153 lines
3.6 KiB
Go
153 lines
3.6 KiB
Go
// VulcanizeDB
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// Copyright © 2019 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero 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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// This program 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 Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package ipld
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import (
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"fmt"
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"github.com/ipfs/go-cid"
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node "github.com/ipfs/go-ipld-format"
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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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// EthRctTrie (eth-tx-trie codec 0x92) represents
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// a node from the transaction trie in ethereum.
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type EthRctTrie struct {
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*TrieNode
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}
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// Static (compile time) check that EthRctTrie satisfies the node.Node interface.
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var _ node.Node = (*EthRctTrie)(nil)
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/*
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INPUT
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*/
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// To create a proper trie of the eth-tx-trie objects, it is required
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// to input all transactions belonging to a forest in a single step.
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// We are adding the transactions, and creating its trie on
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// block body parsing time.
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/*
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OUTPUT
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*/
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// DecodeEthRctTrie returns an EthRctTrie object from its cid and rawdata.
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func DecodeEthRctTrie(c cid.Cid, b []byte) (*EthRctTrie, error) {
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tn, err := decodeTrieNode(c, b, decodeEthRctTrieLeaf)
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if err != nil {
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return nil, err
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}
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return &EthRctTrie{TrieNode: tn}, nil
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}
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// decodeEthRctTrieLeaf parses a eth-rct-trie leaf
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//from decoded RLP elements
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func decodeEthRctTrieLeaf(i []interface{}) ([]interface{}, error) {
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var r types.Receipt
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err := rlp.DecodeBytes(i[1].([]byte), &r)
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if err != nil {
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return nil, err
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}
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c, err := RawdataToCid(MEthTxReceipt, 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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&EthReceipt{
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Receipt: &r,
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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 *EthRctTrie) 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 *EthRctTrie) 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 *EthRctTrie) String() string {
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return fmt.Sprintf("<EthereumRctTrie %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 *EthRctTrie) Loggable() map[string]interface{} {
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return map[string]interface{}{
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"type": "eth-rct-trie",
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}
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}
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/*
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EthRctTrie functions
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*/
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// rctTrie wraps a localTrie for use on the receipt trie.
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type rctTrie struct {
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*localTrie
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}
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// newRctTrie initializes and returns a rctTrie.
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func newRctTrie() *rctTrie {
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return &rctTrie{
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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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// transaction trie and returns its database keys, to return a slice
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// of EthRctTrie nodes.
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func (rt *rctTrie) getNodes() []*EthRctTrie {
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keys := rt.getKeys()
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var out []*EthRctTrie
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it := rt.trie.NodeIterator([]byte{})
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for it.Next(true) {
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}
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for _, k := range keys {
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rawdata, err := rt.db.Get(k)
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if err != nil {
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panic(err)
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}
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c, err := RawdataToCid(MEthTxReceiptTrie, rawdata, multihash.KECCAK_256)
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if err != nil {
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return nil
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}
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tn := &TrieNode{
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cid: c,
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rawdata: rawdata,
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}
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out = append(out, &EthRctTrie{TrieNode: tn})
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}
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return out
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}
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