Add block_identifier example

ethereum · Feb 11, 2019 · b5de1a3 · b5de1a3
1 parent 6844214
commit b5de1a3
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/docs/contracts.rst b/docs/contracts.rst
@@ -783,7 +783,8 @@ It can also be invoked using parentheses:
    >>> twentyone
    21
 
-And a transaction dictionary, with or without the ``transaction`` keyword. For example:
+And a transaction dictionary, with or without the ``transaction`` keyword.
+You can also optionally include a block identifier. For example:
 
 .. doctest::
 
@@ -794,6 +795,9 @@ And a transaction dictionary, with or without the ``transaction`` keyword. For e
    >>> twentyone = myContract.caller(transaction={'from': from_address}).multiply7(3)
    >>> twentyone
    21
+   >>> twentyone = myContract.caller(block_identifier='latest').multiply7(3)
+   >>> twentyone
+   21
 
 Like :py:class:`ContractFunction`, :py:class:`ContractCaller`
 provides methods to interact with contract functions.