prysm-pulse/beacon-chain/core/helpers/genesis.go
terence tsao dfd2cc751c
Refactor helpers for Altair (#9026)
Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
2021-06-11 19:29:50 +00:00

52 lines
1.4 KiB
Go

package helpers
import (
"fmt"
"github.com/pkg/errors"
iface "github.com/prysmaticlabs/prysm/beacon-chain/state/interface"
ethpb "github.com/prysmaticlabs/prysm/proto/eth/v1alpha1"
"github.com/prysmaticlabs/prysm/shared/params"
"github.com/prysmaticlabs/prysm/shared/trieutil"
)
// UpdateGenesisEth1Data updates eth1 data for genesis state.
func UpdateGenesisEth1Data(state iface.BeaconState, deposits []*ethpb.Deposit, eth1Data *ethpb.Eth1Data) (iface.BeaconState, error) {
if eth1Data == nil {
return nil, errors.New("no eth1data provided for genesis state")
}
var leaves [][]byte
for _, deposit := range deposits {
if deposit == nil || deposit.Data == nil {
return nil, fmt.Errorf("nil deposit or deposit with nil data cannot be processed: %v", deposit)
}
hash, err := deposit.Data.HashTreeRoot()
if err != nil {
return nil, err
}
leaves = append(leaves, hash[:])
}
var trie *trieutil.SparseMerkleTrie
var err error
if len(leaves) > 0 {
trie, err = trieutil.GenerateTrieFromItems(leaves, params.BeaconConfig().DepositContractTreeDepth)
if err != nil {
return nil, err
}
} else {
trie, err = trieutil.NewTrie(params.BeaconConfig().DepositContractTreeDepth)
if err != nil {
return nil, err
}
}
depositRoot := trie.Root()
eth1Data.DepositRoot = depositRoot[:]
err = state.SetEth1Data(eth1Data)
if err != nil {
return nil, err
}
return state, nil
}