Ethereum

nethermind node stuck at syncing states 96.5%

I have started syncing an eth node using nethermind, and initially, the state sync process was increasing by 1% every 10 minutes (in average) and it was downloading 1200kb/s of states data. Now that the syncing is 96.5% done the node syncing process has slowed down significantly. Now it takes ....

Benjamin Benjamin: 10 hours ago

Bitcoin

Is there a list of established sites that have started accepting Bitcoin?

Cross posted to Reddit (http://www.reddit.com/r/Bitcoin/comments/kruk6/is_there_a_list_of_established_sites_that_have/). I believe the Trade page (https://en.bitcoin.it/wiki/Trade) mostly has new sites, not a lot of existing ones. To me, any existing, established site that goes Bitcoin is worth more than ten new Bitcoin-accepting sites. ....

Amelia Amelia: 10 hours ago

Bitcoin

What is the fastest way to determine whether an address exists on the blockchain?

All I want is to determine whether a given address has ANY activity on the blockchain. I've seen projects like bitcoin-abe, which might work, but I wondered if there were a simpler way than using abe, or using a web service (I'll be querying too much for this option)? Thoughts ....

Isabella Isabella: 11 hours ago

Bitcoin

What is the total value of XRPs or the market cap of Ripple?

On bitstamp today, $1 = 225XRP. That makes 100 billion XRPs worth $450 million. Ripple's a payment system that can't be used to buy anything yet and it's transaction credits are worth half a billion. Am I missing something here? Why is the price so high? Edit: The price doubled ....

Henry Henry: 11 hours ago

Bitcoin

Bitcoin Mining on Office Network

I'm a bitcoin novice and i've read a bit about mining. It got me thinking that I could setup our office network to min bitcoin (obviously with permission) We have a centos linux server which is on 24/7/365 and we have 6 windows 7 machines which are on 8 hours ....

Charlotte Charlotte: 12 hours ago

EOS.IO

ABI file not generated

I have compiled a smart contract using eosio-cpp -o addbook.wasm addbook.cpp --abigen command. Compilation was successfull and wasm file got generated. But I cant find abi. eosio-cpp version is, eosio-cpp -v clang version 7.0.0 (https://github.com/eosio/clang.git 6b886302a11a8419b76e469794ff9d0c531a4b4b) (https://github.com/eosio/llvm 9a9ff09d4302331d3289fdf58a64213506b4aefb) Target: x86_64-unknown-linux-gnu Thread model: posix InstalledDir: /usr/opt/eosio.cdt/1.6.0/bin Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.9 ....

Benjamin Benjamin: 12 hours ago

Bitcoin

Gaming Bitcoin by generating millions of wallets

What’s to stop someone from gaming the system and creating millions of wallets, increasing their odds of accidental deposits? If nothing else you could conceive of a DOS attack of sorts, where the addresses are all burned up. This seems like a major flaw to me... regardless of how many ....

James James: 13 hours ago

Bitcoin

How to call JSON RPC API from C?

How do I make RPC calls from C? My question is related to the question: "How do I call JSON RPC API using C#? (https://bitcoin.stackexchange.com/questions/5810/how-do-i-call-json-rpc-api-using-c)" ....

Alexander Alexander: 13 hours ago

Bitcoin

How to: Check whether or not transaction inputs have been previously spent

Maybe I have overlooked it, but I think the "Bitcoin Developer Reference" does not specify how a miner has to check whether or not transaction inputs have been previously spent. How is it done? And espacially how is this enforced in the process? All I found is 5.2 "process" 2.) ....

Evelyn Evelyn: 14 hours ago

Bitcoin

Setting up Bitcoin Miner in a data center

I have been running Antminer S9 in my apartment. It is too noisy, to hot, and it ruins the ambiance of my home. So I did some research and found a data center that can host my miner. At home I access Antminer through my private IP through my router. ....

Charlotte Charlotte: 14 hours ago