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85 lines
2.9 KiB
Go
85 lines
2.9 KiB
Go
// Copyright 2019 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package les
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import (
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"errors"
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"github.com/ethereum/go-ethereum/common/hexutil"
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)
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var (
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errNoCheckpoint = errors.New("no local checkpoint provided")
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errNotActivated = errors.New("checkpoint registrar is not activated")
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)
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// PrivateLightAPI provides an API to access the LES light server or light client.
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type PrivateLightAPI struct {
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backend *lesCommons
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reg *checkpointOracle
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}
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// NewPrivateLightAPI creates a new LES service API.
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func NewPrivateLightAPI(backend *lesCommons, reg *checkpointOracle) *PrivateLightAPI {
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return &PrivateLightAPI{
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backend: backend,
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reg: reg,
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}
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}
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// LatestCheckpoint returns the latest local checkpoint package.
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//
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// The checkpoint package consists of 4 strings:
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// result[0], hex encoded latest section index
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// result[1], 32 bytes hex encoded latest section head hash
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// result[2], 32 bytes hex encoded latest section canonical hash trie root hash
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// result[3], 32 bytes hex encoded latest section bloom trie root hash
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func (api *PrivateLightAPI) LatestCheckpoint() ([4]string, error) {
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var res [4]string
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cp := api.backend.latestLocalCheckpoint()
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if cp.Empty() {
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return res, errNoCheckpoint
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}
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res[0] = hexutil.EncodeUint64(cp.SectionIndex)
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res[1], res[2], res[3] = cp.SectionHead.Hex(), cp.CHTRoot.Hex(), cp.BloomRoot.Hex()
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return res, nil
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}
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// GetLocalCheckpoint returns the specific local checkpoint package.
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//
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// The checkpoint package consists of 3 strings:
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// result[0], 32 bytes hex encoded latest section head hash
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// result[1], 32 bytes hex encoded latest section canonical hash trie root hash
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// result[2], 32 bytes hex encoded latest section bloom trie root hash
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func (api *PrivateLightAPI) GetCheckpoint(index uint64) ([3]string, error) {
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var res [3]string
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cp := api.backend.getLocalCheckpoint(index)
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if cp.Empty() {
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return res, errNoCheckpoint
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}
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res[0], res[1], res[2] = cp.SectionHead.Hex(), cp.CHTRoot.Hex(), cp.BloomRoot.Hex()
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return res, nil
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}
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// GetCheckpointContractAddress returns the contract contract address in hex format.
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func (api *PrivateLightAPI) GetCheckpointContractAddress() (string, error) {
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if api.reg == nil {
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return "", errNotActivated
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}
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return api.reg.config.Address.Hex(), nil
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}
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