User Zach

12 votes

3 answers

10k views

How to automatically get user's wallet info if they are connected but NOT show the metamask pop up if they are not?

asked Nov 2, 2020 at 2:21

10 votes

2 answers

16k views

Can someone explain 'signing a transaction' and how its different from sending ether?

solidity javascript

asked Sep 25, 2017 at 1:23

2 votes

1 answer

1k views

Trying to mint 721 tokens from external contract gives invalid opcode

solidity go-ethereum dapp-development erc-721

asked Feb 12, 2018 at 20:58

2 votes

1 answer

519 views

Revert on non-fungible token, when sending external call from second contract

solidity contract-development dapp-development

asked Feb 16, 2018 at 2:55

2 votes

1 answer

871 views

Web3 sending TX times out after 280 seconds because network lag

go-ethereum web3js

asked Nov 14, 2018 at 14:10

2 votes

1 answer

588 views

Cannot sign data using eth_signTypedData_v3 in coinbase wallet but can in every other dapp wallet?

wallets dapps signature

asked Dec 21, 2020 at 3:54

2 votes

0 answers

1k views

Web3 error: "value out of bounds" when passing in value for smart contract call

web3js javascript

asked Jan 19, 2021 at 2:26

2 votes

1 answer

2k views

Signing a message to sell NFT/token - what happens if you transfer the NFT later?

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asked Jun 26, 2020 at 16:40

2 votes

2 answers

23k views

Metamask shows "ALERT: Transaction Error. Exception thrown in contract code" but transaction succeeds without error

solidity metamask

asked Oct 8, 2020 at 1:26

1 vote

2 answers

873 views

Setting the address for a contract - within another contract

solidity go-ethereum remix

asked Feb 8, 2018 at 7:24

1 vote

0 answers

205 views

How to update multiple values in a mapping without a loop?

solidity mapping

asked Jul 21, 2020 at 16:47

1 vote

1 answer

258 views

Finding values within an Array/Mapping based off min and max values

solidity arrays mapping

asked Aug 7, 2020 at 3:19

1 vote

3 answers

2k views

How to dynamically load contracts data with their ABI from etherscan API?

go-ethereum ether javascript etherscan

asked Nov 6, 2018 at 7:08

1 vote

2 answers

1k views

How do I know if this fake token is ERC20?

solidity erc-20

asked Jul 14, 2017 at 4:24

1 vote

1 answer

277 views

Review my token? Everything 'seems' to work on the testnet. Any issues?

go-ethereum ether tokens

asked Jul 14, 2017 at 21:27

0 votes

2 answers

2k views

Help using and reading Arrays[] and mappings

solidity go-ethereum mapping

asked Oct 17, 2017 at 18:49

0 votes

1 answer

531 views

How would you generate this transaction hash?

web3js ethereumjs react

asked Nov 16, 2018 at 11:41

0 votes

0 answers

402 views

Remix never returns a transaction - but everything works - why?

solidity remix erc-20

asked Sep 11, 2019 at 4:39

0 votes

1 answer

225 views

How to pass quotes inside a string via remix?

solidity remix

asked Jan 31, 2021 at 12:17

0 votes

0 answers

59 views

Get a value of a nested mapping with only one key?

solidity remix gas mapping

asked Sep 21, 2021 at 1:46

0 votes

0 answers

14 views

How would you get total transactions submitted by an address to a specific smart contract?

web3js contract-development etherscan ethers.js

asked Jan 16 at 6:45

0 votes

2 answers

42 views

Implementing Luhn's Algo in Solidity?

solidity solidity-0.8.x

asked Apr 22 at 4:50

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22 Questions

How to automatically get user's wallet info if they are connected but NOT show the metamask pop up if they are not?

Can someone explain 'signing a transaction' and how its different from sending ether?

Trying to mint 721 tokens from external contract gives invalid opcode

Revert on non-fungible token, when sending external call from second contract

Web3 sending TX times out after 280 seconds because network lag

Cannot sign data using eth_signTypedData_v3 in coinbase wallet but can in every other dapp wallet?

Web3 error: "value out of bounds" when passing in value for smart contract call

Signing a message to sell NFT/token - what happens if you transfer the NFT later?

Metamask shows "ALERT: Transaction Error. Exception thrown in contract code" but transaction succeeds without error

Setting the address for a contract - within another contract

How to update multiple values in a mapping without a loop?

Finding values within an Array/Mapping based off min and max values

How to dynamically load contracts data with their ABI from etherscan API?

How do I know if this fake token is ERC20?

Review my token? Everything 'seems' to work on the testnet. Any issues?

Help using and reading Arrays[] and mappings

How would you generate this transaction hash?

Remix never returns a transaction - but everything works - why?

How to pass quotes inside a string via remix?

Get a value of a nested mapping with only one key?

How would you get total transactions submitted by an address to a specific smart contract?

Implementing Luhn's Algo in Solidity?