mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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c213fd1fd8
There is no need to depend on the old context package now that the minimum Go version is 1.7. The move to "context" eliminates our weird vendoring setup. Some vendored code still uses golang.org/x/net/context and it is now vendored in the normal way. This change triggered new vet checks around context.WithTimeout which didn't fire with golang.org/x/net/context.
160 lines
4.6 KiB
Go
160 lines
4.6 KiB
Go
// Copyright 2015 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 light implements on-demand retrieval capable state and chain objects
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// for the Ethereum Light Client.
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package light
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import (
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"context"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/rlp"
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)
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// NoOdr is the default context passed to an ODR capable function when the ODR
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// service is not required.
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var NoOdr = context.Background()
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// OdrBackend is an interface to a backend service that handles ODR retrievals
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type OdrBackend interface {
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Database() ethdb.Database
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Retrieve(ctx context.Context, req OdrRequest) error
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}
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// OdrRequest is an interface for retrieval requests
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type OdrRequest interface {
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StoreResult(db ethdb.Database)
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}
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// TrieID identifies a state or account storage trie
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type TrieID struct {
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BlockHash, Root common.Hash
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BlockNumber uint64
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AccKey []byte
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}
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// StateTrieID returns a TrieID for a state trie belonging to a certain block
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// header.
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func StateTrieID(header *types.Header) *TrieID {
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return &TrieID{
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BlockHash: header.Hash(),
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BlockNumber: header.Number.Uint64(),
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AccKey: nil,
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Root: header.Root,
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}
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}
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// StorageTrieID returns a TrieID for a contract storage trie at a given account
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// of a given state trie. It also requires the root hash of the trie for
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// checking Merkle proofs.
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func StorageTrieID(state *TrieID, addr common.Address, root common.Hash) *TrieID {
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return &TrieID{
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BlockHash: state.BlockHash,
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BlockNumber: state.BlockNumber,
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AccKey: crypto.Keccak256(addr[:]),
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Root: root,
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}
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}
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// TrieRequest is the ODR request type for state/storage trie entries
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type TrieRequest struct {
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OdrRequest
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Id *TrieID
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Key []byte
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Proof []rlp.RawValue
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}
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// StoreResult stores the retrieved data in local database
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func (req *TrieRequest) StoreResult(db ethdb.Database) {
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storeProof(db, req.Proof)
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}
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// storeProof stores the new trie nodes obtained from a merkle proof in the database
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func storeProof(db ethdb.Database, proof []rlp.RawValue) {
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for _, buf := range proof {
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hash := crypto.Keccak256(buf)
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val, _ := db.Get(hash)
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if val == nil {
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db.Put(hash, buf)
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}
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}
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}
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// CodeRequest is the ODR request type for retrieving contract code
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type CodeRequest struct {
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OdrRequest
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Id *TrieID
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Hash common.Hash
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Data []byte
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}
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// StoreResult stores the retrieved data in local database
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func (req *CodeRequest) StoreResult(db ethdb.Database) {
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db.Put(req.Hash[:], req.Data)
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}
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// BlockRequest is the ODR request type for retrieving block bodies
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type BlockRequest struct {
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OdrRequest
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Hash common.Hash
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Number uint64
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Rlp []byte
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}
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// StoreResult stores the retrieved data in local database
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func (req *BlockRequest) StoreResult(db ethdb.Database) {
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core.WriteBodyRLP(db, req.Hash, req.Number, req.Rlp)
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}
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// ReceiptsRequest is the ODR request type for retrieving block bodies
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type ReceiptsRequest struct {
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OdrRequest
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Hash common.Hash
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Number uint64
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Receipts types.Receipts
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}
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// StoreResult stores the retrieved data in local database
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func (req *ReceiptsRequest) StoreResult(db ethdb.Database) {
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core.WriteBlockReceipts(db, req.Hash, req.Number, req.Receipts)
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}
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// TrieRequest is the ODR request type for state/storage trie entries
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type ChtRequest struct {
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OdrRequest
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ChtNum, BlockNum uint64
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ChtRoot common.Hash
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Header *types.Header
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Td *big.Int
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Proof []rlp.RawValue
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}
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// StoreResult stores the retrieved data in local database
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func (req *ChtRequest) StoreResult(db ethdb.Database) {
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// if there is a canonical hash, there is a header too
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core.WriteHeader(db, req.Header)
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hash, num := req.Header.Hash(), req.Header.Number.Uint64()
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core.WriteTd(db, hash, num, req.Td)
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core.WriteCanonicalHash(db, hash, num)
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//storeProof(db, req.Proof)
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}
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