Questions tagged [ethereum]

A blockchain-based "smart contract" system with a Turing-complete contract programming language. Questions about Ethereum can also be asked on the dedicated Ethereum site: https://ethereum.stackexchange.com.

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Real bitcoin buying versus forex speculation [closed]

so I had a discussion with the colleges today and I would that my arguments would be verified here. Basically the question is what are the differences between buying and selling real cryptocurrencies ...
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868 views

Can Ethereum support compressed secp256k1 public keys to compute Keccak addresses?

Starting from a private key, a working functional example provides details for how an Ethereum address can be calculated from an uncompressed secp256k1 elliptic curve public key. This functional ...
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eth says I have a balance of 35 ether - etherchain can't find my address

In the ethconsole I get the following: > web3.fromWei(web3.eth.getBalance(web3.eth.coinbase), "ether") 35' When I run web3.eth.coinbase and enter the resulting 0x00f24... address into https://www....
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586 views

What are realistic expectations for an ethereum miner on AWS? [closed]

I've configured the large (8x) GPU image on AWS at 2.60/hour. I ran it goes few hours after setup and mined nothing. This was my first foray into mining. Does this size instance give me a ...
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57 views

How does using a Turing-complete programming language compromise the security of the network? [duplicate]

I have read many places that the decision for Ethereum to use a Turing-complete programming language sparked a lot of concerns over security. From my understanding, not using a Turing-complete ...
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670 views

Ethereum Code bots…Scam or not?

So new I cant even afford to trade crypto's yet, but looking and learning. I came across some Ethereum Code bot, promising 13k a day etc etc...one of those "sounds to good to be true" things really. ...
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106 views

Etherium based tokens [closed]

When we say certain crypto currency is based over etherium, for instance TRON, does it mean they have used etherium code from github and modified as per their use case? Or is it something completely ...
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How does blockchain technology handle the actual transaction data?

My understanding of how a transaction is secured in blockchain, especially in bitcoin, is that the output of transaction data is locked to the recipient's address (a shorter version of his public key)....
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Is it true that colored coins or digital assets (counterparty / ethereum / nxt assets / etc.) have an issue of paying fees?

I'm looking to setup my own digital asset or coin on either counterparty or nxt assets or ethereum to distribute to my loyal customers, but I noticed that even if I created an account for my customers,...
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71 views

Generator Point G multiple

if in a curve y2 mod p = x3+ 7 mod p ( ecdsa-secp256k1) p=115792089237316195423570985008687907853269984665640564039457584007908834671663 G=...
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315 views

Are there Ethereum API wrappers? [closed]

I'm looking into developing some Go software on Ethereum and I'm wondering - are there any API wrappers around for Ethereum (something like BTCSuite's BTCRPCClient is for Bitcoin)? I know there is a ...
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125 views

Decentralized product inventory (instead of simple orderbook)

I am thinking of creating a decentralized market place with public bidding. AS far as I have researched all cryptocurrencies and such only offer public ledgers with simple orderbooks. The only data ...
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41 views

how to embed coin prices of my choice in my website [closed]

sorry for bad english, let's just say i want to embed specific price of coin for example ethereum and bitcoin $20 price in my website, in other words it shows $20 rate of btc and eth on my website not ...
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40 views

Ethereum's PoW difficulty

Bitcoin's block time is about 10 minutes while that of Ethereum is 15 secs. Both are using PoW at this moment, right? How come Ethereum's block time is so short compared to Bitcoin? Is hashing a lot ...
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62 views

How are Bitcoin generated in Video Games?

There are a lot of video games out there which reward the player in Bitcoins or other cryptocurrencies for winning the game or achieving a specific objective. But from where does those crypto come ...
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2k views

Radeon RX 580 8GB vs 4GB. Does memory matter?

Does GPU with more memory provide better mining for Ethereum? Here is a Quora an answer: In general, 4GB is sufficient for even the most demanding hashing algorithms and you will not see any ...
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2answers
159 views

Is there a chance to return all of the lost money invested when the chart goes back up? [closed]

Let say, for example, I invested $3 to buy 21 TRX (Tron Tokens), usually a token under Ethereum platform but still working the same as other altcoins when the value goes high, where the price is ...
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134 views

Even though Blockchain is tagged as “ Decentralized”, wouldn't the organization actually implementing the Blockchain like Ethereum control it?

For example, If I were a business that would want to use the Ethereum Blockchain technology to shift my business to Blockchain, wouldn't Ethereum be in control of the actual underlying Blockchain ...
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996 views

Coinhive for bitcoin/ethereum

I know that CPU mining wouldn't pay for electricity bill, but what if some sort of CPU miner was deployed to a website? Similarly to CoinHive with Monero. Would such mining make sense? I started ...
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1answer
88 views

How many proof-of-work algorithm exists for crypto currencies?

How many proof-of-work algorithm exists for crypto currencies ? We know PoW in Bitcoin and Etherium are different. Is there any other algorithm used for crypto currencies ?
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80 views

How does ENS prevent frontrunning attacks?

Namecoin uses commitments to hide the domain. ENS uses simple hash, which is not hiding.
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2k views

When are you charged a withdraw fee?

I'm a bitcoin newbie and think that I am missing something. I'm based in Australia although I'm not sure if that matters. I would like to buy and hold for an extended period some bitcoin and ether. ...
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29 views

Data for time a transaction spent in a pool before it got added to a block

Is it possible to collect data for when an transaction was added to the pool to when it was added to the block?
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1answer
43 views

How to connect to blockchain via a “rig” miner? [closed]

I would like to connect the following rig (please see the photos) to a blockchain platform (I prefer a platform which is simpler to use :) ). Maybe this rig would not be appropriate for Bitcoin, but ...
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1answer
96 views

Differences/similarities of “Bitcoin script” and “Ethereum smart contract”?

Can we compare Bitcoin script and Ethereum smart contract ? And if yes, What are differences/similarities of Bitcoin script and Ethereum smart contract in sense of functionality, architecture and ...
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19 views

Is there such a thing as an “ERC20 compatible Ethereum address”?

I believe the answer to be no, but just asking here to confirm. I think the answer is that it is just the software interacting with the address that is ERC20 compatible or not, not the actual address....
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Would it be possible to create a blockchain that uses only X+ active blocks?

Every blockchain has a beginning, the Block 0 or also known as "Genesis Block". But wouldn't it be possible to have a blockchain or a coin, where only the last 1000 blocks are saved and 1001+ get ...
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32 views

Ethereum in Trezor

I understand that each of Ethereum addresses in Trezor represents standalone Ethereum account. But doesn't this bring problems with sharing funds between your accounts? If 100 people send me 1eth on ...
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204 views

Token vs contract - are they the same?

The Ethereum ERC20 token is also the contract. The token can never live without the contract. The name of the contract is the name of the token. In the code, the keyword is contract and not token. I ...
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44 views

How can we use Blockchain for Land Registration Use Case?

How and where can we integrate Blockchain in this use case? Say buyer and seller visits the registration office with sale deed they prepared. The details in the sale deed is compared by the ...
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1answer
204 views

Questions about blockchains, network trust and why becoming a node? [closed]

everyone, I'm a software developer and I'm striving to understand the concepts behind blockchain and the projects running on them. I'm not sure if this is the correct place to ask these questions, ...
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1answer
465 views

Why is Ethereum total network hashrate still increasing if there are no GPUS to buy?

The total Ethereum network hashrate is close to doubling relative to its December level. Mining difficulty is also increasing proportionally of course as the total reward per block stays the same. ...
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497 views

How to connect existing MEW to Trezor?

I have got my new Trezor but I don't know how to connect my existing myetherwallet to trezor ether address ? Is there any way I can directly import and connect to trezor ? Or I have to create a new ...
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Current transaction fees for various cryptocurrencies

Is there a place that lists current transaction fees for various cryptocurrencies like Bitcoin, Litecoin, Ripple, Ethereum, Bitcoin Cash etc.? The best would be fees converted to some fiat (USD, EUR) ...
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350 views

How to exchange a cryptocurrency from an address that's not in a wallet

Possibly dumb question here (and first-time poster). I have a Coinbase account with several different cryptocurrencies in it. I recently used ShapeShift to exchange ether (ETH) from my Coinbase ...
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2answers
106 views

Is there a difference in buying coins with bitcoin or etherum?

So today I decided to throw my hat into the ring and bought some stellar lumen coins. Since bittrex is not currently accepting new accounts I decided to go with poloniex. Poloniex doesnt offer ...
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1k views

How does Exodus wallet (or other wallet) exchange bitcoin to other cryptocurrency?

I have been using Exodus wallet for a very short time. And it shows that I can exchange bitcoin to many other cryptocurrencies and wise versa. I still couldn't find a good answer on how this exchange ...
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297 views

How to create Ethereum brain address? [closed]

I have used bitaddress.org to create a brain wallet for my Bitcoin. Now I would like to create a brain wallet for my Ethereum using Bitcoin Improvement Proposals (BIP) 32/39/44/49 technologies. Is ...
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247 views

Why Ethereum is growing in USD but decreasing in BTC?

Please explain to me why the ETH/BTC price is decreasing but ETH/USD price is increasing. How does that work? Why it costs less in bitcoins but more in USD?
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199 views

Crypto Mining with PC

I have PC - i7-6700K CPU @ 4.00GHz & graphic: Intel Corporation HD Graphics 530. My Os is Ubuntu. How many Mh/s i could receive for Ethereum? Let's assume the current is free.
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207 views

Which wallet can I use to store all my cryptocurrencies ?

I'm new to cryptocurrencies and I would like to store all my currencies (I read here and there that it is not safe to store everything on Coinbase). So I tried Coinomi which seems quite good but is ...
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477 views

Can someone show me an example rootstock smart contract that is the equivalent of an Ethereum Smart Contract?

Coming from Ethereum, is there an example rootstock smart contract code that is the equivalent of an Ethereum smart contract code?
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104 views

Relative licensing restrictions of Ethereum and other projects- Open Source?

Is Ethereum open source? I've heard different things from different people. Stephan Tual has written: "Everything at Ethereum, including our website, our tools, our whitepapers and of course our ...
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2answers
591 views

Ethereum: Cannot use master password on Ethereum wallet

Ethereum. I love the ideas behind it and it's exciting and such... but damn if this isn't the most user unfriendly thing I've ever seen?! So a while ago, with a view to begin mining ETH on my GPU, I ...
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How to validate derivePath for HDWallet?

I am generating addresses for HDWallet while importing account using the Mnemonic Phrase. So I am letting the user enter Mnemonic Phrase and derivePath both. Before generating addresses, I want to ...
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29 views

“Ether” vs. “bitcoin”: I wondered when I heard Ethereum does NOT have any crypto-currency (in a Blockchain workshop by speaker)!

In my opinion, Ethereum has a native coin (crypto-currency) called "Ether". On the other hand, Ethereum allows user to create crypto-token, such as ERC-20, using smart contracts. From my point of ...
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What does “mix hash” mean in the genesis.json?

Whenever I deployed my Ethereum test net, I usually typed 'genesis.json' from the example code. In this point, all I want to know is the difference between difficulty and mix hash. I know that ...
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api limit workaround

Are there any ways to avoid limitation for api calls (5/sec)? I need the info about transactions and balance (of certain account), UTXOs and the ability to broadcast my transaction. Currently I am ...
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1answer
28 views

Blcokchain corrupt ledger

What happen to the node if we find that node on blockchain has corrupt ledger? Is the ledger sync with other ledger or get discard.
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66 views

Create wallet address on user registration for trading platform

I am creating a crypto-trading platform . I wanted to know how to create wallet address dynamically for all new registered user and also create new address for every transaction. I am using bitcoind ...