mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-08-19 02:12:23 +00:00
71 lines
2.2 KiB
Go
71 lines
2.2 KiB
Go
// Copyright 2017 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package dpos
|
|
|
|
import (
|
|
"github.com/meitu/go-ethereum/common"
|
|
"github.com/meitu/go-ethereum/consensus"
|
|
"github.com/meitu/go-ethereum/core/types"
|
|
"github.com/meitu/go-ethereum/rpc"
|
|
|
|
"math/big"
|
|
)
|
|
|
|
// API is a user facing RPC API to allow controlling the delegate and voting
|
|
// mechanisms of the delegated-proof-of-stake
|
|
type API struct {
|
|
chain consensus.ChainReader
|
|
dpos *Dpos
|
|
}
|
|
|
|
// GetValidators retrieves the list of the validators at specified block
|
|
func (api *API) GetValidators(number *rpc.BlockNumber) ([]common.Address, error) {
|
|
var header *types.Header
|
|
if number == nil || *number == rpc.LatestBlockNumber {
|
|
header = api.chain.CurrentHeader()
|
|
} else {
|
|
header = api.chain.GetHeaderByNumber(uint64(number.Int64()))
|
|
}
|
|
if header == nil {
|
|
return nil, errUnknownBlock
|
|
}
|
|
|
|
epochTrie, err := types.NewEpochTrie(header.DposContext.EpochHash, api.dpos.db)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
dposContext := types.DposContext{}
|
|
dposContext.SetEpoch(epochTrie)
|
|
validators, err := dposContext.GetValidators()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return validators, nil
|
|
}
|
|
|
|
// GetConfirmedBlockNumber retrieves the latest irreversible block
|
|
func (api *API) GetConfirmedBlockNumber() (*big.Int, error) {
|
|
var err error
|
|
header := api.dpos.confirmedBlockHeader
|
|
if header == nil {
|
|
header, err = api.dpos.loadConfirmedBlockHeader(api.chain)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
return header.Number, nil
|
|
}
|