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eth: Fix #3483

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This commit is contained in:
Shbli 2017-12-27 17:06:19 +03:00
parent 9d187f0238
commit 0bba5ff394
1 changed files with 5 additions and 0 deletions
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5
eth/api_backend.go
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@ -20,6 +20,7 @@ import (
"context"
"math/big"
"errors"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
@ -90,6 +91,10 @@ func (b *EthApiBackend) StateAndHeaderByNumber(ctx context.Context, blockNr rpc.
// Otherwise resolve the block number and return its state
header, err := b.HeaderByNumber(ctx, blockNr)
if header == nil || err != nil {
//if the error is nil, let's create a generic error message instead of returning a fully null result
if err == nil {
err = errors.New("blockchain header is nil")
}
return nil, nil, err
}
stateDb, err := b.eth.BlockChain().StateAt(header.Root)