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Questions tagged [ethereum]

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

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224 views

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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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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82 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 ...
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2answers
78 views

Is there an efficient way to get the last 200 blocks (BTC, LTC, ETH)?

I am looking for an efficient way of getting the last 200 blocks and being able to pull all transactions related to an address. I would like to do this for BTC, ETH, and LTC. Is there any way to ...
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1answer
110 views

bitcoin block size and etherenum gas limit

I understand that bitcoin has a fixed block size (1MB). On the other hand, Etherenum does not seem to have a fixed gas limit. (https://ethereum.stackexchange.com/questions/1106/is-there-a-limit-for-...
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1answer
92 views

What's the point of ETHLend?

I am trying to understand what the idea behing a site like ETHLend is. IIUC, I can borrow coins for an interest, the same way I could borrow a traditional currency from a bank. That part is easy to ...
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1answer
35 views

Can a cryptocurrency be liquid while it is in its pre-sale, or even ICO

I am planning to run a Coin's ICO for several years, not interested in the gains to be made from selling out ICO in 3 days NO, but interested in using the COin to end Global Poverty as i deem fit. So ...
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36 views

Displaying price in ETH based on USD exchange rate [duplicate]

How do i get the ETH rate in USD, and stored in a variable in php?
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379 views

How to exchange bitcoins held in electrum to ethereum?

How to exchange Bitcoins to Ethereum through shapeshift.io or changelly.com, from Electrum bitcoin wallet to Jaxx ETH wallet? In electrum wallet do I need to subtract the Bitcoin mining fee manually, ...
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1answer
103 views

Crypto currency as gift

I'm staying in Germany and I have a friend in India. He has a few ether coins in his wallet in India which he bought mid of 2017. He now wants to sell them. But in India, because of taxes, he will ...
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2answers
453 views

Where can I find On Balance Volume for bitcoin? (or ETH, LTC?)

I recently read about the usefulness of On balance Volume (OBV) in predicting price movement. I use GDAX and don't think it has OBV. (Or is there?) Any exchange that displays OBV? Thanks.
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781 views

How are ERC20 tokens sold in an ICO before being listed on exchanges?

In many places you see talk about tokens being listed on exchanges AFTER being sold in a successful ICO. How was the token sold during the ICO? Did the buyers transfer ETH / BTC to some addresses and ...
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1answer
251 views

How to send Ethereum from a “paper wallet address” to another address using an API?

I have an "Ethereum Paper Wallet Address" and this address has $5 USD amount of Ethereum. I want to transfer that ether to another Ethereum address using an API. Please let me know if any more ...
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1answer
90 views

Applying blockchain in telemedicine app involving 'video sessions with doctors' for more transparency

PS: there was no 'Blockchain' community so I'm posting the question here. Hi, I am very new to blockchain but understand the basic underlying concept of blockchain. I can understand application of ...
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1answer
257 views

Cancelled: You need some ETH in the same address as your token to pay the gas to send it

I have a problem in exchanging my altcoins, when i tried to convert TokenCard to Ethereum it is showing the following message: Cancelled: You need some ETH in the same address as your token to pay ...
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1answer
91 views

Better Crypto Currency for trading [closed]

Can anyone suggest me which crypto currency is better for trading? Is it Bitcoin or Ethereum? Prices in USD as of 21/08/2017 and time 18:03 (UTC+05:30): Bitcoin = $4041.53 or Ethereum = $325.76
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2k views

Transfer Bitcoin from between two different wallets

In my application i want to received payment from different user. Each user may use different wallets like mycelium, jaxx and many more... My application's wallet is in coinbase, is it possible to ...
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1answer
506 views

Bittrex Market History Confusion

So I recently made a very small test order of Digix DAO in the Ethereum market (Using bittrex), and I noticed that it showed up in the Market History section. It looked a little like this (NOT EXACT) ...
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1answer
37 views

Can multiple small graphic card memory collect more mining hash rate

If I set multiple 3GB GTX 1060 , It can generate more hash rate than single GTX 1070 6GB. Can I still mining ETH by this 3 Gb cards when the bloCk size of eth is over 3 Gb. EXPLAIN ME.
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What factors decides the number of tokens to generate?

Tron has decided to generate 100B tokens with some initial price? What parameters do these centralised crypto owners consider before deciding the number and price of tokens?
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1answer
2k views

how much Mh/s is 15000 h/s?

) Question: When Genesis is writing 15000 h/s for 12000usd what is that in Mh/s? I plan to mine Ethereum at the speed of 15000 h/s which is the fastest speed you can buy at Genesis. Then I intend ...
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1answer
52 views

What are the biggest Proof-of-Stake roadblocks? [closed]

What are the biggest hurdles (technological or otherwise) that the Proof-of-Stake consensus algorithm must overcome to become the de facto consensus algorithm for blockchain? Or put differently, what'...
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1answer
102 views

Receiving payments from users for over 150 coins

I would like to receive cryptocurrency payments for bitcoin, ethereum, ripple, stellar and over 150 different altcoins via my website. Similar to a cryptocurrency exchange such as Binance, I would ...
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1answer
69 views

What are options to store bitcoin or ethereum in different types of places?

I know to option to store bitcoin. 1) A wallet 2) A exchange but both are unsafe As far as i know wallet save the coins offline in your phone and hence if you break your phone or lost it coins are ...
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1answer
2k views

Need Guide: what is the hashrate for ZOTAC P106-100 6GB GDDR5? [closed]

One vendor is offering 20 GPUs and each $224.00 . Is it good card for mining ETH and what is the best hash for this? Please let me know your experiences. Is it worth to buy for ETH or other coins?