core: unon fast sync completion wait for governance to be initialized…

… in order to calculate rewards distribution correctly

core/blockchain.go

@@ -40,6 +40,7 @@ import (
  "github.com/ethereum/go-ethereum/ethdb"
  "github.com/ethereum/go-ethereum/event"
  "github.com/ethereum/go-ethereum/log"
+ metaminer "github.com/ethereum/go-ethereum/metadium/miner"
  "github.com/ethereum/go-ethereum/metrics"
  "github.com/ethereum/go-ethereum/params"
  "github.com/ethereum/go-ethereum/rlp"
@@ -1837,6 +1838,18 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, er
  if err != nil {
  return it.index, err
  }
+
+ if !metaminer.IsPoW() {
+ // make sure the previous block exists in order to calculate rewards distribution
+ for {
+ if _, _, err := metaminer.CalculateRewards(
+ block.Number(), big.NewInt(0), big.NewInt(100000000), nil); err == nil {
+ break
+ }
+ time.Sleep(100 * time.Millisecond)
+ }
+ }
+
  // Enable prefetching to pull in trie node paths while processing transactions
  statedb.StartPrefetcher("chain")
  activeState = statedb