Recent questions tagged ethereum

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ethereum - cannot connect client app with web3js to metamask

I am a dapp beginner. This is a demo app for a todolist I am unable to get a connection to the ... .com/questions/65866291/cannot-connect-client-app-with-web3js-to-metamask...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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ethereum - TRC20 Token Exchange

Everybody. I'd like to develop DEX project which can exchange my own TRC20 Token with TRX or USDT. I ... from:https://stackoverflow.com/questions/65868315/trc20-token-exchange...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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950 views

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ethereum - Do not enter function if address is contract , owner and set address

I dont want to enter function when one of those addresses i mean contract owner , contract itself or set address1 ... -enter-function-if-address-is-contract-owner-and-set-address...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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960 views

1 answer

ethereum - How to synchronize the Raspberry PI with the private blockchain?

I wanna create the private ethereum chain by geth, and I've started the node successfully and created the ... /how-to-synchronize-the-raspberry-pi-with-the-private-blockchain...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

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ethereum - TypeError: Cannot read property 'eth' of undefined

Closed. This question needs to be more focused. It is not currently accepting answers. question from:https: ... /questions/65921232/typeerror-cannot-read-property-eth-of-undefined...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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ethereum - Web3.js Admin with IPC

I'm using web3 and web3-eth-admin library with Node. Up till now I had zero problems using the websocket ... :https://stackoverflow.com/questions/65924105/web3-js-admin-with-ipc...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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926 views

1 answer

ethereum - Sort array from greatest to smallest but unique addresses

I want to sort array i use this code i found here and now i wonder how to add option to check if ... /questions/65944007/sort-array-from-greatest-to-smallest-but-unique-addresses...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.2k views

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ethereum - What is address(0) in Solidity

Can anyone explain to me what address(0) is in Solidity? I found the following in the docs but it ... https://stackoverflow.com/questions/48219716/what-is-address0-in-solidity...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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ethereum - Get all etc accounts in Metamask (version 9.0.4)

According to docs (https://docs.metamask.io/guide/getting-started.html#basic-considerations) I need to use eth_requestAccounts ... get-all-etc-accounts-in-metamask-version-9-0-4...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

ethereum - 无法启动Quorum的Tessera节点(Unable to start Tessera node for Quorum)

I have set up Quorom 3 nodes by following the guide and now I am setting of the Tessera nodes for the 3 nodes. (我已按照指南设置了 ... . (任何帮助都是非常可观的 ) ask by Srikant Sahu translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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992 views

1 answer

ethereum - 无法启动Quorum的Tessera节点(Unable to start Tessera node for Quorum)

I have set up Quorom 3 nodes by following the guide and now I am setting of the Tessera nodes for the 3 nodes. (我已按照指南设置了 ... . (任何帮助都是非常可观的 ) ask by Srikant Sahu translate from so...

asked Mar 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

973 views

1 answer

ethereum - ERC20: transfer amount exceeds allowance

I have two smart contract MLM and Token. After registration in MLM smart contract, I have to transfer token from ... referrerAddress, level); } } if (users[referrerAddress].x6Matri...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

ethereum - Solidity constructor declaration and statements between function signature and visibility modifieres

I just came across this in a Solidity contract, I don't understand it. Specifically I don't understand how ... = _verifier; operator = _operator; denomination = _denomination; }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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922 views

1 answer

ethereum - Execute TX specific block.timestamp

I'm looking for a quick help, I have a smart contract with a function including "require (block.timestamp > ... or pointers where I need to search for more information :)...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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4.4k views

1 answer

ethereum - payable() function In solidity

I dont really understand payable() should i use contract(){ receive() { somefunction() } somefunction() payable ... functions with modifier payable can you give me some examples?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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