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			60 lines
		
	
	
		
			1.9 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			60 lines
		
	
	
		
			1.9 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
package common
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import (
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	"fmt"
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	"github.com/cosmos/cosmos-sdk/client"
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	sdk "github.com/cosmos/cosmos-sdk/types"
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	authtx "github.com/cosmos/cosmos-sdk/x/auth/tx"
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	"github.com/0glabs/0g-chain/x/committee/types"
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)
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// Note: QueryProposer is copied in from the gov module
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const (
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	defaultPage  = 1
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	defaultLimit = 30 // should be consistent with tendermint/tendermint/rpc/core/pipe.go:19
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)
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// Proposer contains metadata of a governance proposal used for querying a proposer.
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type Proposer struct {
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	ProposalID uint64 `json:"proposal_id" yaml:"proposal_id"`
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	Proposer   string `json:"proposer" yaml:"proposer"`
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}
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// NewProposer returns a new Proposer given id and proposer
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func NewProposer(proposalID uint64, proposer string) Proposer {
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	return Proposer{proposalID, proposer}
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}
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func (p Proposer) String() string {
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	return fmt.Sprintf("Proposal with ID %d was proposed by %s", p.ProposalID, p.Proposer)
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}
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// QueryProposer will query for a proposer of a governance proposal by ID.
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func QueryProposer(cliCtx client.Context, proposalID uint64) (Proposer, error) {
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	events := []string{
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		fmt.Sprintf("%s.%s='%s'", sdk.EventTypeMessage, sdk.AttributeKeyAction, types.TypeMsgSubmitProposal),
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		fmt.Sprintf("%s.%s='%s'", types.EventTypeProposalSubmit, types.AttributeKeyProposalID, []byte(fmt.Sprintf("%d", proposalID))),
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	}
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	// NOTE: SearchTxs is used to facilitate the txs query which does not currently
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	// support configurable pagination.
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	searchResult, err := authtx.QueryTxsByEvents(cliCtx, events, defaultPage, defaultLimit, "")
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	if err != nil {
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		return Proposer{}, err
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	}
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	for _, info := range searchResult.Txs {
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		for _, msg := range info.GetTx().GetMsgs() {
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			// there should only be a single proposal under the given conditions
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			if subMsg, ok := msg.(*types.MsgSubmitProposal); ok {
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				return NewProposer(proposalID, subMsg.Proposer), nil
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			}
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		}
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	}
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	return Proposer{}, fmt.Errorf("failed to find the proposer for proposalID %d", proposalID)
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}
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