Questions tagged [exchanges]

places to trade ether with other currencies or assets

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19 views

Where to Purchase Ether as a Business [closed]

I have a business that uses ETH to facilitate transactions. We are NOT an institutional investor and are therefore using ETH as a currency, not an investment. Any thoughts on the easiest way to get ...
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1answer
80 views

List of Token Exchanges Available on Testing Network?

Found Kyber Network Token Exchange on Ropsten so far. Please share if you know more token exchanges available on any testing network for trading Tokens as a test.
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1answer
66 views

Ethereum Contract Scalability (Single vs Multiple Contracts)

I am writing a token swap contract on Ethereum Blockchain to manage ERC 20 token swap in an exchange. The Questions is that in terms of scalability, which of the following two options would be better ...
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1answer
80 views

How to obtain Rinkeby DAI?

I need to obtain Rinkeby DAI token with this token address: 0x8f2e097e79b1c51be9cba42658862f0192c3e487 I tried a faucet and https://rinkeby.uniswap.exchange/swap - both give me a different token (...
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Uniswap V1: Why does EthToTokenInput not refund overpaid ether?

ethToTokenInput on the Uniswap V1 contract converts all the sent ether to tokens and transfers the tokens to the recipient. Lets assume 1 ether buys you 3.9 tokens according to getInputPrice(). If ...
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1answer
806 views

Buy a small amount of Ethereum

I'm new in Ethereum, and I would like to buy a very smart amount of Ethereum. I want to learn more about ETH, and at the moment I would like to invest $10 or $15. Do you know any website where I can ...
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1answer
284 views

user api to exchange eth token and wallet address creating using code

Is there any API to help exchange ether or tokens online which will help in coding an exchange. For bitcoin one can generate a wallet address, is it possible to generate a wallet address for Ethereum ...
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19 views

The only way to obtain ether is generate the ether?

Hello i have a question : The only way to get ether is buying to another user has mining the ether ? let me explain my question, i know i can use coinbase or another websites to buy ether, but where ...
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1answer
55 views

How to create a token exchange for private blockchain?

I have requirement to create a exchange for my private blockchain tokens, where registered user can buy and sell tokens, and token price goes up and down on demand and supply. I have searched bit, ...
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1answer
1k views

ETH vs ETC on Dwarfpool and Poloniex?

Noob miner here, Does anyone mining on Dwarfpool know if they have updated to the forked code (ETH), or are we still mining Ethereum classic (ETC)? I currently use Poloniex as my intermediary wallet ...
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1answer
22 views

How do exchanges work internally?

Because EVM cannot watch events, we cannot send a token to an exchange and immediately get back some other token (EVM just does not "know" when it was send a token). As far as I understand, this is ...
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2answers
69 views

How to make token for exchange such as bittrex? I'm interested only in technical side of this question

Should I set a starting price for the token? Is there a source code for the token for trading on the exchange?
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1answer
640 views

Bitpay for Ethereum?

I'd like to help an organization accept Ethereum. However, they need a Bitpay-type service that sends them USD right away. I know they can just manually sell on Coinbase daily/weekly, but they can't ...
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2answers
24 views

Create token exchange by defining decimal values

I've just learned a lot about Solidity and decided to put it into practice. Something I truly don't understand is how I can bypass the limitations of this programming language. Assume the following ...
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1answer
58 views

Why does Ethereum need exchanges?

As I understand, currently the preferred way to acquire ETH (for investment purpuses) is through a third-party exchange service. Isn't ethereum all about executing smart contracts when a specific ...
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1answer
59 views

How does the large-scale crypto trade platform , just like Binance or Bittrex , track ETH and Token transfer in their every account over time?

I wrote some simple code with web3js to track an address/account's transaction in real-time. It works, but I think it is in poor performance or could consume too much cpu resources. sample code ...
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1answer
95 views

ERC20 with custom sale mechanisms?

Let's say I want to create a token, but I don't want this token to be exchanged too freely, in order to avoid too much of speculation (real estate for example). People willing to sell the asset will ...
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3answers
262 views

Is there any decentralized exchange with zero trading fees for ERC-20 tokens at the moment?

Is there any decentralized exchange with zero trading fees for ERC-20 tokens at the moment? All fees except gas fees should be zero. I already tried Bancor and Kyber but, as far as I can tell, they ...
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1answer
72 views

What is rpc and p2p code for Ethereum token? What to give as GitHub source code of an Ethereum token in exchange?

I’m new to Ethereum development. From ethereum token docs I came to know the process of deploying the token. But at some exchanges they ask for RPC and P2P port as well as the github source of the ...
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1answer
54 views

Can an Erc-20 token that I create on my Quorum be integrated with any cryptocurrency exchange (for example Coinbase)?

I have setup my own quorum blockchain network. If I deploy an ERC20 token contract with a coin name (say ABC), will I be able to list the coin in exchanges ?
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1answer
126 views

How to push reserved tokens to market after ICO

I have written a contract where 50% tokens are in reserve and owner wants to sale those tokens via Exchange. Should I add BUY function in contract to achieve this feature. function buy() payable ...
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1answer
40 views

Generating multiple deposite address for one account

I want to create something like a Crypto exchange, in which I need to generate different unique deposit addresses for each user, so they can send funds to their accounts while I can keep track of how ...
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20 views

How to trace transactions to get information about hot and cold wallets?

I am researching ways how to trace transactions to get data about hot and cold wallets of exchanges, gambling sites, cantors, mixers. What sources of data could I use? What algorithms and scripts ...
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6answers
273k views

How do I buy Ethereum with USD?

I am a complete noob at investing. I have never bought stock or invested in anything before but I have $300 I would like to turn into Ethereum. Could someone please tell me step by step how to ...
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3answers
320 views

Crypto exchanges comparison spreadsheet

Is there any website or online community maintaining a spreadsheet comparing the different crypto exchanges?
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Where can I get list of tokens that allow direct conversion to ether and not just from token to token?

Most tokens simply utilize the ERC20 functions transferfrom/transferto which just use some balances to add from one user to another - but what are the ones who allow you to: buy token cashout to ...
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1answer
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How to get exchange rates for testnets?

I would like to see what a PETH on Kovan is worth in DAI. How can you look for exchange rates on testnets?
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1answer
60 views

Do I need ETH in my exchange account to send out ERC-20 tokens to an external wallet?

I'm new into ERC-20 tokens. Let's say I buy an ERC-20 token in an exchange with USD. When I want to transfer that token to my own external wallet (say Nano S), do I need some ETH in the exchange (...
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2answers
337 views

Transaction stuck in “Pending”

I've sent some ETH from the Ledger Live app to an exchange but I only used 1 Gwei and now the transaction is pending. It's been 20 hours. Will the transaction run out of gas eventually or will it go ...
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1answer
349 views

What is DeFi decentralized finance?

What is DeFi? What are its core components? How to think about or picture "it"? Some of the parts are tokens, stablecoins (tokens with specific properties to reduce its volatility), and exchanges, ...
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3answers
93 views

How do online wallets store users' tokens?

Online wallets like Coinbase hold private keys for users. How does it work internally? Does Coinbase generate a private key/address for each of its millions of users and thus keep track of millions of ...
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3answers
110 views

Decentralized Exchange on Ethereum?

Is a decentralized exchange basically a smart contract that includes all the exchange functionality? Where is the engine?
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1answer
50 views

Trading ETH with lightweight Know Your Customer requirements

Clearly banks follow AML/KYC regulations. But every bitcoin exchange (Ethereum exchange) I've seen has registration requirements that are far in excess of any bank I've used. Gemini requires your ...
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1answer
137 views

Which exchanges are currently the best and easiest to list ERC-20 tokens on?

Which exchanges are currently the best and easiest to list ERC-20 tokens on? Hello, I am issuing ERC-20 tokens at the moment. Which exchanges are the best and easiest to list tokens on at the ...
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2answers
551 views

How to set and get marketprice of token in contract? [closed]

I am building a simple erc-20 token. I don't have an idea as how token price is setup. However, I need to get my token's market price inside another contract. If you see this example of token BOMB, it ...
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1answer
258 views

Generate random address for ERC20 Token deposit and consolidation?

I'm trying to implement a mechanism to generate random addresses for users to deposit ERC20 tokens and then consolidate the deposited tokens to a cold wallet address later, somewhat like what an ...
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1answer
1k views

Smart Contract with stable coin

Is there any stable coin, which can already be used with smart contracts? If not, is there a possibility to exchange a stable coin in real time into a smart contract feasible coin like ETH by help ...
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1answer
46 views

Launch ERC20 token [duplicate]

I have implemented the ERC20 interface and the token is ready. Next step is to list it on an exchange like kraken. What is the process ? What determines the initial value of a custom token ? What will ...
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2k views

Missing Ethereum transaction from Poloniex to MyEtherWallet [closed]

I have sent my transaction from Poloniex to MyEtherWallet and transaction showed up only for ten minutes and after that it disappeared completely without any trace of it. It didn't return to my ...
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2answers
119 views

Token with whitelisting on crypto exchange

we are planing to implement a ERC-20 token with whitelisting (only whitelisted addressees, can trade tokens). And we are planing to list this token on some exchanges. Is this possible? What must be ...
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1answer
65 views

ERC20 exchange support [closed]

how can you add support for erc20 tokens on your own exchange, so that users can perform transactions between themselves? There are many services that make it possible to work with BTC and ETH, but ...
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1answer
628 views

Cannot send ERC20 tokens because user has no ethereum

I have 1 wallet server but have many account address for each user, so when user want to transfer erc-20 token say OMG to another address(user) in the same wallet server, the system said can not ...
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2answers
2k views

Bittrex using smart contract address to get funds [ ERC-20] deposit

This question is not Just specific to bittrex, but i wanna know it in general that can any exchange ask its user to deposit tokens to a smart contract? I have been using ETH since a long time, i have ...
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3answers
1k views

How to monitor a large set of ethereum address for balance?

I am planning to build a system where users will get notified through an email and app notification if there was any change in their ether balance. I was confused how to monitor a large set of ...
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1answer
55 views

ERC20 Token management in a CEX

Imagine I create a new account on lets say KuCoin. I create a ether/erc20 address and I send an amount in ERC20 tokens to that address. KuCoin then sends that to their mainwallet. How do they do ...
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1answer
80 views

Smart Contract Tokens and exchanges?

Is there any special code you need so your token can be traded on exchanges example Binance? Right now its a pretty basic contact like Fixed Supply token. Or is it as long as the exchange(...
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1answer
21 views

Will there be an Ethereum Constantinople Fork coin and which exchanges would be supporting it?

There are reports of nodes that still haven't upgraded their Ethereum nodes and they are on the Ethereum Constantinople fork. Would a new coin exist and which exchanges have shown support for ...
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2answers
215 views

Constantinople hard fork and Ethereum based tokens

I have a question: Do we have to deposit all of our Ethereum tokens into some exchange before the Constantinople hard fork, otherwise our tokens will become worthless? Or we can leave our tokens in ...
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1answer
44 views

Just in time conversion to ETH in dApp

Let's say I want to facilitate transactions between two parties, and if there is one user who gives payment information, such as their bank account in USD, I'd like to exchange that into ETH ...
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2answers
1k views

How to receive ether in wallet address and forward to another address on successful deposit?

I want to implement a feature in which users will send ether to wallet address(0x123) and on successful deposit, it needs to automatically transfer to my cold wallet(0x983). I can able to achieve ...