feat: emit proposer address in submit proposal event

Author: akaladarshi

x/gov/keeper/proposal.go

@@ -147,6 +147,7 @@ func (k Keeper) SubmitProposal(ctx context.Context, messages []sdk.Msg, metadata
 	if err := k.environment.EventService.EventManager(ctx).EmitKV(
 		types.EventTypeSubmitProposal,
 		event.NewAttribute(types.AttributeKeyProposalID, fmt.Sprintf("%d", proposalID)),
+		event.NewAttribute(types.AttributeKeyProposalProposer, proposer.String()),
 		event.NewAttribute(types.AttributeKeyProposalMessages, strings.Join(msgs, ",")),
 	); err != nil {
 		return v1.Proposal{}, fmt.Errorf("failed to emit event: %w", err)

x/gov/types/events.go

@@ -17,6 +17,7 @@ const (
 	AttributeKeyVotingPeriodStart    = "voting_period_start"
 	AttributeKeyProposalLog          = "proposal_log"           // log of proposal execution
 	AttributeKeyProposalDepositError = "proposal_deposit_error" // error on proposal deposit refund/burn
+	AttributeKeyProposalProposer     = "proposal_proposer"      // account address of the proposer
 
 	AttributeValueProposalDropped            = "proposal_dropped"             // didn't meet min deposit
 	AttributeValueProposalPassed             = "proposal_passed"              // met vote quorum