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Questions tagged [exchanges]

places to trade ether with other currencies or assets

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0answers
22 views

Calculate exchange rate

I am running am ethereum node and I'd like to calculate the exchange rate of any token into USD, without using any external API. How do i accomplish this?
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1answer
91 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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19 views

How to obtain the price for Uniswap v2? [closed]

I am using Uniswap v2 from my DApp. How to obtain suitable prices: amountOutMin and the "expected" amountOut having amountIn (both for ETH -> token and for token -> token swaps) and ...
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1answer
86 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
844 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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19 views

Could there be multiple asset pools In a DAMM liquidity pool?

In a DAMM (dynamic automated market making) DEX (decentralized exchange) the ration between two assets, e.g. DAI/ETH does not have to be 50/50 anymore, like it used to be in a AMM, (automated market ...
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7 views

IERC1155Views - whether and how to use it?

Do I need to have IERC1155Views interface in my ERC-1155 contract to determine the number of decimals after the dot for the exchanges? If I don't specify IERC1155Views, what number of decimals will ...
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1answer
296 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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1answer
83 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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5 views

Is there any connection between Serenity Market and Ethereum 2.0 (codename Serenity)?

From what I gather, no... Simply an exchange that's named the same? https://serenity.exchange/
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2answers
74 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
643 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
514 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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2answers
29 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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2answers
55 views

What are some limitations of decentralized exchanges? [closed]

The question is whether the decentralized exchange is lame or profitable ? I got a good review on this matter : https://cryptogeek.info/en/blog/decentralized-exchanges-pros-and-cons. Actually, I think ...
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0answers
18 views

How exchanges handle token withdrawals for their users?

I am working on exchange-like project for ETH and ethereum-based tokens. And I am having a problem with token withdrawals for users. Every user certainly makes a deposit to his own newly generated ...
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0answers
18 views

Is there an ERC for exchange deposits or merchant deposits?

The title is the question. I have searched for any discussions of similar topics, but after looking at various CEX platforms across the world, most are just generating a bunch of keys and doing value ...
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0answers
276 views

Is it required to use multiple Etherem accounts to send transactions on behalf of customers to avoid pending transactions?

We are developing an Ethereum based exchange. In our project, customers put their orders to send ETH or ERC20 tokens to others, and we currently do these transactions via our Ethereum account on their ...
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1answer
66 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 ...
3
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1answer
110 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
353 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
19 views

how to check instantly when a user charges amount to his address generated by our app

Our app needs to detect and create a charging order asap whenever a user charges an amount of ETH/USDT(ERC20). Due to the limit of infura API, we decided to set up our own ETH nodes and use JAVA to ...
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1answer
97 views

How to build an Ethereum hot wallet for an exchange

I’m developing an exchange. When a new user register on website we will create new eth wallet for them. When they deposit USDT on their wallet how can I transfer that USDT amount to another address (...
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129 views

Exchanging tokens to ETH using Uniswap (v1)

I am trying to create a simple function that buys a token from uniswap (v1) and then immediately sells the token back to ether. I am able to buy successfully but when adding the calls to the sell ...
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1answer
129 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
24 views

Correct approach of replicating smart contract balances

We are storing user balances on smart contract and as well as on our local db, so that we dont always have to query blockchain for user balance. For this we use contract events to update balances ...
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0answers
19 views

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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0answers
22 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
44 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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1answer
61 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
76 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
86 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
66 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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0answers
21 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
328 views

Crypto exchanges comparison spreadsheet

Is there any website or online community maintaining a spreadsheet comparing the different crypto exchanges?
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0answers
9 views

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
22 views

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
103 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
884 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 ...
4
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1answer
511 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
112 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
124 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
52 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
146 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
795 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
328 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
58 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 ...