Questions tagged [transfer]
The transfer tag has no usage guidance.
224
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Can ERC-20 token transfers have re-entrancy?
I understand that re-entrance attack can happened when you send ETH, because of fallback() function. But in ERC20 transfer there is no call for fallback, so I wonder if there's a way to make re-...
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1
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30
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What are some APIs that write transactions to the blockchain?
Are there any APIs that write transactions to the blockchain?
I am most interested in RESTful versions.
- 201
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1
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175
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Invalid amount in MetaMask app on iPhone
I am using Moralis for simple token transfer from one wallet to another. My code:
And this works great on desktop (Chrome MetaMask plugin):
But when I wanna use this on my phone - iPhone (MetaMask ...
- 103
0
votes
1
answer
235
views
erc20 transfer function not working
i am developing a locking smart-contract where user can add token address, amount and lock time. i imported erc20 standard from openzeplin but when i transfer erc20 tokens to my smartcontract is ...
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vote
1
answer
91
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How to send ether from smart contract to a particular address
I initially transferred some ether into the smart contract when deployed and in one of the function I should be transferring ether to the address of the msg.sender. Help me out if you can!
- 11
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1
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280
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Why ERC721 does not have direct transfer function?
I was researching the ERC721 standard on Openzeppelin and I have noticed that there is not public or external "transfer" function.
I see internal "_transfer" function, that is ...
- 1,471
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2
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1k
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ERC20 how to transfer token from contract to an account?
This contract created token and has stored it in his own address (contract address).
I want to implement a function that transfer token from this contract address to an account address.
pragma ...
- 123
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vote
2
answers
230
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transfer money without specifying the amount
I have a list of products, each product has a price.
I would like to create a function that can be called by a user and automatically checks whether the user's balance has enough money to buy the ...
- 113
0
votes
1
answer
754
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Getting Fail with error 'TransferHelper: TRANSFER_FROM_FAILED' while trying to swap part of tokens during transfer
I have created ERC20 token and want to modify transfer function so that swaps part of transferring amount to another token.
I'm using OpenZeppelin ERC20 contract.
// SPDX-License-Identifier: MIT
// ...
- 101
0
votes
1
answer
346
views
payments ( pre set value) in solidity
I am developing a movie renting smart contract where the owner can add new movies, clients can search movies and pay for the movies they select. Adding and searching is working to my liking.
The ...
- 1
0
votes
1
answer
90
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Send Ether from SC to EAO
I came across many blogs saying the defacto standard to send ether from one contract to another and why one is better than the other. However, what is the best practice for sending ether from contract ...
- 1,434
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59
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Subscriptions - Recurring payments (Fiat to Crypto wallet)
I checked several platforms (BitPay, Stripe, Plaid etc..) but none seem to enable me to setup a recurring payment from fiat to a crypto wallet the same way you would do it on Netflix with your bank ...
- 51
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1
answer
785
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Calling payable function will directly transfer eth?
It seems that calling a payable function will transfer eth directly even without explicitly calling transfer(). For example:
contract Storage {
receive() external payable {}
// Fallback ...
- 55
0
votes
1
answer
19
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_addr.transfer(amount) dependent on value in message
I am trying to write a simple smart contract that accepts a small constant fee of eth. I am using the _addr.transfer(fee) function and the 'fee' is set in the contract at time of construction. I am ...
- 103
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429
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Is "approve" required only for transferring tokens? Not a native coin?
Speaking of Ethereum blockchain, or any other one compatible with it: Polygon, Avalanche and others: is calling the function approve(...) mandatory only, and only, when there's a token involved in ...
- 35
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1
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618
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Transferring ERC721 tokens with web3j using an operator
I've been struggling using web3j (the web 3 Java library, not JS) transferring ERC721 tokens from one user to another, using an operator. I get that we need to approve the operator from the user that ...
- 11
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166
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Send ERC20 tokens(it is link) from an address to smart contract
I can not transfer ERC20 tokens from my address to the contract. But I can transfer from the contract to other addresses.
my account(msg.sender) has 10 link(ERC20) tokens . and i want to send these ...
0
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216
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How to retrieve Wrapped BNB tokens sent to Ethereum Smart contract instead of Binance Smart Contract address?
Need desperate help from experts here. I swapped my ETH coins to BNB first to buy some pre-ICO coins, but executed a contract in Ethereum network (accidentally forgot to create and transfer Binance ...
- 1
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vote
3
answers
841
views
Why is the address.call function failing?
Im trying to run the following solidity-by-example on remix:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;
contract Payable {
// Payable address can receive Ether
address payable public ...
0
votes
1
answer
41
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How to perform an action when receiving tokens in smart contract
So I have some custom Tokens in a smart contract and whenever I receive BUSD in the smart contract I want to be able to send some of the custom Tokens back to the user that paid through a button from ...
- 15
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1
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40
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Contract does not accept eth sent from another contract
Hi I try to send ETH from Sender contract to Receiver contract by calling sendPayment function. But I get an error. I know that the issue is the require statement in the fallback function because ...
0
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1
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186
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Transfer() method with Web3 I got error and didn't transfer
I tried to make a button on we3 when click on it, the transfer method should start after 5 minutes.
when I click my button first of all metamask show me this
when I click on try it anywhay this error ...
- 3
0
votes
0
answers
37
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Transfer condition modification
I am trying to add a condition that when the token is sold, change the fees to 7, in case it is a purchase, leave it at 1. Would the code shown be correct? In any case, what would be the best practice?...
0
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1
answer
28
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Give certain address permission to transfer ownership
I'm trying to create a contract and give a certain address, that is not the owner, permission to transfer ownership, or to atleast have the transferOwnership function public but only be able to ...
0
votes
1
answer
33
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Sending balance to contract fails
I'm playing ethernaut, the king of the hill level. I made a practice target contract and an attacking contract. I want to send value to the attacking contract (this works) then I want to send the ...
- 3
2
votes
2
answers
3k
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How to send ether from msg.sender to another address from within the contract
I'm new to solidity and I'm currently experimenting with smart contracts. As shown in the code below (only a part), I want to write a contract that lets you borrow money by paying a fee. I implemented ...
- 21
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0
answers
29
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Contract getFunds call which should send wrapped ERC20 token to owner reverts, why?
My smart contract holds a few WETH. I have this function in my contract:
function getFunds(address tokenAddress) external onlyOwner{
IERC20 token = IERC20(tokenAddress);
uint ...
- 123
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0
answers
136
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Why the transaction reverted when I try to sell tokens on uniswap v2 router2, but success on browser？
I am using web3 to send transaction to uniswap v2 router2 to sell my tokens for ETH, with both the sold token and WETH approved for router2 with amount of uint256max, and I set amountOutMin to 0 ...
1
vote
1
answer
2k
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How to test sending eth to function using ethers.js?
I'm net to eth dev and trying to test sending eth while assigning a value to betOnTeam function:
function betOnTeam(uint8 _team) public payable {
// assign usre to _team and add betting ...
- 165
0
votes
1
answer
52
views
Revert error when transfering available amount of ETH
I'm trying to code a reward pool distribution system and I'm unable to do the following (in that order).
A deposits X amount (user_deposit)
B deposits Y amount (user_deposit)
C deposits Z amount of ...
3
votes
0
answers
524
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Bypassing metamask notice about "Insufficient funds for gas"
I wish to make a transfer of the remaining ETH from one wallet to an other.
Trying to do it from metamask, it prevents me to do so with the "Insufficient funds for gas" error. Event though ...
- 131
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1
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178
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Amount is wrong when transferring ERC-20 token with web3.js
When I run the method on Etherscan or Remix, the amount is correct, and it displays with the token's symbol CSHIP.
Yet for the life of me, I can't get the right amount to show up when I am ...
0
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0
answers
230
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Do I need to use the approve function to transfer erc20 tokens from one address to another?
I'm making an nft marketplace and I want the buyers to buy the nfts with WETH.
function createMarketSale(address nftContract, uint256 itemId)
public
nonReentrant
{
...
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43
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My token is not converting to BNB on transfer with testnet
I have copied 1Love's code; https://1love.charity/: https://bscscan.com/address/0x25096f414c11a41c802a01bfa4210d76c88da838
However, on transfers I do not recieve bnb in my charity or marketing wallet.
...
- 101
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1
answer
2k
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deposite and withdraw erc20 token using smart contract
my goal is to create a smart contract which user can deposit erc20 and withdraw erc20 token using.i tried to implement this functionality using token transfer and transferfrom functions tried to send ...
1
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0
answers
47
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I have a question about how to tell whether tx is 'transfer', 'call', 'create' or 'destruct'
I want to distinguish between the types of Ethereum TX.
In the Ethercan, That is distinguish tx type like, transfer, contract create, contract destruct, contract call and etc...
so, I check trace data ...
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1
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41
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Sending Ether from contract to the sender
This is a very common question. I am trying to withdraw fund from the contract. I have tried send,transfer and call but the transaction hash always shows 0 value transferred
pragma solidity >=0.4....
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0
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270
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Cannot swapExactTokensForETH inside transfer of my token
I'm trying to create a token (calling it MyToken in this question) that on each transfer, it takes a fee from the transfer amount and does the following:
calling the uniswap router to exchange this ...
- 157
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1
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141
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Automated Eth deposits onto L2 (e.g. Arbitrum, Optimism, Polygon/Matic etc.)
I would like to build a bridge between L1 and L2 that will send Eth from the smart contract on L1 to the smart contract on L2 automatically. So one will be able to deposit Eth on a smart-contract ...
0
votes
0
answers
1k
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ERC20: transfer amount exceeds balance - working with transfer with ERC20
I am trying to call transfer of an ERC20 token from another "escrow" smart contract in remix JavaScript VM (London). I have 2 contracts like so:
MyToken.sol (an ERC20Votes.sol, but "...
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2
votes
1
answer
1k
views
How to transfer Ether from a smart contract to an account?
I wrote a very simple smart contract. The goal is to:
transfer some Ether from an account A to the smart-contract
and then from the smart-contract to another account B.
Here is the contract:
pragma ...
- 175
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0
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773
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How to send BNB (or other networks) with web3 on a dapp?
So, I tried the many examples found around but I never manage to get it working.
I have this snippet:
async function pay(cost) {
code = 0
message = "Please approve the tx"
...
- 123
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1
answer
58
views
ERC20 Token Transfer Issue
I have a test token (ERC20) deployd on ETH test network (Kovan)
The token was deployed using Unicrypt tool
So far everything ok, but the issues is how can i transfer tokens from an outside smart ...
0
votes
2
answers
982
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Is there a reason why the ERC20/ERC721 `safeTransferFrom` requires a `from` address? Why not just `safeTransferTo` directly?
I can understand that the from address in the safeTransferFrom function could be used by an approved operator. But I also wonder why not have another function for actual owners called just ...
- 398
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702
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I`ve sent ETH to the wrong address
I`ve sent ETH from my gate.io to my metamask and I wrong the last number from metamask, is there any chance to get them back ? In the etherscan.io still shows available.
This is good one: ...
0
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1
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60
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0
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1
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52
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Ownership question about Ethereum ERC20 tokens
I been considering creating my own Ethereum ERC20 token and I have one main question. When you create a Ethereum ERC20 token and you launch it, do you automatically own all of that Ethereum ERC20 ...
1
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0
answers
795
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How to transfer an ERC1155 Matic token using Node.js?
I'm trying to write a Node script that will transfer an ERC1155 token on the Matic network from my address to someone else's address.
Here's an example token:
https://opensea.io/assets/matic/...
- 111
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2k
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BEP-20 Token Transfer Error
I am unable to transfer test tokens from my address (say address A) to another address B. The steps I did were
deploy and verify a rebase contract, all tokens were automatically sent to my address.
...
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67
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Cannot transfer ERC-20 tokens from a contract
pragma solidity ^0.6.2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
contract MyContract {
IERC20 LINK;
constructor(address token) public {
LINK = ...
