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Questions tagged [presale]

the sale of tokens prior to the official launch of an Initial Coin Offering (ICO)

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2 answers
325 views

Is their a way to claim a pre-sales token using different wallet from the one used when buying it during pre-sales?

I am a crypto newbie, and participated in a pre-sales. However, the Zengo wallet I used when buying pre-sales token does not support the token. Is their a way to recover the token I bought. I did not ...
0 votes
1 answer
2k views

Warning! Error encountered during contract execution: out of gas

On BSC Testnet I have deployed a token contract https://testnet.bscscan.com/address/0xE5bB5e6Cf65dBE0062d1EBa9e36e64F89e3f0638 And also a TokenSale contract https://testnet.bscscan.com/address/...
0 votes
1 answer
87 views

"message":"execution reverted: arithmetic underflow or overflow"

constructor( address[] memory setupAddys, uint256 _totalTokensForSale, uint256 _softCap, uint256[] memory _Participation, uint256[] memory _Times, uint256 _lpPercentage, ...
1 vote
0 answers
22 views

Ether Presale json file extracting different ethereum address

I bought Ethereum using three wallets and was able to access two of them, but I can't access the last one. When I opened the third JSON file, I could see the Ether address. I also checked on Etherscan ...
0 votes
3 answers
527 views

ApproveUSDT function not working internally, how do I fix this?

I’m experimenting with a presale contract based on the BSC testnet, and in the contract I’m attempting to achieve the purchase of my token with USDT. Using my own code within the contract itself, I ...
0 votes
0 answers
19 views

Is everything okay with this Presale contract?

Could you help me check if this presale contract does what it's supposed to do and if it's safe? I tried to find bugs or flaws but couldn't find anything. The theory is very simple: the user can use ...
1 vote
0 answers
11 views

Tracking total sold not total supply?

I am setting up a pre sale contract, it enables users to purchase the tokens via a prelaunch which they are distributed from the owners (our contract owners) wallet when a user buys them. How are ...
0 votes
0 answers
25 views

Fail with error 'Incorrect Ether amount'

I am trying to set up a very basic presale using Remix IDE. 0x96AAC35C248C48418eF9A939e3eB8b9a64207532 --> Presale Contract 0xF60EeA9ab4B520846CA01D368A08cD4b71B619f8 --> Token itself This is ...
0 votes
0 answers
59 views

Presale contract - Cant send tokens to the contract

I have created a token and a presale contract on remix. User should be able to send BNB to the presale contract and receive the token in their wallet, but when i try to send funds to PRESALE contract ...
0 votes
2 answers
86 views

How to implement tiered token price in ICO

I have a question of tiered token price during ICO presale. Here is the Fightout presale segmant. As you can notice, after time passed, the token price raised. I understand presale contract need to ...
0 votes
0 answers
49 views

Tips for creating a liquidity pool in Pancake Swap

dear friends I need the advice of my dear professional friends on this site in several areas, please advise and guide me in all areas. The first part is, what is the best strategy for financing a ...
1 vote
1 answer
315 views

ICO Token sale payment process

How can one start selling their coins on their custom website for ETH and Bitcoin? I was checking bunnytoken.com, they have very simple payment process script, which includes referral solution. ...
0 votes
0 answers
76 views

How to implement Referral/Affiliate program in ICO presale?

We are developing a ICO presale site and want to integrate referral program into our project. After checking some presale sites, we found they are using youpromote.care as below. https://bs_c7b6c438....
-1 votes
1 answer
23 views

regarding the access of funds during an ongoing token presale of my token

we are planning a token presale for our crypto token with all the specific requirements but we are unclear about the control of funds raised while an presale is still live. can anyone please clarify ...
0 votes
2 answers
43 views

ICO Site Development, When should I transfer tokens to investors

I am trying to develop ICO presale site and researched various ICO contracts on github. I am now stuck because I can't know when I should transfer tokens to investors. Someone wrote buyTokens ...
1 vote
1 answer
266 views

Sell function but with accepting only another erc20 token, not eth

I want to sell my token (PRO TOKEN) to users in my presale, but I dont want people to send ETH or any other crypto to buy from my smart contract. I want people to buy my PRO TOKEN by sending ...
1 vote
1 answer
444 views

Ethereum Presale Wallet [duplicate]

I have the json file and the password. Is Go Ethereum the only option for import and updating the wallet? I am no programmer. I jump on board with Ethereum because it is, I believe, the only way ...
0 votes
1 answer
16 views

Mınt Gas Fee Problem

We have started the Mint sale of our new collection on Ethereum, but we cannot solve the gas fee problem. There is an unbelievably high gas fee. What should we do? Did we do something wrong in the ...
0 votes
1 answer
45 views

ERC20 TRANSFER function error error = false transaction [duplicate]

Want to use erc20 function transfer to transfer erc20 Made contract referring this video https://youtu.be/-5j6Ho0Bkfk function transfererc()payable public{ Token token = Token(address); token....
1 vote
1 answer
34 views

what is the unit in ICO?

It is a bit a silly question I am trying to understand what the amount of coins are sold in ICO, let's say, someone has minted 10 coins whose decimal are 3, which means someone has 10.000 (10 *10^3). ...
1 vote
1 answer
2k views

Call a specific function in a contract at a specific block

First of all I just started to tip my toes into smart contact development, so sorry if my question is not properly asked. I want to participate in a pre-sale and to ensure my place I want to call the ...
0 votes
1 answer
249 views

ETH transactions to presale contract keep failing

I'm trying to send some ETH to a presale smart contract on Kovan. Allowance has been set with presale address as a spender - with the exact same amount as the tokens allocated in the presale contract. ...
2 votes
2 answers
5k views

Minting Tokens and OnlyOwner - ERC20

I have created a contract based on a standard one to mint and I have code as follows - modifier canMint() { require(!mintingFinished); _; } /** * Function to mint tokens * @...
0 votes
0 answers
100 views

EndSale function in Solidity fails

I have the following solidity code: pragma solidity ^0.6.0; import "./DappToken.sol"; contract DappTokenSale { address payable public admin; DappToken public tokenContract; ...
3 votes
1 answer
522 views

Need to prove quantity/date of Ether Pre-Sale purchase for tax reasons

Lucky me - I bought 10000 Ether for 5BTC in the pre-sale and forgot about them until just recently. Yahoo! However, now that I've sold some at a profit I'm going to need to prove the date and quantity ...
1 vote
0 answers
156 views

ETH 2.0 but I have yet to claim my ETH from presale

Had to deal with life and lost track of ETH after the crash. I have yet to claim my ETH presale and wanted to know with all the forks and now ETH 2.0, can someone go over the best way to claim my ETH ...
2 votes
1 answer
539 views

Token distribution and Smart Contract [closed]

Might be this is the common question asked! , but still i have lots of confusion over here, As far as my knowledge all the tokens are released from Smart contract, so my question are : For every Pre-...
1 vote
0 answers
218 views

Pre-Sale receives error: Canceled - Warning! Error encountered during contract execution [execution reverted]

I have 2 contracts The first one cretes a token contract The second creates pre-sale contract Pre-sale contract created with 0.5 eth for paying for gas When trying to send 0.5 ethereum to pre-sale ...
0 votes
1 answer
96 views

What does this following entity exactly means in this PolyMath contract?

Here I've added code snippet which is I'm learning right now. The following terms/ entities/ variable are not understandable why exactly it means and why it is used. - Founder, Advisor, Bonus1/2/3, ...
2 votes
2 answers
846 views

ERC20 Presale Contract and Data Field

I am creating a presale for a new ERC20 token. I have seen various methods and I would like more details about the data field. Example 1. Bitjob Address: ...
2 votes
1 answer
291 views

GUI Ethereum just closes and does not import presale JSON wallet

When I try to import presale JSON wallet using the Ethereum GUI just closes (Kind of crashes) and does not import, has anyone seen this? It appears the password is good I have checked the eth address ...
0 votes
1 answer
126 views

Smart contract function throwing error in remix

I am writing a PreICO Smart contract. I got a code snippet which I am trying to understand. I am stuck in function buyXYZTokens function which is throwing error. Here is the code snippet: Contract ...
1 vote
1 answer
340 views

Best practice in 2018 to claim Ethereum presale purchase [duplicate]

I have the presale wallet and password, but went through a number of trials and just now trying to get back on my feet. I have yet to claim my presale and could really use it to help with medical ...
4 votes
0 answers
504 views

How can I use a Presale JSON file to keep my ETH long-term in cold storage and sell my ETC seperately?

I received Ether during the Pre-sale in June 2014 and received a JSON file and have the password. I have never tried to access these funds. I found out that I should have ETC & ETH due to the hard-...
1 vote
0 answers
273 views

How to better design pre sale and sale staged smart contracts [closed]

I am planning to create a stage based smart contract, like a pre-sale contract and then first and second stage of sales. What is best idea to do? Shall we create everything in one contract or multiple ...
5 votes
2 answers
786 views

Where to find ICO contract with linear / logarithmic decrease?

I had a look at some existing crowdsale contracts: https://github.com/aragon/aragon-network-token/blob/master/contracts/AragonTokenSale.sol https://github.com/sonm-io/presale-token/blob/master/...
1 vote
0 answers
636 views

How to mint tokens before crowdsale

I want to make a crowdsale with pre-ICO and ICO, so people can swap tokens directly by sending to the smart-contract. The pre-Ico should have a certain rate for the swap and the ICO should have a ...
0 votes
1 answer
928 views

Can I use money raised from Pre-ICO before start the ICO?

I was reading this article Most serious projects have some sort of pre-ICO funding to finance the marketing costs linked to the launch of an ICO. I thought this funds (Pre-ICO funds collected ) ...
1 vote
1 answer
509 views

How to create a different contract for private and ICO?

Is it possible that the Total supply is created at the time of creation of token for Privete-sale and then create an ICO contract for the Unsold tokens to sell them on crowdsale? (i.e. It is hard to ...
0 votes
2 answers
433 views

sending messages to a contract using geth

I have a working system for minting tokens and transferring them as follows - > addrtoken.balanceOf(eth.accounts[0]) 33333250 > addrtoken.balanceOf(eth.accounts[1]) 50 I want to test the ...
0 votes
1 answer
53 views

Why pre ico sites have login pages

I have seen many pre ico sites needs a login page to be created . Would like to know why is that created and where do they store the information ?
21 votes
5 answers
13k views

How do I import my presale wallet?

I purchased ether during the presale. Is there an easy way to import those ether and start using them?
1 vote
0 answers
118 views

Will ethereum.org re-send a presale json wallet if I lost my original and never moved the coins?

Bought some ether in the presale, received a pdf receipt with my password, transaction id, and future ETH address, but I never did anything with it, never even looked at it again, until now. I ...
0 votes
1 answer
223 views

Moved presale ether after the fork how do I split?

I bought ether at the presale and moved it to another address after the fork. I still have the original wallet backup, but I'm uncertian on the process to claim ETC. When I scan my Address on Ethereum ...
1 vote
1 answer
124 views

Can I find out ethereum address?

I bought ethereum from the presale. I have a presale wallet and I do not know the password. Is there a way I can find out the address?
3 votes
1 answer
1k views

Why does mist block importing accounts when a geth node is already running?

I have run into this issue. The cause is described in that thread, but not explained. If I run mist and let it launch its own node, then the Accounts>Import menu item is available. If I run geth ...
2 votes
1 answer
128 views

Cannot load pre-sale Ethereum into Wallet

I purchased pre-sale Ether and stayed on the sidelines until today. I downloaded the Win64 wallet installer from GitHub and installed on Windows 10. It's running and syncing to the network. It has a ...
1 vote
0 answers
106 views

Precautions before using a pre-sale address?

After the Ethereum pre-sale I've been pretty much out of the loop. Now I would like to start using my ETH but I'm not sure if it's that straightforward. I would not like to mess up and lose ETH ...
7 votes
1 answer
3k views

What does presale mean in Ethereum?

I have seen a lot of discussions about presale wallets, but have no idea what it means. What do the terms "presale" and "presale wallet" mean in Ethereum?
1 vote
1 answer
591 views

Presale wallet gives zero funds

I have already asked this question but I post once again as helpdesk people at ethereum are asking to post here: After several years of waiting, I have decided to check how much ether I do have in my ...