Ethereum

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Awarded 5310 times.
connecting to Metamask using React.js and Next.js without having to refresh the page each time
Awarded 16 hours ago
How can I calculate the gas fee of a swap on Uniswap?
Awarded 2 days ago
Adding element to mapping (solidity) is not working, even if the method is actually called in the transaction
Awarded 2 days ago
How to enforce that 1 copy of an NFT has a unique meta data that no other copies of that NFT can also have?
Awarded Feb 23 at 22:05
What will PR-2149 offer?
Awarded Feb 23 at 19:19
How does uniswap process so many transactions on the clogged ethereum network?
Awarded Feb 23 at 14:20
Solidity version mismatch
Awarded Feb 23 at 4:47
“txHash: undefined” error using web3.js
Awarded Feb 21 at 18:17
What is meaning of logical comparison of ethereum address | solidity
Awarded Feb 19 at 12:34
How to pay an Oracle with Link token if I have payable with Ethereum values?
Awarded Feb 19 at 9:57
How to deploy a contract with a token contract as a parameter?
Awarded Feb 19 at 8:55
Question about pending transactions
Awarded Feb 19 at 8:17
Do my outgoing gas fees of a single transaction increase if my sending wallet contains ETH made up of many small transactions?
Awarded Feb 19 at 1:05
Pattern for generating dynamic ERC-1155 or ERC-721 metadata
Awarded Feb 18 at 10:11
How do i connect to an ethereum node?
Awarded Feb 17 at 20:06
How can I download the entire Ethereum blockchain?
Awarded Feb 17 at 16:41
Converting between USD and a custom ERC-20 token
Awarded Feb 17 at 4:30
Error: Returned error: insufficient funds for gas * price + value at Object.ErrorResponse
Awarded Feb 15 at 15:45
Airdrop without Gas Fees
Awarded Feb 15 at 2:52
Cross-posted from Stack-Overflow: Using Google Cloud Key Management Service to sign an Ethereum transaction
Awarded Feb 13 at 5:04
Deploy contract to Kovan with brownie and infura
Awarded Feb 11 at 22:50
Does using web3.eth.personal.unlockAccount(..) send the password for the account as plaintext to the provider?
Awarded Feb 11 at 13:11
How is it possible for Centre and the like to blacklist Ethereum addresses when they themselves are not miners/validators?
Awarded Feb 10 at 20:21
Life cycle of ERC-20 token: how to modify token in the future
Awarded Feb 10 at 0:47
Ganache Invalid JSON RPC response: “”
Awarded Feb 9 at 19:21
Other ways of paying gas different than Ether?
Awarded Feb 8 at 12:41
Manually setting transaction fee when transacting using geth
Awarded Feb 7 at 16:17
Generating a private key from a single mnemonic
Awarded Feb 7 at 0:57
how to interact with an already deployed smart contract
Awarded Feb 6 at 16:47
Create different contracts in run-time
Awarded Feb 6 at 15:06
I got “sandwich attacked” on my transaction
Awarded Feb 5 at 16:30
How to get the price of a pair using only its symbol?
Awarded Feb 4 at 12:05
Restrict ERC20 transfer and reception to owners of a particular NFT
Awarded Feb 4 at 10:17
Web3 1.3 Contract method call returns empty string
Awarded Feb 2 at 9:55
Overclocking and Incorrect/rejected shares
Awarded Jan 31 at 22:43
ParseError: Expected ';' but got '(' emit sent(_from, _to, _value);^
Awarded Jan 31 at 19:10
Contract Polymorphism based on address type cast issue
Awarded Jan 31 at 15:18
How are gas refunds “payed”?
Awarded Jan 31 at 13:42
Metamask stopped innjecting Web3. How to inject Web3.js properly?
Awarded Jan 30 at 17:02
Following the Hardhat tutorial, I get this error: TypeError: ethers.getSigners is not a function
Awarded Jan 30 at 15:05
sending UNI to MataMask Wallet
Awarded Jan 30 at 13:25
Is the blockchain compatible between Geth and OpenEthereum(Parity)?
Awarded Jan 30 at 12:32
What is the point of using Smart Contracts instead of spinning up an EC2 instance and running the same code without blockchain?
Awarded Jan 29 at 17:17
What is the largest number that can be returned from a Chainlink Price Feed?
Awarded Jan 29 at 8:10
Is it possible to set up a mechanism in a smart contract that periodically iterates over a list without being triggered by a transaction? [duplicate]
Awarded Jan 28 at 21:57
Function calls in React to deployed contracts return nothing
Awarded Jan 28 at 17:40
How to make API calls to AWS Managed Blockchain using Nethereum?
Awarded Jan 28 at 13:31
29 Word Seed Phrase Recovery
Awarded Jan 27 at 5:51
BatchRequest() is a single transaction or many?
Awarded Jan 26 at 12:27
Can I use etherscan with my local development blockchain?
Awarded Jan 26 at 9:25
Trying to check if mapping exists, TypeError: Type uint256 is not implicitly convertible to expected type bool
Awarded Jan 25 at 19:46
How to call a function in parent contract from children contract?
Awarded Jan 25 at 12:05
Can't send a new transaction with a lower nonce while the previous one is still pending
Awarded Jan 24 at 18:48
How can the transactions to this address always adapt to have higher gas price than all the rest?
Awarded Jan 24 at 16:25
Etherscan API Get Balance - Decimals Not Showing In Response
Awarded Jan 23 at 21:02
History of Ethereum
Awarded Jan 21 at 4:17
Enum Error while following along a tutorial
Awarded Jan 20 at 21:35
error comparing numbers in smart contract (Big Number)
Awarded Jan 20 at 18:37
TypeError: tokenContract.symbol is not a function
Awarded Jan 20 at 15:51
How does “swap” work between ERC20 tokens? And what is “swap”?
Awarded Jan 20 at 11:03
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