Questions tagged [tokens]
A token is a transferable, divisible object on the blockchain, such as a subcurrency or a prediction market share.
2,418
questions
0
votes
1
answer
10
views
GoFundMe Contract: Minting "Thanks" over time vs all at once & "Thanks" token value
I was assigned to write a smart contract for class (to be deployed on a test-net), which, upon receiving ETH, returns to the sender some amount of tokens with symbol "Thanks". I want this ...
- 101
0
votes
0
answers
16
views
Smart contract question [closed]
Can you see some scam in this contract?Try to figure out what's gonna here..
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
abstract contract Context {
function _msgSender() internal ...
- 1
0
votes
1
answer
22
views
I am experiencing issues when trying to transfer funds on the Polygon mainnet
When I use the Polygon testnet to transfer tokens, it works fine. However, when I use the mainnet, an error occurs. Upon checking the contract methods on the mainnet, I notice that it lacks transfer ...
- 1
0
votes
1
answer
15
views
Trying to issue ERC 3475 tokens
I'm trying to issue ERC 3475 tokens from a relatively simple contract using Remix. The contract compiles and deploys when gas is optimized, but when I try to issue the tokens I get an error of "...
- 1
0
votes
0
answers
20
views
Return the current ERC20 token holders and number of tokens held
Are there any free APIs available that can provide current data on ERC20 token holders and the number of tokens they hold ?
0
votes
1
answer
14
views
Send selected token (the one you deployed) with web3js
How to send a transaction of a token that I have in my wallet other than the default one like ether in Ethereum without a contract method just with web3js?
- 25
0
votes
1
answer
22
views
How to send a token other then eth with metamask without extension of course?
I wanted send token other than eth with metamask using code but I did a little bit of research couldnt find anything. Do you guys know anything about that? I checked metamask docs site too didnt find ...
- 25
1
vote
0
answers
20
views
Calling Mint And Change Balance From Another Smart Contract
My Project is about a Token in which the Holder can disable their token at the Old Address and Receive a New Minted token.
It uses 2 different contacts. I put the functions in the BBB contract and ...
- 11
0
votes
0
answers
16
views
preventSwapBefore token contracts
I'm looking for a way to determine to determine tokens' contract private state variables such as _preventSwapBefore, or _reduceTaxAt, etc... Theese variables or often in token's contract, but in ...
- 11
0
votes
0
answers
13
views
How to add 5% buy and 5% sell fees to live-token?
I want to add 5% Sell and 5% Buy Fees to a token contract on Remix
The Token is already live, so i just want to update it from 0% to 5%.
But the numbers are all in uint256, what is the correct number ...
0
votes
0
answers
7
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 ...
- 63
0
votes
0
answers
22
views
Token holdings I need help with the contract im the owner of both wallets the send and receiver
I sent my tokens to another wallet that I own and somehow a contract intercepted it and my tokens are in holding. I believe I can get them back it’s just really confusing to r we the contact and I don’...
- 1
0
votes
1
answer
60
views
Token with whitelist function, that would only whitelisted addresses to trade the token while trading is disabled
I want to create a token and add liquidity but only whitelisted addresses would able to trade the token while trading is disabled. If trading is enabled that means everyone can trade it but if it is ...
- 133
0
votes
1
answer
34
views
Approve function called by an address in a smartcontract different from the token contract
I would like to know if an address can give approval to spend his tokens to another address or contract by calling the function approve in the same contract (not the token contract but another).
Thank ...
0
votes
1
answer
33
views
I have problem with deploying my token to Goerli testnet
I have an issue with deploying smart contract on Goerli network.
When I trying to run the contract I get Error
Error HH100: Network goerli doesn't exist
Here is example of my code
// SPDX-License-...
- 13
0
votes
1
answer
14
views
BPT value underlying
In Balancer, and the type of pools that work with yield tokens like Stable WETH-rETH, when getRate() gets called for the value of BPT, which output is in WETH,...
...does that BPT's value comes with ...
- 711
0
votes
2
answers
42
views
Help needed: ERC20 token "BIGTIME" sent to ERC20 smart contract that accepts USDC, BTC, ETH, MANA
Recently there was a launch of a token called "BIGTIME" (ERC20) from Bigtime Studios (web3 game) listed on a DEX, which I bought tokens from and transferred to the games smart contract to be ...
0
votes
2
answers
41
views
Calculate BPT price onchain
What's a safe way to calculate the onchain the price of a Balancer's BPT token? More specifically, from a Composable Stable Pool (if the clarification of the pool makes the calculation different). For ...
- 711
1
vote
1
answer
31
views
Is there a way that we can mint native coin more in ethereum?
I mean if i have my own private evm chain. the intial supply for it is, assumingly, 10000 coins. after starting the blockchain can I create more coins for that.
Like minting and burning works for ...
- 11
1
vote
1
answer
117
views
Identify if a token contract was deployed using Create2
Is there a way to analyze a token contract and determine if it was created using Create2?
0
votes
1
answer
31
views
Approval question
Beginner question:
I have trusted wallet with 1000 LINK erc20.
I want to swap it to get USDT erc 20.
It ask to approve the LINK.
How long approval takes?
In some time after I got the USDT, I wish to ...
- 3
0
votes
1
answer
30
views
Perplexing issue: Ownable: caller is not the owner'
i am a new developer and i am struggling with an issue since two weeks now and can't get to the bottom of it.
Here is some context: I have two smart contracts, one minting an NFT and the other issuing ...
- 1
0
votes
2
answers
90
views
ERC20 token smart contract check
I updated my smart contract code according to the explanations you gave and the instructions you gave. Please, if possible, check the rewritten code again and give your general opinion, is this smart ...
- 63
0
votes
2
answers
23
views
Why there are few transaction before the Contract Creation txn?
Does anyone know in this smart contract (see screenshot below) why there are few transaction before the smart contract creation txn?
It seem like this smart contract was previously a normal EVM wallet ...
- 1
0
votes
2
answers
156
views
Batch Token Swap using 0x
I'm trying to make a telegram bot that sells all the tokens available on a wallet using Ox API. In order to automate the process with only command, I'm okay with adding the private key to the script.
...
0
votes
1
answer
26
views
How should I integrate my ERC-20 Smart Contract into the existing cryptocurrency ecosystem?
I've created my own cryptocurrency based on the ERC-20 Smart Contract on the Ethereum blockchain. I want my currency to have the same functionality as Tether USDT, for example. To be more specific:
I'...
- 3
0
votes
1
answer
19
views
Using the Freeze functionality as a user in the BNB contract
In the BNB contract there is the Freeze and UnFreeze functionality.
As I have understood, this doesn't allow Binance to freeze users’ balances. Instead, it allows any user to freeze and unfreeze their ...
- 1
0
votes
0
answers
18
views
Treating two assets as equal in a smart contract that aren't equal
I am auditing a protocol that creates a token yETH representing a basket of liquid staking tokens such as rETH and stETH. I noticed that the protocol treats yETH as if it is 1:1 with ETH when it's ...
0
votes
1
answer
26
views
I want use own ERC20 token to buy things
I create my own erc20 token and transfer into the metamask. Now I want to use for purchase things which i am listing on the website .For example ,i made a shop where different things are avaliable . ...
0
votes
2
answers
35
views
Can a function call itself?
Can a function call itself...specifically, I am looking at this code and I can't figure out how this could work properly...the parameter vault would be the first parameter in the line that calls ...
0
votes
1
answer
35
views
Why is there only one USDT which PoS?
In Polygon wheneer I deal with USDT, it's always PoS. There's no ordinary USDT - without PoS remark, though.
Are all USDT in Polygon PoS ones? Or are there other types too?
Or did there use to be ...
- 49
0
votes
0
answers
12
views
How to find common address between certain tokens?
How do I find a common address between let's say COIN 1, COIN 2 or COIN 3 sellers and buyers? searching through Etherscan or similar explorer site can take hours and hours.
Any tool where we can put ...
0
votes
0
answers
33
views
smart contract obfuscation
Can anyone assist me in identifying the obfuscation method or tool used for this smart contract?
I've searched everywhere, but I did not find any tool or method for smart contract source code
...
- 1
3
votes
2
answers
149
views
Why are the Aave V2 supply and borrow index rate calculations done differently?
I have a question about the math in Aave V2 that performs the update liquidity and borrow index. This question was also asked and unanswered in the Aave Governance Forum.
I see calculateLinearInterest ...
- 101
0
votes
0
answers
37
views
why can't use Apostrophe( ' ) in token Name,
Polygon explorer/ etherscan explorer
why can't use Apostrophe( ' ) in token Name, And if I did the explorer shows "'"; instead Apostrophe. eg.(cat's = cat+ "'"+ s)
...
- 49
1
vote
1
answer
16
views
VM Exception while processing transaction: revert while buy token
I built a token based on ERC20, when I try to buy tokens I get this error
In the truffle console
Quinn.deployed().then(function(ins){token=ins}) QuinnSale.deployed().then(function(ins){tokenSale = ins}...
2
votes
1
answer
106
views
Best practices for staking contract which redistributes variable stablecoin input (cash flow)
I need to develop an Staking contract which allows users to:
Stake their tokens
Claim rewards
Unstake their tokens (no more rewards afterwards)
I have been researching about different examples like ...
- 1,731
0
votes
2
answers
102
views
Get multiple ETH transactions
I'm a little new to Web3, and in NodeJS I'm trying to create a deposit-aware system. Today I'm doing the following:
ETH Transactions: Get it through getBlock, and check whether the "to" of ...
- 13
0
votes
2
answers
18
views
What are the standard solutions to enable new users to interact with a DApp contract for free without gas fees?
I'm developing a decentralized application (Dapp) where new users receive a free NFT upon registration. I want to allow these users to list their NFTs for sale without requiring them to have any ...
- 1
0
votes
1
answer
34
views
Gas cost on mapping
I'm reading docs on Venom and they said that the problem on using mapping in ERC20 contract is "Now let's imagine that we have an erc-20 like mem-token contract with one large hashmap of token ...
0
votes
2
answers
39
views
How to transfer push tokens from mainnet to goerli?
I swapped my Eth in mainnet to get push tokens in Mainnet. I need to use these tokens to create a channel in staging app of PushProtocol. However, when I switch to Goerli network on Metamask on which ...
2
votes
1
answer
34
views
Transfer tokens to and from smart contract [closed]
I would like to have a new ERC20 token and one or two smart contracts to do automatic trade with specific cryptos.
Example: I can buy 1 token from the contract in exchange for 1 USDT.
I can sell a ...
- 123
2
votes
1
answer
457
views
How to sign a transaction using metamask or other wallets in nethereum
I searched a lot on the internet and in the documentation, but I still haven't found the answer to my question.
I want to know how to sign a transaction through an external wallet using the nethereum ...
- 63
1
vote
1
answer
25
views
Is this method technically and logically correct?
I am implementing a practice project on the topic of token pre-sale. Currently, I have created the project in such a way that, for example, a user who is going to participate in the token pre-sale ...
- 63
0
votes
2
answers
52
views
I bought a token the amount appear in bscscan but not in pancakeswap
0
I bought a token; the token amount appears on bscscan.com but not in the pancakeswap.
The token has a 100/100 rate on the token sniffer website.
this link is the token contract: https://bscscan.com/...
- 15
1
vote
2
answers
357
views
How to get address of deployed smart contract in hardhat
I have two files, Token.sol and Token.js for Testing:-
Token.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.19;
import "hardhat/console.sol";
contract Token{
string ...
- 13
1
vote
0
answers
47
views
Airdrop Contract with Merkletree for Addresses
I am trying to create a simple airdrop contract that handles a batch transfer of ERC20 tokens from one address to a list of address in a merkletree.
I am struggling to figure out whether or not the ...
- 75
0
votes
0
answers
16
views
Multible Transactions right after opening Trade or Method 0x110bbd8d
I've been looking at the latest pairs on dextools.io lately and I've noticed that it's becoming more and more common that even when the trading pair is only a few minutes old, there are already ...
- 1
0
votes
2
answers
38
views
Does anyone know why this still reverts?
So, I'm trying to test an underflow of test ERC20 tokens, but even if I remove all the require checks of the EIP20 (ERC20) file, when I transfer 1 test token from the contract to an address (the ...
- 35
1
vote
0
answers
165
views
How to track ERC20 token creations on Ethereum blockhain with web3.js using Infura API?
I'm trying to fetch new ERC20 tokens from the blockchain transactions, my code is scanning the blocks and when I tried to log transactions it works well, (dumping bunch of logs). However I don't know ...
- 131