Proposal for read only calls

[leviadam]

Preamble

EIP: <to be assigned>
Title: Proposal for read only calls
Author: Adam Levi, leviadam@gmail.com
Type: Standard Track
Category: Core
Status: Draft
Created: 2017-08-25

Abstract

A contract will have the option to call another contract, asserting that the internal call will not change the state.

Motivation

We are now transforming from systems that were mostly single-contract, to complex systems composed of multiple contracts. In many cases a contract would like to make a call to another contract introduced by an agent, based on some standard. This can have many security risks.
In many cases, the calling contract only wants to read data from the called contract. It could be much better, security wise, if one could make such a call.
The only solution today is maybe to limit the gas, but I do not think it answers the need.

Backwards Compatibility

Yes.

Implementation

NA

Copyright

Copyright and related rights waived via CC0.

Any feedback will be much appreciated.

[axic]

You should check out #214 and #195.

[leviadam]

Thank you, @axic. If think STATIC_CALL is very much answering the need.
I'm not sure though that I understand where on the pipeline this proposal is.

[holgerd77]

Guess this can be closed now?

[leviadam]

Yes, thank you!