<!--
{
  "availability" : [

  ],
  "documentType" : "symbol",
  "framework" : "BitcoinKernel",
  "identifier" : "/documentation/BitcoinKernel/Warning/largeWorkInvalidChain",
  "metadataVersion" : "0.1.0",
  "role" : "Case",
  "symbol" : {
    "kind" : "Case",
    "modules" : [
      "BitcoinKernel"
    ],
    "preciseIdentifier" : "s:13BitcoinKernel7WarningO21largeWorkInvalidChainyA2CmF"
  },
  "title" : "Warning.largeWorkInvalidChain"
}
-->

# Warning.largeWorkInvalidChain

A competing chain with substantial proof-of-work but containing
an invalid block has been detected. Usually indicates an attack
or a peer running non-consensus code; review network peer list.

```
case largeWorkInvalidChain
```