forked from cerc-io/ipld-eth-server
115 lines
3.0 KiB
Go
115 lines
3.0 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/rlp"
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)
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// EthStateTrie (eth-state-trie, codec 0x96), represents
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// a node from the satte trie in ethereum.
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type EthStateTrie struct {
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*TrieNode
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}
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// Static (compile time) check that EthStateTrie satisfies the node.Node interface.
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var _ node.Node = (*EthStateTrie)(nil)
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/*
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INPUT
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*/
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// FromStateTrieRLP takes the RLP representation of an ethereum
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// state trie node to return it as an IPLD node for further processing.
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func FromStateTrieRLP(raw []byte) (*EthStateTrie, error) {
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c, err := RawdataToCid(MEthStateTrie, raw, 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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// Let's run the whole mile and process the nodeKind and
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// its elements, in case somebody would need this function
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// to parse an RLP element from the filesystem
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return DecodeEthStateTrie(c, raw)
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}
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/*
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OUTPUT
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*/
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// DecodeEthStateTrie returns an EthStateTrie object from its cid and rawdata.
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func DecodeEthStateTrie(c cid.Cid, b []byte) (*EthStateTrie, error) {
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tn, err := decodeTrieNode(c, b, decodeEthStateTrieLeaf)
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if err != nil {
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return nil, err
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}
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return &EthStateTrie{TrieNode: tn}, nil
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}
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// decodeEthStateTrieLeaf parses a eth-tx-trie leaf
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// from decoded RLP elements
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func decodeEthStateTrieLeaf(i []interface{}) ([]interface{}, error) {
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var account EthAccount
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err := rlp.DecodeBytes(i[1].([]byte), &account)
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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(MEthAccountSnapshot, 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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&EthAccountSnapshot{
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EthAccount: &account,
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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 state trie node.
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func (st *EthStateTrie) RawData() []byte {
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return st.rawdata
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}
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// Cid returns the cid of the state trie node.
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func (st *EthStateTrie) Cid() cid.Cid {
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return st.cid
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}
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// String is a helper for output
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func (st *EthStateTrie) String() string {
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return fmt.Sprintf("<EthereumStateTrie %s>", st.cid)
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}
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// Loggable returns in a map the type of IPLD Link.
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func (st *EthStateTrie) Loggable() map[string]interface{} {
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return map[string]interface{}{
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"type": "eth-state-trie",
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}
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}
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