prysm-pulse/tools/interop/export-genesis/main.go
Preston Van Loon 4b033f4cc7
Update go to 1.19.3 (#11630)
* Update go to 1.19.3

* Update other items to 1.19

* Update golangci-lint to latest release

* Run gofmt -s with go1.19

* Huge gofmt changes

Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
2022-11-18 19:12:19 +00:00

49 lines
1012 B
Go

package main
import (
"context"
"fmt"
"os"
"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
"github.com/prysmaticlabs/prysm/v3/io/file"
)
// A basic tool to extract genesis.ssz from existing beaconchain.db.
// ex:
//
// bazel run //tools/interop/export-genesis:export-genesis -- /tmp/data/beaconchaindata /tmp/genesis.ssz
func main() {
if len(os.Args) < 3 {
fmt.Println("Usage: ./main /path/to/datadir /path/to/output/genesis.ssz")
os.Exit(1)
}
fmt.Printf("Reading db at %s and writing ssz output to %s.\n", os.Args[1], os.Args[2])
d, err := db.NewDB(context.Background(), os.Args[1])
if err != nil {
panic(err)
}
defer func() {
if err := d.Close(); err != nil {
panic(err)
}
}()
gs, err := d.GenesisState(context.Background())
if err != nil {
panic(err)
}
if gs == nil || gs.IsNil() {
panic("nil genesis state")
}
b, err := gs.MarshalSSZ()
if err != nil {
panic(err)
}
if err := file.WriteFile(os.Args[2], b); err != nil {
panic(err)
}
fmt.Println("done")
}