145 lines
3.0 KiB
Go
145 lines
3.0 KiB
Go
package ipld
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import (
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"fmt"
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node "github.com/ipfs/go-ipld-format"
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"github.com/ipfs/go-cid"
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"github.com/multiformats/go-multihash"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/rlp"
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)
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// EthLogTrie (eth-tx-trie codec 0x9p) represents
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// a node from the transaction trie in ethereum.
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type EthLogTrie struct {
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*TrieNode
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}
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/*
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OUTPUT
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*/
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// DecodeEthLogTrie returns an EthLogTrie object from its cid and rawdata.
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func DecodeEthLogTrie(c cid.Cid, b []byte) (*EthLogTrie, error) {
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tn, err := decodeTrieNode(c, b, decodeEthLogTrieLeaf)
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if err != nil {
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return nil, err
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}
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return &EthLogTrie{TrieNode: tn}, nil
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}
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// decodeEthLogTrieLeaf parses a eth-log-trie leaf
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// from decoded RLP elements
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func decodeEthLogTrieLeaf(i []interface{}) ([]interface{}, error) {
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l := new(types.Log)
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if err := rlp.DecodeBytes(i[1].([]byte), l); err != nil {
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return nil, err
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}
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c, err := RawdataToCid(MEthLogTrie, i[1].([]byte), multihash.KECCAK_256)
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if err != nil {
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return nil, err
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}
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return []interface{}{
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i[0].([]byte),
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&EthLog{
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Log: l,
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cid: c,
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rawData: i[1].([]byte),
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},
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}, nil
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}
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/*
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Block INTERFACE
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*/
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// RawData returns the binary of the RLP encode of the transaction.
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func (t *EthLogTrie) RawData() []byte {
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return t.rawdata
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}
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// Cid returns the cid of the transaction.
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func (t *EthLogTrie) Cid() cid.Cid {
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return t.cid
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}
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// String is a helper for output
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func (t *EthLogTrie) String() string {
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return fmt.Sprintf("<EthereumLogTrie %s>", t.cid)
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}
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// Loggable returns in a map the type of IPLD Link.
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func (t *EthLogTrie) Loggable() map[string]interface{} {
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return map[string]interface{}{
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"type": "eth-log-trie",
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}
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}
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// logTrie wraps a localTrie for use on the receipt trie.
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type logTrie struct {
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*localTrie
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}
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// newLogTrie initializes and returns a logTrie.
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func newLogTrie() *logTrie {
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return &logTrie{
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localTrie: newLocalTrie(),
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}
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}
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// getNodes invokes the localTrie, which computes the root hash of the
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// log trie and returns its sql keys, to return a slice
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// of EthLogTrie nodes.
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func (rt *logTrie) getNodes() ([]node.Node, error) {
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keys, err := rt.getKeys()
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if err != nil {
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return nil, err
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}
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out := make([]node.Node, 0, len(keys))
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for _, k := range keys {
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n, err := rt.getNodeFromDB(k)
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if err != nil {
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return nil, err
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}
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out = append(out, n)
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}
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return out, nil
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}
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func (rt *logTrie) getNodeFromDB(key []byte) (*EthLogTrie, error) {
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rawdata, err := rt.db.Get(key)
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if err != nil {
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return nil, err
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}
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tn := &TrieNode{
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cid: keccak256ToCid(MEthLogTrie, key),
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rawdata: rawdata,
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}
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return &EthLogTrie{TrieNode: tn}, nil
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}
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// getLeafNodes invokes the localTrie, which returns a slice
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// of EthLogTrie leaf nodes.
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func (rt *logTrie) getLeafNodes() ([]*EthLogTrie, []*nodeKey, error) {
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keys, err := rt.getLeafKeys()
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if err != nil {
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return nil, nil, err
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}
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out := make([]*EthLogTrie, 0, len(keys))
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for _, k := range keys {
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n, err := rt.getNodeFromDB(k.dbKey)
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if err != nil {
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return nil, nil, err
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}
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out = append(out, n)
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}
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return out, keys, nil
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}
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