plugeth-statediff/indexer/constructor.go

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// VulcanizeDB
// Copyright © 2021 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 indexer
import (
"context"
"fmt"
"github.com/cerc-io/plugeth-statediff/utils/log"
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"github.com/ethereum/go-ethereum/params"
"github.com/cerc-io/plugeth-statediff/indexer/database/dump"
"github.com/cerc-io/plugeth-statediff/indexer/database/file"
"github.com/cerc-io/plugeth-statediff/indexer/database/sql"
"github.com/cerc-io/plugeth-statediff/indexer/database/sql/postgres"
"github.com/cerc-io/plugeth-statediff/indexer/interfaces"
"github.com/cerc-io/plugeth-statediff/indexer/node"
"github.com/cerc-io/plugeth-statediff/indexer/shared"
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)
// NewStateDiffIndexer creates and returns an implementation of the StateDiffIndexer interface.
// The returned indexer is used to process state diffs and write them to a database.
// The returned SQL database, if non-nil, is the indexer's backing database.
// `ctx` is used to cancel an underlying DB connection.
// `chainConfig` is used when processing chain state.
// `nodeInfo` contains metadata on the Ethereum node, which is inserted with the indexed state.
// `config` contains configuration specific to the indexer.
// `isDiff` means to mark state nodes as belonging to an incremental diff, as opposed to a full snapshot.
func NewStateDiffIndexer(
ctx context.Context,
chainConfig *params.ChainConfig,
nodeInfo node.Info,
config interfaces.Config,
isDiff bool,
) (
sql.Database,
interfaces.StateDiffIndexer,
error,
) {
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switch config.Type() {
case shared.FILE:
log.Info("Starting statediff service in SQL file writing mode")
fc, ok := config.(file.Config)
if !ok {
return nil, nil, fmt.Errorf("file config is not the correct type: got %T, expected %T", config, file.Config{})
}
ind, err := file.NewStateDiffIndexer(chainConfig, fc, nodeInfo, isDiff)
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return nil, ind, err
case shared.POSTGRES:
log.Info("Starting statediff service in Postgres writing mode")
pgc, ok := config.(postgres.Config)
if !ok {
return nil, nil, fmt.Errorf("postgres config is not the correct type: got %T, expected %T", config, postgres.Config{})
}
var err error
var driver sql.Driver
switch pgc.Driver {
case postgres.PGX:
driver, err = postgres.NewPGXDriver(ctx, pgc, nodeInfo)
if err != nil {
return nil, nil, err
}
case postgres.SQLX:
driver, err = postgres.NewSQLXDriver(ctx, pgc, nodeInfo)
if err != nil {
return nil, nil, err
}
default:
return nil, nil, fmt.Errorf("unrecognized Postgres driver type: %s", pgc.Driver)
}
db := postgres.NewPostgresDB(driver, pgc.Upsert)
ind, err := sql.NewStateDiffIndexer(ctx, chainConfig, db, isDiff)
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return db, ind, err
case shared.DUMP:
log.Info("Starting statediff service in data dump mode")
dumpc, ok := config.(dump.Config)
if !ok {
return nil, nil, fmt.Errorf("dump config is not the correct type: got %T, expected %T", config, dump.Config{})
}
return nil, dump.NewStateDiffIndexer(chainConfig, dumpc), nil
default:
return nil, nil, fmt.Errorf("unrecognized database type: %s", config.Type())
}
}