132

It's expected to fail if:

• new metadata length is greater than MaxMetadataLen config.
• the signer is not the admin of the group.

Msg/CreateGroupPolicy

A new group policy can be created with the MsgCreateGroupPolicy, which has an admin address, a group id, a decision policy and some optional metadata.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L141-L158

It's expected to fail if:

• the signer is not the admin of the group.
• metadata length is greater than MaxMetadataLen config.
• the decision policy's Validate() method doesn't pass against the group.

Msg/CreateGroupWithPolicy

A new group with policy can be created with the MsgCreateGroupWithPolicy, which has an admin address, a list of members, a decision policy, a group_policy_as_admin field to optionally set group and group policy admin with group policy address and some optional metadata for group and group policy.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L181-L202

It's expected to fail for the same reasons as Msg/CreateGroup and Msg/CreateGroupPolicy.

Msg/UpdateGroupPolicyAdmin

The UpdateGroupPolicyAdmin can be used to update a group policy admin.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L167-L179

It's expected to fail if the signer is not the admin of the group policy.

Msg/UpdateGroupPolicyDecisionPolicy

The UpdateGroupPolicyDecisionPolicy can be used to update a decision policy.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L217-L231

It's expected to fail if:

• the signer is not the admin of the group policy.
• the new decision policy's Validate() method doesn't pass against the group.

Msg/UpdateGroupPolicyMetadata

The UpdateGroupPolicyMetadata can be used to update a group policy metadata.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L236-L248

It's expected to fail if:

• new metadata length is greater than MaxMetadataLen config.
• the signer is not the admin of the group.

Msg/SubmitProposal

A new proposal can be created with the MsgSubmitProposal, which has a group policy account address, a list of proposers addresses, a list of messages to execute if the proposal is accepted and some optional metadata. An optional Exec value can be provided to try to execute the proposal immediately after proposal creation. Proposers signatures are considered as yes votes in this case.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L271-L294

It's expected to fail if:

• metadata length is greater than MaxMetadataLen config.
• if any of the proposers is not a group member.

Msg/WithdrawProposal

A proposal can be withdrawn using MsgWithdrawProposal which has an address (can be either a proposer or the group policy admin) and a proposal_id (which has to be withdrawn).

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L303-L310

It's expected to fail if:

• the signer is neither the group policy admin nor proposer of the proposal.
• the proposal is already closed or aborted.

Msg/Vote

A new vote can be created with the MsgVote, given a proposal id, a voter address, a choice (yes, no, veto or abstain) and some optional metadata. An optional Exec value can be provided to try to execute the proposal immediately after voting.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L315-L333

It's expected to fail if:

• metadata length is greater than MaxMetadataLen config.
• the proposal is not in voting period anymore.

Msg/Exec

A proposal can be executed with the MsgExec.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L338-L347

The messages that are part of this proposal won't be executed if:

• the proposal has not been accepted by the group policy.
• the proposal has already been successfully executed.

Msg/LeaveGroup

The MsgLeaveGroup allows group member to leave a group.

+++ https://github.com/cosmos/cosmos-sdk/blob/v0.46.0-beta2/proto/cosmos/group/v1/tx.proto#L352-L361

It's expected to fail if:

• the group member is not part of the group.
• for any one of the associated group policies, if its decision policy's Validate() method fails against the updated group.