3. Share Improve this answer Follow answered Dec 31, 2021 at 12:30 Theo Dale 175 8 Add a restricted function to change the base. For example: This is your NFT contract: // Import the ERC20 Token contract import "./ERC20.sol"; contract NFT is ERC721URIStorage { using Counters for . MyContract is the ERC721 Interface (type) located at the address. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI, This contract does not implement all functions and thus cannot be created. This is easy and actually the recommended way to interact with deployed contracts. Plot a one variable function with different values for parameters? The signature of the method is the first 4 bytes of the method name and the types of its parameters: More information about .call, .callcode, .delegatecall. How a top-ranked engineering school reimagined CS curriculum (Ep. I have added the address public owner to contract A. Tools include reporting, alerts, analytics, and application monitoring. Thanks for your reply @JulissaDC. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Is it the same as the one you get when you compile the contract? And "Machine" has calculateResult , user for saving add result and who called this function each. external On the Ethereum Blockchain, each and everyone on the network has a copy of the data and smart contracts. This makes it a time consuming and complicated process. NebulaGods_Contract | Address And what foo is saved to storage means that the value of foo is permanently recorded to states. I added way to connect with a deployed Base to my original answer, along with some other concerns I omitted intentionally. It still has Storage as field and addValuesWithDelegateCall , addValuesWithCall in addition to test how storage would be changed. In that case those cases dont work because your NFT contract does not inherits from ERC20 so the only places you can use those functions is where you declared instances of the ERC20 contract. What is the best way to accomplish this? Limiting the number of "Instance on Points" in the Viewport, "Signpost" puzzle from Tatham's collection. You were right @Julissa. Monitor transactions with request explorer, request sandbox, mempool visualizer. There has been a lot of effort done in this space but is still controversial at the time of writing. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. You might want to know the address of the Base: It would be good practice to add event emitters to the state-changing functions in both contracts. Literature about the category of finitary monads. how to read a variable from an already deployed smartcontract without a predeclared getter function? Solidity: contract calling another contract and addresses are different, why? And this is our target contract Calculator. In Solidity, for this purpose, there are several ways to achieve this goal. 565), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. For example what would happen if the reused contracts are faulty (just like what happened to parity multi-sig wallet hack)? How many arguments can the brackets take and what do they mean? If you do not wish to specify any license type, you can use a special value UNLICENSED or simply skip the whole comment (it wont result in an error, just a warning). Sure. This page is not being translated. Is it the same as the one you get when you compile the contract? How to Call Another Contract Using Solidity - alchemy.com Lets say we have deployed a very simple contract called Deployed that allows user to set a variable.