130 lines
3.9 KiB
Go
130 lines
3.9 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 shared
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import (
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"bytes"
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"github.com/vulcanize/ipfs-blockchain-watcher/pkg/ipfs/ipld"
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"github.com/ipfs/go-cid"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ipfs/go-ipfs-blockstore"
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"github.com/ipfs/go-ipfs-ds-help"
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node "github.com/ipfs/go-ipld-format"
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"github.com/jmoiron/sqlx"
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"github.com/sirupsen/logrus"
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"github.com/vulcanize/ipfs-blockchain-watcher/pkg/ipfs"
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)
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// ListContainsString used to check if a list of strings contains a particular string
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func ListContainsString(sss []string, s string) bool {
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for _, str := range sss {
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if s == str {
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return true
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}
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}
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return false
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}
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// IPLDsContainBytes used to check if a list of strings contains a particular string
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func IPLDsContainBytes(iplds []ipfs.BlockModel, b []byte) bool {
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for _, ipld := range iplds {
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if bytes.Equal(ipld.Data, b) {
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return true
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}
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}
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return false
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}
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// ListContainsGap used to check if a list of Gaps contains a particular Gap
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func ListContainsGap(gapList []Gap, gap Gap) bool {
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for _, listGap := range gapList {
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if listGap == gap {
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return true
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}
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}
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return false
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}
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// HandleNullAddrPointer will return an emtpy string for a nil address pointer
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func HandleNullAddrPointer(to *common.Address) string {
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if to == nil {
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return ""
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}
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return to.Hex()
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}
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// HandleNullAddr will return an empty string for a a null address
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func HandleNullAddr(to common.Address) string {
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if to.Hex() == "0x0000000000000000000000000000000000000000" {
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return ""
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}
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return to.Hex()
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}
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// Rollback sql transaction and log any error
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func Rollback(tx *sqlx.Tx) {
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if err := tx.Rollback(); err != nil {
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logrus.Error(err)
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}
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}
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// PublishIPLD is used to insert an ipld into Postgres blockstore with the provided tx
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func PublishIPLD(tx *sqlx.Tx, i node.Node) error {
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dbKey := dshelp.MultihashToDsKey(i.Cid().Hash())
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prefixedKey := blockstore.BlockPrefix.String() + dbKey.String()
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raw := i.RawData()
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_, err := tx.Exec(`INSERT INTO public.blocks (key, data) VALUES ($1, $2) ON CONFLICT (key) DO NOTHING`, prefixedKey, raw)
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return err
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}
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// FetchIPLD is used to retrieve an ipld from Postgres blockstore with the provided tx
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func FetchIPLD(tx *sqlx.Tx, cid string) ([]byte, error) {
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mhKey, err := MultihashKeyFromCIDString(cid)
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if err != nil {
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return nil, err
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}
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pgStr := `SELECT data FROM public.blocks WHERE key = $1`
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var block []byte
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return block, tx.Get(&block, pgStr, mhKey)
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}
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// MultihashKeyFromCIDString converts a cid string into a blockstore-prefixed multihash db key string
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func MultihashKeyFromCIDString(c string) (string, error) {
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dc, err := cid.Decode(c)
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if err != nil {
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return "", err
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}
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dbKey := dshelp.MultihashToDsKey(dc.Hash())
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return blockstore.BlockPrefix.String() + dbKey.String(), nil
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}
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// PublishRaw derives a cid from raw bytes and provided codec and multihash type, and writes it to the db tx
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func PublishRaw(tx *sqlx.Tx, codec, mh uint64, raw []byte) (string, error) {
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c, err := ipld.RawdataToCid(codec, raw, mh)
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if err != nil {
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return "", err
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}
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dbKey := dshelp.MultihashToDsKey(c.Hash())
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prefixedKey := blockstore.BlockPrefix.String() + dbKey.String()
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_, err = tx.Exec(`INSERT INTO public.blocks (key, data) VALUES ($1, $2) ON CONFLICT (key) DO NOTHING`, prefixedKey, raw)
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return c.String(), err
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}
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