Questions tagged [crowdsale]

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11 votes
1 answer
2k views

Is it possible to create ICO crowdsale seamlessly accepting multiple assets?

Most of the ICO crowdsales accept ETH only. Some accept BTC. Very few accept other assets. I was thinking about creating crowdsale that would accept as many assets as possible. While creating, ...
7 votes
3 answers
5k views

Error encountered, bailing. Network state unknown. Review successful transactions manually

Problem I get the following error after running $ truffle migrate --reset: Running migration: 1_initial_migration.js Replacing Migrations... ... ...
  • 311
1 vote
2 answers
545 views

ICO crowdsale without smart contract

I see that there are some ICO who collect ETH without smart contract and would like to know the negatives and positives for such decision. Thank you
  • 13
9 votes
0 answers
1k views

Pre ico and ico crowdsale contracts [closed]

Can you please recommend the best way to organize pre-ICO and ICO using Etherium smart contracts. I have found two options: 1) To make 2 different contracts and after ICO merge them (pre-ICO with ...
2 votes
1 answer
852 views

Contract final touches. Problem with CappedCrowdsale

I am finalizing this basic but clean Crowdsale code. However, there is ParserError with "contract Cappedcrowdsale". Why? It does refer to Crowdsale though. Please check if this is a legit Smart ...
1 vote
2 answers
1k views

How to give opening and closing time for contract in remix

I have implemented a timed crowdsale contract and it's constructor is like this: function NeoCrowdsale(uint256 _openingTime, uint256 _closingTime) public { require(_openingTime >= now); ...
6 votes
3 answers
1k views

how to setup multicurrency ICO / Crowdsale

I'm having difficulty finding information on how to setup a contract that accepts multi-currency like bitcoin, wave, ripple, etc. And also looking for a solution to distribute my tokens to these ...
  • 807
3 votes
1 answer
1k views

If a contract's function calls a function of another contract within it, is the address of the contract the msg.sender?

For example, a crowdsale contract has a function that creates an ERC20 token called "token" using a token contract that is already defined further up in the code being deployed. The constructor ...
2 votes
1 answer
1k views

Is it possible to divide my crowdsale contract into multiple files in order to solve gas issue?

I'm trying to deploy a crowdsale contract, which is using open zeppelin, on ropsten network but I got gas related error. The error says "please check your gas amount". How can I solve it? I think this ...
  • 1,433
1 vote
1 answer
576 views

Implementation of an Allowance Crowdsale. Token Interface / _prevalidatePurchase-/_delivertokens-function

I am new to solidity coding and after I created some basic contracts as well as a ERC20 token contract I wanted to create a crowdsale contract. Now I am stuck and I have a question regarding the ...
  • 61
0 votes
1 answer
673 views

Crowdsale Tokens

Saw your question about holding of tokens in a crowdsale, and now see its better that ICO contract holds all the tokens. Appreciate your help. How do I allocate all the tokens in owners wallet to the ...
0 votes
1 answer
716 views

Can someone explein me this Multi mint function (Solidity)?

I came accross this function to mint token for a crowdsale but I don't understand the meaning of the bit shift operations and what bit array should represent.. what is this code doing ? The code can ...
0 votes
1 answer
351 views

Mist - Rinkeby Test Net - No Longer Sending Confirmations

Im sure this is a very simple problem that one of the brilliant geniuses on this site should be able to answer! I have been testing a sample crowdsale using the Tutorials on https://ethereum.org/...