light: light chain, VM env and tx pool
This commit is contained in:
Zsolt Felfoldi
committed by
Felix Lange
Felix Lange
parent
8b1df1a259
commit
760fd65487
124
light/odr.go
124
light/odr.go
@ -19,14 +19,22 @@
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package light
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import (
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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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"golang.org/x/net/context"
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)
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// OdrBackend is an interface to a backend service that handles odr retrievals
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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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@ -37,17 +45,44 @@ 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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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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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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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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root common.Hash
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key []byte
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proof []rlp.RawValue
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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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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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@ -61,38 +96,61 @@ func storeProof(db ethdb.Database, proof []rlp.RawValue) {
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}
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}
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// NodeDataRequest is the ODR request type for node data (used for retrieving contract code)
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type NodeDataRequest struct {
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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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hash common.Hash
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data []byte
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}
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// GetData returns the retrieved node data after a successful request
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func (req *NodeDataRequest) GetData() []byte {
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return req.data
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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 *NodeDataRequest) StoreResult(db ethdb.Database) {
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db.Put(req.hash[:], req.GetData())
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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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var sha3_nil = crypto.Keccak256Hash(nil)
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// retrieveNodeData tries to retrieve node data with the given hash from the network
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func retrieveNodeData(ctx context.Context, odr OdrBackend, hash common.Hash) ([]byte, error) {
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if hash == sha3_nil {
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return nil, nil
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}
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res, _ := odr.Database().Get(hash[:])
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if res != nil {
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return res, nil
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}
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r := &NodeDataRequest{hash: hash}
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if err := odr.Retrieve(ctx, r); err != nil {
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return nil, err
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} else {
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return r.GetData(), nil
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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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