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Ethereum : Recent Questions and Answers (Page 17)

Find answers to your questions about Ethereum or help others by answering their Ethereum questions.

How to use private blockchains in [email protected]?

I know this methodvar transaction = new Tx(rawTransaction, {chain:'ropsten'});I triedvar transaction = new Tx(rawTransaction, {chain:'192.168.XX.XX:8545'});But get Error: Chain with name 192.168.XX.XX:8545 not supported Any help with this is...

Asked on 08/26/2021

1 answer

Call few contract methods from another contract consistently

Can I call a few contract methods from another contract consistently in one block? The order of methods calls is important!if (contract.method1.value(msg.value)()) { contract.method2(someValue);}...

Asked on 08/26/2021 by Dmytro Zarezenko

1 answer

Please look over my contract for re-entrancy

I know the random number generator isn't secure and is susceptible to manipulation from miners and any advice on the method to generate random numbers will be appreciated. However, the...

Asked on 08/26/2021 by oBlox

0 answer

How to convert string to int

How do i convert a string into a int?here is my code: pragma solidity ^0.4.6;contract MyContract { string public a; ...

Asked on 08/26/2021 by Fadil

6 answer

The principle of geth checking whether a block has the highest total difficulty

How and when does geth check whether there is any block not with the highest total difficulty in chain and rollback? What is the principle of it?If the location...

Asked on 08/26/2021 by XLeo

1 answer

Using Ganache with an existing MetaMask account

I am attempting the Truffle "Ethereum pet-shop tutorial": http://truffleframework.com/tutorials/pet-shop I am in the stage where I am attempting to implement the smart contract on the local Ganache block...

Asked on 08/26/2021 by Kuyler007

3 answer

Securing --rpcaddr endpoint on Go Ethereum node

I have been connecting nodes to a PoA blockchain based server and the only way I could get it to work was to specify the server address in the geth...

Asked on 08/26/2021

1 answer

ERC20 Contract created but how to access those funds?

I have created a ERC20 token, and whilst creating a token Wallet my system got hanged, I can see the contract in Custom Token but its greyed out also I...

Asked on 08/26/2021 by user9624803

1 answer

mining requires access to the entire blockchain?

I am reading the white paper and confused by two sentences bellow: In the Section of Mining Centralization:... miners are required to fetch random data from the state, compute some...

Asked on 08/26/2021 by fluency03

1 answer

Numerical Value of Bools in Solidity

What is the numerical value of true and false? Presumably one is 0x0000000000000000 and one is 0x0000000000000001...

Asked on 08/26/2021 by DAnsermino

1 answer

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