Change Chain.block_hash to return option(hash)

2019-06-27 14:19:39 +02:00
parent 502a4e6464
commit a617a6469d
5 changed files with 12 additions and 5 deletions
@@ -50,7 +50,7 @@ contract Environment =
  function get_balance(acct : address) : int = Chain.balance(acct)

  // Block hash
-  function block_hash(height : int) : int = Chain.block_hash(height)
+  function block_hash(height : int) : option(hash) = Chain.block_hash(height)

  // Coinbase
  function coinbase() : address = Chain.coinbase