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| author | Bojie Wu <bojie@dexon.org> | 2018-10-09 13:28:45 +0800 |
|---|---|---|
| committer | Wei-Ning Huang <w@byzantine-lab.io> | 2019-06-12 17:27:17 +0800 |
| commit | 8a247252263a9bcc23830217b0c108b2fdd0b84b (patch) | |
| tree | c208ee7657da1c61ee485a9e4130ed9c54fdfa58 | |
| parent | a69fb3e4c59fab52b6e10993c67400084879b1a8 (diff) | |
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app: fix nil pointer issue
| -rw-r--r-- | dex/app.go | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/dex/app.go b/dex/app.go index 7730ba22f..b924ab620 100644 --- a/dex/app.go +++ b/dex/app.go @@ -129,14 +129,15 @@ func (d *DexconApp) PreparePayload(position coreTypes.Position) (payload []byte, // set state to the pending height var latestState *state.StateDB - if d.lastPendingHeight == 0 { + lastPendingBlock := d.blockchain.GetPendingBlockByHeight(d.lastPendingHeight) + if d.lastPendingHeight == 0 || lastPendingBlock == nil { latestState, err = d.blockchain.State() if err != nil { log.Error("Get current state", "error", err) return nil, fmt.Errorf("get current state error %v", err) } } else { - latestState, err = d.blockchain.StateAt(d.blockchain.GetPendingBlockByHeight(d.lastPendingHeight).Root()) + latestState, err = d.blockchain.StateAt(lastPendingBlock.Root()) if err != nil { log.Error("Get pending state", "error", err) return nil, fmt.Errorf("get pending state error: %v", err) @@ -286,14 +287,15 @@ func (d *DexconApp) VerifyBlock(block *coreTypes.Block) coreTypes.BlockVerifySta // set state to the pending height var latestState *state.StateDB - if d.lastPendingHeight == 0 { + lastPendingBlock := d.blockchain.GetPendingBlockByHeight(d.lastPendingHeight) + if d.lastPendingHeight == 0 || lastPendingBlock == nil { latestState, err = d.blockchain.State() if err != nil { log.Error("Get current state", "error", err) return coreTypes.VerifyInvalidBlock } } else { - latestState, err = d.blockchain.StateAt(d.blockchain.GetPendingBlockByHeight(d.lastPendingHeight).Root()) + latestState, err = d.blockchain.StateAt(lastPendingBlock.Root()) if err != nil { log.Error("Get pending state", "error", err) return coreTypes.VerifyInvalidBlock |