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Questions tagged [ico]

An ICO, or Initial Coin Offering, is the initial offer of sale of a digital token or asset on the blockchain.

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Gas Estimation Error - Simple Token + ICO Project

I am a beginner in Solidity and created a simple token + ico file and am testing the code on Base Sepolia Testnet and am running into a peculiar error. I keep getting Gas Esimation Error on the ...
QuantPhdResearch's user avatar
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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 ...
Jim Mike's user avatar
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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 ...
Ali's user avatar
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Creating an ICO contract

I'm creating a simple ICO contract, it sends the amount of the token bought to the buyer as soon as the contract receives ether, and then sends the received ether to a different wallet, I've been ...
Santos's user avatar
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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....
alexpopov86's user avatar
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Updating Front-end data based on smart contract data

I am writing an ICO(Presale) contract which have different phases of sale and different starting prices for each phase. Also, on each token sale the price of tokens increase by a static value. After ...
Bengican Altunsu's user avatar
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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 ...
alexpopov86's user avatar
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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 ...
alexpopov86's user avatar
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Why do ICO startups mostly prefer ERC20 tokens for raising funds?

Can anyone create ERC20 tokens on their own? Does it need any technical expertise? Provide whatever information you know relevant to this question. It will be helpful even for newbies who are visiting ...
Joshika P's user avatar
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When listing Uniswap V3 tokens for the first time, how do set the Min/Max price?

When listing Uniswap V3 tokens for the first time, I'm confused about what the "Set Price Range (Min/Max)" is about. I am trying to create the first liquidity pool(MTK/USDC) by pairing my ...
imelon2's user avatar
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USDT transferFrom reverting due to high gas consumption

I deployed a pre-sale contract for an ERC20 token and have the purchases being made in Tether USDT. The transactions have been failing when calling the transferFrom on the USDT interface because of ...
Alex Wong's user avatar
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Error: No events were emitted

I am coding an ICO project. However when trying to make the token purchase I got the following error: Using network 'test'. Compiling your contracts... =========================== > Compiling .\...
Lê Văn Thành's user avatar
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ERC20Token - crowdsale, not enough tokens for transfer issue

I am trying to create a ICO contract (Crowdsale) which will fecilitate the sale of ERC20Token. While migrating the contract, I am getting stuck at an error "SAMTokenSale" hit a require or ...
BlockChain Learner's user avatar
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1 answer
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Why most of tokens get a quick ATH after launch and then collapse in price?

If you observe the price profile on almost any token (eg in coingecko), you will see a quick peak to ATH soon after the launch, and then, a quick collapse to a mostly flat profile near zero. Any ...
pellyadolfo's user avatar
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Is it possible to sign an Ethereum transaction when you only have the account address?

I need to sign & verify an message on Ethereum, but my problem is that I only have my account address. When I try to use for instance MyCrypto it requires another type of wallet. I have tried ...
HoleInVoid's user avatar
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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/...
Ugochukwu Ozoamaka's user avatar
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How does Token Generation Event (TGE) work?

I can see ICO has been replaced with TGE for many token sales. Does Token Generation Event refer to the owner of contract minting the token everytime when it goes through an event like private seed, ...
bbusdriver's user avatar
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Issue Badges (ERC721) for ICO participants ; and based on that define reflection % in the ERC20 contract?

I have unique requirements for a project. They are trying to issue ERC721 based badges/identities to the ICO participants. And utilize that identity/cert for sending reflection rewards via ERC20 ...
Sim Md's user avatar
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I want to limit the amount of ethers sent to a smart contract

I am a kinda newbie to this, so please excuse my questions. MY FIRST QUESTION: I am creating a simple ICO using a simple smart contract. I want to set a limit for people to send ETH to this smart ...
Admani's user avatar
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In airdrop contract, I want each registered user to claim free airdrop tokens

I'm writing a simple airdrop contract in which user will register himself using register(), and his address will be added to an array registered[]. After the registration period is over, admin (who ...
Ashish kumar's user avatar
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Problem with ICO smart contract on Ropsten

I hope you are all well. I have a problem with an ICO smart contract. I have deployed this smart contract on ropsten and when I send ethers to the smart contract I get an error message which says “out ...
Pierre's user avatar
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How an ICO works

Well, I'm working on developing an NFT game. So far it's all right. I have already created my ERC20 contract for currency. At that moment when I create the contract I created 5 separate portfolios, ...
Crazy's user avatar
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Why do an initial ERC-20 offering on a testnet instead of Mainnnet?

Why would someone launch an ICO to an Ethereum network other than Mainnet, i.e. testnets? Are there any technical or philosophical reasons why someone would not choose Mainnet to launch a new ERC-20 ...
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"send" and "transfer" are only available for objects of type "address payable", not "address" [duplicate]

I'm creating a smart contract to sell my tokens, but I'm having the following problem: TypeError: "send" and "transfer" are only available for objects of type "address payable&...
Crazy's user avatar
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ERC20 ICO - Transfer tokens

To make an initial ICO do I need to transfer TOKENS to the ICO smart contract? Or can I use a wallet that has the tokens and then transfer from that wallet to the buyer's wallet?
Crazy's user avatar
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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). ...
DHC's user avatar
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Can an erc20 token contract decide how much of an investors tokens are claimable based on an external event?

Post ICO, I plan to return a specific amount of investors' fiat funds if an event doesn't occur before the initial claimable event. Is it possible to add a clause into the claimability of tokens based ...
rome's user avatar
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How to create Crowdsale contract for ERC-1155 fungible tokens

I am new to develop ERC-1155 contracts. I have created a contract that holds two types of tokens (fungible and Non-fungible tokens). Now I want to add a crowdsale functionality in my contract, where ...
Umair Janjua's user avatar
1 vote
1 answer
2k views

How is the initial price of a cryptocurrency determined?

I know how or what affects the price of a mature coin (buying and selling). But when it is first minted, what determines its initial price? This is not a philosophical question I'm asking. I was ...
Kristada673's user avatar
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Is it possible to redistribute ERC20 tokens?

While helping a friend with his ICO I saw he made a mistake while creating the tokens. The idea was the following: 20% Pre-sales and ICO 10% for the whole team 2% Marketing 1% Bounty 1% Airdrop 1% ...
sphraax's user avatar
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1 answer
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How are all these crypto tokens ICO's legal?

I started noticing lately a lot of crypto meme tokens being generated and sold online in a variety of ways. Basically everyone can generate ERC20 BNB based tokens, sell them in a pre-sale, and put ...
Zed's user avatar
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1 answer
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What was the first coin to offer "reflex" and auto-adding liquidity?

Who was first? I see these features being forked on a massive scale. I would like to know who was first and where to find GitHub repo (ideally with tests) so I can play with it. SafeMoon SafeMoon ...
Mars Robertson's user avatar
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What is it mean by minting token?

I've created a BEP20 token and I can't figure out some steps, I've created for about 21000000 total supply of token and why should I mint token after creating it? How much should I mint? How minted ...
Davoud's user avatar
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What to change when ico has been ended and public sale will be started

I want to start an ico on the ERC20 network. The ico will be available for three months for example. For that I have to write a smart contract. That is clear to me. It is only not clear to me what ...
jurh's user avatar
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How To Verify A Coin Without Original Contract Source Code?

We are new to crypto. A while ago we created a coin (3DOM coin) with 14,000,000,000 units and stored them in our wallet on myetherwallet.com. We would like to deploy the token now but we do not have ...
Daftcyborg's user avatar
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Development phase after successful ICO? [closed]

I would like to know about the development phase after successful ICO. Let's say I have an idea regarding a Defi Project but don’t have enough capital to implement it. So I launched an ICO using ...
Veer Vaar's user avatar
4 votes
1 answer
2k views

what's the point of merkle distributor?

I am trying to understand why Merkle Distributor AKA merkle airdrop is used. I understand how it works, but what I don't understand is why it's a better option. People use it when there's ICO and they ...
Nika Kurashvili's user avatar
1 vote
1 answer
261 views

How can I transfer ERC20 Tokens to Bitcoin donor in ICO?

I developed ICO on solidity. As everyone knows smart contracts only accept ETH, but I've seen many ICOs which accept BTC and any other cryptocurrency as well. I want to know how can I handle it if ...
Dhaval Parmar's user avatar
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270 views

Why is my Crowdsale Contract not letting me buy?

Good day, I have designed a mintable token that has a max supply, I now want to sell that token in a Crowdsale. I created the crowdsale contract, set the token address, transffered the funds... but ...
AvocadoChocolate's user avatar
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1 answer
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If I participate in a ERC20 ICO with my Metamask eth address, can I add the custom token later on?

If I have not added the ICO's token to my Metamask yet as a custom token, can I do it after the token distribution? Like claiming my tokens after it's been sent, by adding the new custom token to my ...
curiousTrader's user avatar
1 vote
1 answer
370 views

Difference between types of sale activities for tokens

I want to underatand whats the difference between a crowdsale, airdrop, ICO, ILO, ipo and presale. Are all these types of presale activities?
mzaidi's user avatar
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Warning! Error encountered during contract execution [execution reverted]

I have an ERC20 Mintable+Burnable Token created on solidity 6.11 and a sale contract on solidity 5.0 I am getting error when i send ETH to the sale contract. https://rinkeby.etherscan.io/tx/...
VagueRumi's user avatar
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Unable to verify if a contract's tokens is greater than the requested amount by ther buyer

I want to explain you the problem so that you don't need to read the whole files. BirTokenSale contract is trying use the tokens given to it by another contract ,BirToken contract, and send the money ...
abhinay_bir's user avatar
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1 answer
762 views

How To Update total supply ERC20

I have an ERC20 smart contract address The total supply is 1,000,000,000,000 Now I want to increase the total supply please help me What code should I use in https://remix.ethereum.org/
rasoul's user avatar
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1 answer
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How to get initial balances for all those who bought tokens?

Is it possible to get the initial balances for all those accounts who bought ERC20 tokens? If that’s possible, how that can be achieved? I’m wondering if there is any way of getting that information ...
Saulo Ricci's user avatar
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3 answers
1k views

transferFrom function not working in ICO Smart contract

I am facing issues with the transferFrom function of smart contract address 0x6560a9b6436e129cf835ab9da96201207facd4f8: I copied the smart contract code from etherscan.io and deployed on ropsten ...
Ashadipta's user avatar
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1 answer
545 views

If I create an ERC-20 token and accept dollars from people in exchange of my ERC-20 token, would this be an asset-backed token?

If I create an ERC-20 token and accept dollars from people in exchange of my ERC-20 token (with 1 token per dollar), would this be an asset-backed token or a security token? The idea is to create an ...
AshT's user avatar
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1 vote
1 answer
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Dates of ERC20 tokens transactions

I'm an individual who is interested to ICOs which are selling ERC20 tokens. My question is related to an issue that, for most of the ERC20 tokens, the dates of transactions do not fall within the ICO ...
paella12's user avatar
1 vote
1 answer
280 views

Crowdsale, how to calculate hard cap?

I was reading this article about Crowdsale. Simply, 100 Tokens are to be minted. The author set 60% of tokens are distributed as public sale. To be more specific, 20 out of 60 tokens will be sold ...
bbusdriver's user avatar
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1 vote
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How and Why other should buy and sell my ICO token? [closed]

When I invest or create a token, I am hoping someone in the future will want to buy it at a higher price. Why would anyone buy my tokens to use the platform if the price of the token keeps increasing ...
Balakrishnan's user avatar

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