Questions tagged [exchanges]
places to trade ether with other currencies or assets
191
questions
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0answers
4 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/
2
votes
2answers
49 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 ...
0
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0answers
16 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 ...
0
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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
66 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 ...
0
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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 ...
0
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0answers
51 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 ...
1
vote
1answer
73 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 (...
1
vote
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 ...
0
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0answers
17 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 ...
0
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0answers
21 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 ...
0
votes
2answers
238 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 (...
0
votes
1answer
38 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 ...
1
vote
1answer
72 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, ...
0
votes
1answer
78 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 ?
1
vote
1answer
56 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 ...
0
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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 ...
0
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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 ...
0
votes
1answer
84 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 (...
0
votes
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?
3
votes
1answer
426 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, ...
1
vote
2answers
744 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 ...
0
votes
1answer
80 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 ...
0
votes
2answers
652 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 ...
0
votes
1answer
54 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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3answers
122 views
Decentralized Exchange on Ethereum?
Is a decentralized exchange basically a smart contract that includes all the exchange functionality? Where is the engine?
1
vote
2answers
143 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 ...
0
votes
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 ...
0
votes
1answer
145 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 ...
0
votes
1answer
70 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 ...
0
votes
1answer
60 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 ...
1
vote
1answer
86 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(...
0
votes
1answer
25 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 ...
1
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2answers
220 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 ...
0
votes
1answer
48 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 ...
0
votes
1answer
24 views
Can solidity alone suitable for ICO project?
I know solidity codes and coded one smart contract.I want to know is if I want to list this contract on one exchange.is it ok or not.
can this exchange accept this codes to exchange with other coins?
0
votes
1answer
36 views
Can ERC20 tokens be traded on other blockchain based decentralized exchange?
I have a quick question to ask from you.
can we trade erc20 tokens on decentralized exchange which is built on custom replica of ethereum blockchain or you can say on a fork of ethereum blockchain. ...
1
vote
3answers
324 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 ...
2
votes
1answer
290 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 ...
1
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1answer
86 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.
0
votes
1answer
32 views
How to prevent a token from being exchanged freely
Let's say that I have created a token and this is distributed through a smart contract. Let's assume that this token is not on any exchange and whenever a transaction is executed using this token a ...
0
votes
1answer
69 views
copy etherdelta code [closed]
For a test project, I need to write the etherdelta's contract. but "function EtherDelta (address admin_, address feeAccount_, address accountLevelsAddr_, uint feeMake_, uint feeTake_, uint feeRebate_) ...
0
votes
1answer
111 views
How to use Ethereum as a database for an order book? [closed]
I hope this question is not too general. I would like to have a few opinions.
What is the best way to work with data in Ethereum? Lets say we build a decentralized exchange on a small scale. How ...
0
votes
2answers
501 views
How does token exchange buy and sell ERC20 tokens technically?
I am new and self studying how ERC20 token and smart contract works. After reading through some documents and blogs about creating token and ICO smart contracts. I have questions about how people ...
1
vote
1answer
520 views
How do exchanges transfer tokens from user wallets?
I am wondering how exchanged like Binance are able to transfer out tokens from user wallets that have no ETH in them?
For example if I create a new binance account and say I transfer ADA from ...
1
vote
1answer
492 views
What determines the price of the ERC-20 token on a trading exchange?
I know that ERC-20 tokens are traded in pairs on the trading exchanges, but what essentially determines the price in USD? I would like to know if there's a specific algorithm that does the calculation....
1
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0answers
131 views
how do you handle token value data type in database?
Ones who do exchange / Investment platforms development, all ERC20 tokens has its atomic unit and only moved by specifying value in its atomic form.
for eg: 1 BuritoToken with unit decimals as 18, ...
0
votes
1answer
21 views
ETH transfer help
Hi I have opened my first coin wallet - metamask.
I have bought ETH through here and now tried to send to Binance to buy BAT.
I just wondered how long it usually takes to transfer ETH as it seems to ...
0
votes
0answers
580 views
Error: VM Exception while processing transaction: revert due to require statement
I am new to ethereum world and trying to get some practise through my MSc Project. I am attempting to create an ethereum application for trading electricity. The contracts are the following:
pragma ...
0
votes
1answer
674 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 ...
