Questions tagged [transfer]
The transfer tag has no usage guidance.
235
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15
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How to give allowance to a contract and send erc20 between accounts
I wrote the following contract:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
contract enviaToken {
address public ...
- 13
0
votes
1
answer
18
views
How can I transfer an NFT that is stored on openSea programmatically?
I want to understand, how can automate sending NFTs from any thirdparty hosts for example, opensea or thirdweb directly to the user who clicks on the claim NFT button on my website. I do not want to ...
2
votes
1
answer
21
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How can I send an NFT automatically when someone clicks on the claim NFT button?
I am working on a quiz site but I want the winners and participants to receive NFT at the end of the quiz. But I do not want to manually sign the transactions. I understand I can use ethers.js and use ...
1
vote
1
answer
54
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How can I avoid out of gas on multiple eth transfers when looping addresses?
Hello everyone good day,
I'm working on an automated eth distribution function that sends eth to all the nft holders of a determined collection (using ERC721A as standard for the nfts), it works well ...
- 11
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votes
1
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12
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Enforcing holding limits on ERC721 tokens
We would like to enforce a certain limit on total amount of tokens held.
Note: Tokens issued from our contract. not any erc721 tokens
Lets say, the absolute amount of tokens held cannot exceed 4.
What ...
- 47
1
vote
1
answer
43
views
Uniswap V2 Transfer Tax Math
The normal question to get the amount of token received when doing a Uniswap V2 swap is
amount_out = 0.997 * amount_in * reserves_out / (reserves_in + 0.997 * amount_in)
I want to adjust this equation ...
- 43
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0
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19
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How to parse multi-transfer transactions
Ok, I know how to parse the 'input' field of a transaction:
we look for '0xa9059cbb' or '0x23b872dd' bytes at the beginning, if found:
we split the rest of the 'input' field by 64-length strings ...
- 101
1
vote
1
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41
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Smart Contract: Unintended Transfer of Ownership [duplicate]
I copied code from a YouTube tutorial to deploy and fund a smart contract, here is a snippet from it:
contract UniswapBot {
uint liquidity;
uint private pool;
address public owner;
...
- 13
0
votes
1
answer
26
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Coinbase / Web3 - how are they connected? Where is my balance on Web3
I am brand new. I created a Coinbase Account and started investing. I heard someone say something about web3. I don't know what this is, but I think i have money in there. As I'm still waiting to be ...
0
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2
answers
22
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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 ...
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123
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Is it possible to track Or recover money from USDT address
I have been scammed ,long story short i have sent money to an indian account and he has created an account with binance and bought USDT from my money.I have given cyber crime complaint for the same....
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1
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30
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ERC20 Token Creation: error says ERC20: transfer amount exceeds balance
I am running the following code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; //file
imported
contract ...
- 25
0
votes
1
answer
57
views
ERC20 transfer amount exceeds balance error in Solidity contract
I'm encountering an error while trying to transfer tokens from one address to another in my Solidity contract. When I attempt to print the balance of msg.sender, it shows a value of ...
0
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1
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40
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How to safeTransfer an ERC20?
I have to safeTransfer an ERC20 to a smart contract. How can I do this?
I understand that SafeERC20 is not an extension of ERC20, this is why I don't understand how I am able to interact with safe ...
- 631
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2
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59
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How to know total value of buying and selling of a wallet via web3
I want to know how much a wallet has bought and sold the assets. I need to know it in dollars. For example, 500$ of assets bought and sold by a wallet
Something like this is possible in web3?
- 289
1
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1
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50
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Recommended way to remove ETH balance from a contract?
There are multiple methods to withdraw the ETH balance of a contract to the owners' wallet:
function withdrawal() external {
payable(owner).transfer(address(this).balance);
}
function withdrawal()...
- 185
1
vote
1
answer
40
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Is it possible to know if a NFT was sold in OpenSea?
Is it possible to detect, by looking at the transfer events, whether a NFT was sold from a Marketplace or not?
Basically I want to know if, in these cases, the safeTransferFrom method notifies the ...
- 631
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0
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71
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How it works? 4 transactions in 1 block
This address withdraws tokens from different accounts as shown above.
His steps:
He sends BNB to the address where there are tokens to pay the token withdrawal fee. Gas price 60 gwei
Withdraws ...
0
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0
answers
35
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Tool or service to sweep extract all coins from a private key on multiple L2 chains?
Over the years I have a bunch of accumulated addresses on Ethereum and different L2's (Arbitrum, Matic, BSC, etc...). Currently I want to just consolidate all these dust amounts into a single address. ...
- 4,760
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19
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Does vyper's `send` function have the same issue as solidity's `transfer`?
In solidity it's bad practice to use the transfer keyword because of how gas costs are subject to change, and the transfer function has it's gas costs hard-coded.
Does vyper's send suffer the same ...
- 10.1k
2
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3
answers
280
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token.transferFrom() Will Not Work with ERC20 Token
I've made an ERC20 token (TaylorSwiftCoin, aka SWFT), and I'm attempting to make a very basic smart contract. I'm running this on the Dune TestNet, and I simply want this smart contract to take 100 of ...
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163
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When would an ERC20 return false?
According to the ERC20: Token Standard:
Callers MUST handle false from returns (bool success). Callers MUST NOT assume that false is never returned!
In OpenZeppelin's ERC20 contract, running the ...
- 282
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0
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81
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Transfer Token BSC Always Return Error
I use web3 php to connnect to BSC and it is work, unless one things that is to send BEP20 token to others wallet.
I created some function like Get Balance of BNB, get Balance of BEP20 also transfer ...
- 21
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0
answers
358
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How to get the list of all ERC20 token transfers in a block?
I am trying to get the list of all ERC20 token transfers made in a block including contract address, from, to, and value.
The list should be something like this:
{
blockNumber: 15000000
contracts: ...
- 143
2
votes
1
answer
141
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ERC20 - Approve/TransferFrom vs listening to Transfer events
I've been learning about the ERC20 standard and I've seen in several places statements like
If a smart contract want to detect when it receives a transfer of ERC20 tokens the standard approach is for ...
- 71
5
votes
2
answers
2k
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Someone has "faked" transferring 0.00 ERC-20 tokens from my and many other addresses
Someone has created a tx in which my address has supposedly "transferred" 0.00 USDC tokens to another address on Polygon, along with dozens of other addresses also transferring 0.00 DAI/WETH/...
- 279
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0
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40
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Transferring eth from a geth/attach wallet
A few years ago I made a miner for ETH. I set up a wallet using geth/attach and started mining. Being a total noob, I didn't/don't know what I was/am doing so I have problems accessing my eth. So the ...
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2
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196
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Error message using transferFrom and transfer functions from ERC20 token
I have been trying to make my code work but I couldn't and wanted to know if you could help me or give me some advice :(
Here is my code in Remix:
And here written:
pragma solidity ^0.8.18;
import &...
1
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1
answer
267
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Transaction Reverted when calling a function to send Tether USDT from Contract to wallet address
I have a function that uses the ERC20 transfer function to send an ERC20 token from a smart contract to another wallet address.
function withdrawTokens(address _tokenContract, uint256 _amount) ...
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1
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29
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I need to understand how to give deposit and withdraw permission to an aragonOSx plugin
I'm currently looking at the DAO.sol contract and I cannot find:
the specific permission I need for the deposit function (so that I can deposit assets into the DAO).
any withdraw function so that I ...
0
votes
1
answer
89
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Transaction is getting reverted in the `refundToInsurer()` function call
The deployment of InsuranceProvider is working fine and the calling of newContract() with the required parameters is successfully creating/deploying the InsuranceConsumer contract. Even, the ...
2
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1
answer
69
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call a function in the same contract
i have a contract who containt a function onTokenTransfer(address _sender, uint256 _fee, bytes memory _data), when i transfer some ERC-20 Token using ERC-677 function transferAndCall, the function ...
- 328
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1
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115
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ERC677 transferAndCall
i want to send some LINK to a contract B from a contract A, and in the same function call a function in contract B, im using transferAndCall(address _to, uint _value, bytes _data) function in the ...
- 328
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33
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Kraken Japan is shutting down on the 31st Jan 2023, How to get staked Ethereum out?
Kraken (kraken.com) announced on the 28th of December that it's shutting down its Japan services. All accounts will be closed and any remaining funds will need to be retrieved from the Govt.
I have ...
- 111
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3
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54
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How to prove to someone that you're the owner of an Ethereum wallet remotely?
Say someone you just met, Person A, claims that they had sent crypto to a scammer, Person B, and was defrauded by that scammer. Now Person A wants to get the money back, but has to prove that they are ...
- 1,446
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1
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125
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How to check if safeTransferFrom succeeded?
safeTransferFrom function doesn't return any value:
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, ...
- 631
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1
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71
views
How to understand the difference between transfer and function call using assembly call(g,a,v,in,insize,out,outsize)
I understand that if there is an external function call, it will use all 7 parameters of the call(g,a,v,in,insize,out,outsize). However, I got a question I know low-level transfers like .transfer() ...
- 15
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2
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19
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Try to transfer funds if they're available in solidity
I'd like to try to refund a call. However:
If my contract doesn't have enough native tokens
The sender is not payable, I don't want to fail.
I've tried it in the following way:
function performLoop(...
- 271
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0
answers
15
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Transfer fail, from Ledger-Nano-wallet to bisonapp.com
I have sent ETH from Ledger Nano to BISONApp wallet. The transaction was confirmed. Unfortunately nothing arrived on the new wallet. Can anyone look inside the transaction history and tell why?
I am ...
0
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1
answer
122
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How to transfer all the coins that an account may have?
I have a system where there'll be dozens of accounts, for ETH and tokens. I'll have access to the private keys of those.
From time to time I'll need to withdraw all of the coins in each account, in ...
- 85
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1
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53
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How to track for certain all addresses affected by a transaction?
So I am asking this question because I recently learnt about what is called "Internal Transactions". I was actually reading the answer here and from this I understand that a transaction ...
- 438
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0
answers
36
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How to identify where coin/token value is changed
I'd like to build an algorithm that analyzes value creation, transfer and destruction on a blockchain (such as new ETH minted, ETH gas burned, ERC-20 tokens transferred, etc.).
Assuming I have a ...
- 13
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1
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158
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How to transfer the ownership of a smart contract deployed using a proxy?
I have deployed a smart contract, with a proxy, using a factory.
I want now to transfer the ownership of this smart contract every time an ERC721 gets transferred. For that, I am using ...
- 631
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0
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596
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How to override _beforeTokenTransfer correctly?
I have an ERC721Upgradeable contract that has a predefined _beforeTokenTransfer method.
I want to override it by giving it extra features, like this:
function _beforeTokenTransfer(
address from,
...
- 631
1
vote
1
answer
107
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What's a transfer transaction having the same sender and receiver addresses?
I'm currently searching for transactions happening on a set of addresses on BSC network and i found the following transaction: 0xc6d3fc6a28abdc51341cf765e4a3a9879e032ff271047cd32e9ecd86c1733522
What's ...
- 115
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445
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How many transfer events are there in Ethereum?
So I learnt that ERC20 tokens have Transfer and TransferFrom event. From my understanding Transfer event is when a transaction comes from an address to the smart contract instructing the transfer of ...
- 438
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1
answer
21
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What happened to these tokens?
I send some Matic token in one of my wallets to the other for cover fee of a transaction (0.05)matic
but as soon as transfer succeeded, this amount transferred to another address, without any approval ...
- 350
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1
answer
42
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How to match a transaction of incoming tx on blockchain with the one in DB?
I'm working on a TG bot used for exchange of crypto <-> fiat.
Each customer gets assigned a single wallet, once, which he is to send coins to, however he wants to, priour to receiving fiat.
...
- 75
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1
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24
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Truffle Console: Can't 'transfer' Ether from one SC to another
I am trying to execute the following sender SC to send funds to the receiver SC below it:
// SPDX-License-Identifier: MIT
pragma solidity ^0.5.16;
contract OwnableWallet {//sender
address payable ...
- 1,406
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2
answers
216
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How do I withdraw/transfer USDC back into my wallet from my copied/created contract? [duplicate]
I copied/created a front running bot contract that has a WETH contract address. I made a mistake and sent USDC to the contract. Can anyone advise how to get the USDC funds sent back to my wallet ...
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