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Remove initialisation of contract with wei FAQ item

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Chris Ward 2019-01-28 14:26:21 +01:00 committed by Erik Kundt
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docs/frequently-asked-questions.rst
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Frequently Asked Questions
###########################
This list was originally compiled by `fivedogit <mailto:fivedogit@gmail.com>`_.
******************
Advanced Questions
******************
How do I initialize a contract with only a specific amount of wei?
==================================================================
Currently the approach is a little ugly, but there is little that can be done to improve it.
In the case of a ``contract A`` calling a new instance of ``contract B``, parentheses have to be used around
``new B`` because ``B.value`` would refer to a member of ``B`` called ``value``.
You will need to make sure that you have both contracts aware of each other's presence and that ``contract B`` has a ``payable`` constructor.
In this example::
pragma solidity ^0.5.0;
contract B {
constructor() public payable {}
}
contract A {
B child;
function test() public {
child = (new B).value(10)(); //construct a new B with 10 wei
}
}
More Questions?
===============
If you have more questions or your question is not answered here, please talk to us on
If your question is not answered here, please talk to us on
`gitter <https://gitter.im/ethereum/solidity>`_ or file an `issue <https://github.com/ethereum/solidity/issues>`_.