ipld-eth-server/pkg/btc/publish_and_indexer.go
2020-05-29 22:02:47 -05:00

125 lines
3.8 KiB
Go

// VulcanizeDB
// Copyright © 2019 Vulcanize
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package btc
import (
"fmt"
"strconv"
"github.com/vulcanize/ipfs-chain-watcher/pkg/ipfs/ipld"
"github.com/vulcanize/ipfs-chain-watcher/pkg/postgres"
"github.com/vulcanize/ipfs-chain-watcher/pkg/shared"
)
// IPLDPublisherAndIndexer satisfies the IPLDPublisher interface for bitcoin
// It interfaces directly with the public.blocks table of PG-IPFS rather than going through an ipfs intermediary
// It publishes and indexes IPLDs together in a single sqlx.Tx
type IPLDPublisherAndIndexer struct {
indexer *CIDIndexer
}
// NewIPLDPublisherAndIndexer creates a pointer to a new IPLDPublisherAndIndexer which satisfies the IPLDPublisher interface
func NewIPLDPublisherAndIndexer(db *postgres.DB) *IPLDPublisherAndIndexer {
return &IPLDPublisherAndIndexer{
indexer: NewCIDIndexer(db),
}
}
// Publish publishes an IPLDPayload to IPFS and returns the corresponding CIDPayload
func (pub *IPLDPublisherAndIndexer) Publish(payload shared.ConvertedData) (shared.CIDsForIndexing, error) {
ipldPayload, ok := payload.(ConvertedPayload)
if !ok {
return nil, fmt.Errorf("btc publisher expected payload type %T got %T", ConvertedPayload{}, payload)
}
// Generate the iplds
headerNode, txNodes, txTrieNodes, err := ipld.FromHeaderAndTxs(ipldPayload.Header, ipldPayload.Txs)
if err != nil {
return nil, err
}
// Begin new db tx
tx, err := pub.indexer.db.Beginx()
if err != nil {
return nil, err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
// Publish trie nodes
for _, node := range txTrieNodes {
if err := shared.PublishIPLD(tx, node); err != nil {
return nil, err
}
}
// Publish and index header
if err := shared.PublishIPLD(tx, headerNode); err != nil {
return nil, err
}
header := HeaderModel{
CID: headerNode.Cid().String(),
ParentHash: ipldPayload.Header.PrevBlock.String(),
BlockNumber: strconv.Itoa(int(ipldPayload.BlockPayload.BlockHeight)),
BlockHash: ipldPayload.Header.BlockHash().String(),
Timestamp: ipldPayload.Header.Timestamp.UnixNano(),
Bits: ipldPayload.Header.Bits,
}
headerID, err := pub.indexer.indexHeaderCID(tx, header)
if err != nil {
return nil, err
}
// Publish and index txs
for i, txNode := range txNodes {
if err := shared.PublishIPLD(tx, txNode); err != nil {
return nil, err
}
txModel := ipldPayload.TxMetaData[i]
txModel.CID = txNode.Cid().String()
txID, err := pub.indexer.indexTransactionCID(tx, txModel, headerID)
if err != nil {
return nil, err
}
for _, input := range txModel.TxInputs {
if err := pub.indexer.indexTxInput(tx, input, txID); err != nil {
return nil, err
}
}
for _, output := range txModel.TxOutputs {
if err := pub.indexer.indexTxOutput(tx, output, txID); err != nil {
return nil, err
}
}
}
// This IPLDPublisher does both publishing and indexing, we do not need to pass anything forward to the indexer
return nil, err
}
// Index satisfies the shared.CIDIndexer interface
func (pub *IPLDPublisherAndIndexer) Index(cids shared.CIDsForIndexing) error {
return nil
}