Community Digest

Top new questions this week:

ETH2.0 Lightweight Clients?

Is it possible have SPV clients in ETH2.0? It feels like PoS cannot benefit from spv verification.

asked by Burak Keceli 4 votes

On Eth 2.0 how will smart contracts and other applications assigned to a shard? Will they stay on that shard permanently?

Trying to learn more about eth 2.0 here.

eth-2.0 sharding  
asked by MKAL 3 votes

Calculating Gas Fees with ETH

How are gas fees calculated in account based model coins like ETH? Let's say I own 10 ETH addresses with 0 starting balance. I receive 0.1 ETH payment from 10 people - each one sending a payment of 0....

transactions ether etherscan fees  
asked by S.O.S 2 votes

Open Ethereum Syncing

How do I know if openethereum syncing is done and what should I do next? This is what my current state looks like

synchronization openethereum  
asked by GuzikovShow 2 votes

Gas limit issue when transfer USDT

i have been asking by my client to save ETH when transfer out his USDT, he hope there is no or very little ETH left in his new USDT address. Please assume that USDT address has no initial ETH and next ...

gas-limit out-of-gas transfer usdt  
asked by Atlas Chiew 1 vote

How to continuesly fork mainnet on latest block

How do I keep the fork mainnet use the latest block using web3? I need to fork mainnet to latest block before I send the transaction What originally i do is just run the ganache fork command which ...

web3js ganache-cli  
asked by Marr 1 vote

Pros & Cons of Using the "wei" Method to Track User Deposits in Ethereum

With Ethereum it's notoriously difficult to accept deposits from many users due high operational costs for making new ETH addresses. On the other hand, if all users of a service send ETH to one ...

transactions ether fees  
asked by S.O.S 1 vote
answered by Lauri Peltonen 1 vote

Greatest hits from previous weeks:

How do I set up a private ethereum network?

I'd like to set up a local (private) blockchain that isn't connected to the wider internet so that I can deploy some test contracts. How do I go about doing that?

testnets private-blockchain testing  
asked by Ethan Wilding 53 votes
answered by Adrian Macneil 68 votes

How would I explain Ethereum to a non-technical friend?

I've recently attempted to explain Ethereum to several non-techy friends. My explanation usually involves starting with a comparison to Bitcoin, but this quickly becomes complicated as I then have ...

blockchain bitcoin  
asked by Richard Horrocks 104 votes
answered by Taylor Gerring 47 votes

How to select a network id or is there a list of network ids?

We're starting a new open network based on the Ethereum protocol. The question is how to allocate a network id for the new network. In Ethereum we have main net, four test networks, classic with test ...

go-ethereum parity genesis  
asked by Igor Barinov 49 votes
answered by Afr 97 votes

Cannot allocate big buffer - Not enough graphics memory?

I am using Claymore's Dual Ethereum v9.5 Here is my config file: setx GPU_FORCE_64BIT_PTR 0 setx GPU_MAX_HEAP_SIZE 100 setx GPU_USE_SYNC_OBJECTS 1 setx GPU_MAX_ALLOC_PERCENT 100 setx ...

claymore nvidia  
asked by user6800816 11 votes
answered by Badr Bellaj 8 votes

What caused this error: Attempting to run transaction which calls a contract function, but recipient address is not a contract address

I have a contract and a set of mocha tests. I recently switched from using the ethereum client that comes with truffle (the one you get when you run truffle develop) to the ganache-cli. Somehow, in ...

truffle-migration clients  
asked by Alex Altair 36 votes
answered by Alex Altair 31 votes

What is the total supply of Ether?

In Bitcoin, the total supply is capped at 21 million BTC. Is the total supply of Ether capped? How much will be mined before the Proof of Stake (POS) transition, and how will POS affect the issuance ...

mining ether proof-of-stake proof-of-work  
asked by Tjaden Hess 85 votes
answered by niksmac 43 votes

Is there a way to generate ethereum paper wallets?

Is it possible to store ether on paper wallets or generate printable private keys offline somehow?

security cold-storage paper-wallets  
asked by Afr 27 votes
answered by Afr 16 votes

Can you answer these questions?

Solidity - Proper way to Import Contracts

When importing one Solidity contract into another, what’s the difference between importing it and accessing it using the is keyword, vs. importing it and just instantiating an object of it? Here’s ...

solidity go-ethereum blockchain erc-721  
asked by Mark55 1 vote
answered by Soham Zemse 0 votes

What unit of time is used to calculate downtime penalties for Validators?

Is the penalty a function of the number of blocks you missed or is it calculated in some time unit like seconds?

proof-of-stake validators  
asked by Damian Siniakowicz 1 vote

Solidity variable definition: (bool sent, )

In Solidity, this sentence: (bool sent, ) ={value: _amount}(""); What is the sense of that "," after sent variable? Any link to offcial documentation? Many thanks.

asked by Kevin Flynn 1 vote
answered by Morten 0 votes
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