I want to create a crowdsale token contract similar to EOS. I am new to crowdsale token contract. I get the source code from etherscan.io. They are EOSTokenContract, EOSCrowdsale, EOS-Owner. I want to know how did they deployed their smart contract. Through truffle? or what kind of framework to deploy their smart contract.
Can i deploy a similar crowdsale contract using those three files?
My suggestion is to take a look to OpenZeppelin, they provide a good library to develop Smart Contracts, with good tutorials and guides and a specific focus on crowdsale contracts.
You can start from their basic example "How To Create Token and Initial Coin Offering Contracts Using Truffle + OpenZeppelin"
In EOS contract is written in C++ language while in ethereum in solidity. SO you can't deploy using truffle because it's not yet developed for EOS.
Related
Is there and example contract on NEAR testnet which I can call to understand the workflow?
All tutorials show how to create a smart contract but I do not want to create one, instead I want to call a function on a smart contract for learning purposes.
I have my ERC1155 token contract deployed on Ethereum network
i want my token holders to make the token to 721 standard and burn the old tokens
how can i achieve that using a proxy contract
need some proper direction on this , thanks
So looking to migrate the OpenSea ERC1155 tokens to the new ERC721 tokens. The existing contract has 135 tokens.
a proxy contract won't let you do this migration for a couple of reasons, first a proxy contract just let you update the address of the contract where the actual logic is, but it has some limitations, like that the proxy contract should be deployed from the beginning you can't just deploy a proxy an expect that it changes or modify an existing contract, but let's say you have an upgreadable erc1155, for the limitation of the proxy you will probably have a lot of problems doing this update, because you can't change the way that the variables are defined or stored, you can't delete any existing function (you can leave it empty instead),and other things
probably you will need to deploy a new contract that will be the erc721, then you will have to make another contract that makes the swap, receive a token from the old contract and gives the token of the new contract, is on you how the contract will get the new tokens if it will mint the tokens or if it will have it, also you have to considere what you will do with the old tokens because if the old contract do not let the tokens to be burned you can't, but you could lock it in the same contract or something similar that is almost the same as burning it
I created/fork a bep20 token, if finishes successfully & contract fully created.
But i cant see the token or anything related to the token in the contract. the only thing visible are the contract address, transaction hash. e.t.c. you can check the link below to verify my words.
https://bscscan.com/tx/0xc61a353504deca41bdfb46b199f91adedd2bbd19f5ddae29ba54122a71e68c3f
As the contract detail page says, you deployed the library Address - not the contract SafeMoon that you probably wanted to deploy.
Since you're deploying the contract using Remix, you need to select the correct contract in the Deploy tab.
I want a solidity contract to compile and deploy in remix.ethereum
the contract code I used brings always errors!
Error message:
This contract may be abstract, not implement an abstract parent’s methods completely or not invoke an inherited contract’s constructor correctly.
I want to use a new contract to verify and publish my tokens.
can you help me pls with a new contract that works with a remix and verifying etherscan?
regards
Based on the error message, you are trying to deploy the ERC20Interface instead of the contract x.
The solution is simple in Remix: Chose the correct contract to deploy from the selectbox.
I have been working on ERC20 token development. My code is written using solidity and zeppelin frameworks.
So far I have used the test networks like Rinkeby, Ropsten to deploy and test all the ERC20 methods. Last night, I have to deploy the smart contract in the mainnet where 10000000 tokens had to be deployed but I deployed only 1000000 (missed a zero).
As it is deployed in the mainnet, mint is the only way to top up the initial amount instead of redeploying. Mint is achievable using remix by removing the internal keyword in the mint method. But it requires to redeploy the smart contract in order to use mint method, which customer would not agree to redo the same.
The only way I think is to use web3js API to achieve the same. But there are no content given in the web3js document to how to pragmatically mint (to top up the initial amount).
If any of you have faced a similar situation, please let me know how you tackled it.
Thanks,
Sriram
The mint using web3 would be just a call to the contract function just like from remix, nothing special. All you would have to do would be to call the function. But since this function internal you cannot call it directly not from remix, not from web3, not from any other library. To put it simply if you cannot call the function from remix you cannot do it from web3 either. Web3 offers nothing more than remix in terms access rights to the contract.