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-rw-r--r--eth/api_tracer.go3
1 files changed, 3 insertions, 0 deletions
diff --git a/eth/api_tracer.go b/eth/api_tracer.go
index 722e2a6e3..704a6cdba 100644
--- a/eth/api_tracer.go
+++ b/eth/api_tracer.go
@@ -119,6 +119,9 @@ func (api *PrivateDebugAPI) TraceChain(ctx context.Context, start, end rpc.Block
if to == nil {
return nil, fmt.Errorf("end block #%d not found", end)
}
+ if from.Number().Cmp(to.Number()) >= 0 {
+ return nil, fmt.Errorf("end block (#%d) needs to come after start block (#%d)", end, start)
+ }
return api.traceChain(ctx, from, to, config)
}