Questions tagged [exchanges]
places to trade ether with other currencies or assets
206
questions
0
votes
1answer
59 views
Why isn't Polka Dot listed for trading on Uniswap?
Uniswap is the leading decentralized exchange for many ERC20 tokens. DOT is an example of such a token I'm guessing since it's a self-declared complementary extension of the Ethereum ecosystem, so why ...
0
votes
0answers
20 views
Solidity contract: How to deal with return parameters in solidity
i am having an issue with an function I would like to call.
Following case:
The function looks like this:
Params
Type
token0
IERC20
token1
IERC20
amount
uint256
parts
uint256
flags
uint256
and ...
0
votes
0answers
21 views
Running Ethereum Exchange (including ERC 20)
Would it make sense to run the app server and an Ethereum node on the same machine considering how closely they interact? Or should they be on separate machines to not affect each other?
What is the ...
0
votes
0answers
4 views
Is there any decentralized exchange to convert between eth and different chains?
I found most of the decentralized exchangers can only convert among erc20 tokens but cannot deal the btc or other coins running on different chains. Is there any that can deal with this?
0
votes
0answers
27 views
How to identify ether payments from an exchange?
I am building an application that accepts payments from its users. Nowadays, only users with a wallet can make withdraws to a smart contract address(mine). This is because each user has a single and ...
0
votes
0answers
16 views
how does exchange buy new tokens?
Question 1:
So, let's look at exchanges. Let's say I want to buy the token - OmiseGO (it's an ERC20) token.
I know that on the exchange, I can directly buy ERC20 token from someone like a trading ...
0
votes
1answer
11 views
How to handle forks, dropped/reverted blocks
I'm building an ethereum wallet, I've setup geth.
I'm planning to subscribe to new transactions on geth websocket, I can't figure out how to deal with dropped blocks and hardfork. let's say a user ...
4
votes
1answer
37 views
Is the Ethereum 2.0 price fixed to the old Ethereum permanently?
I read that it will be possible to convert one old Ether for one Ether 2.0 but not vice versa.
Is this correct and does the algorithm guarantee this "exchange rate" forever (and thus protect ...
0
votes
1answer
24 views
withdraw Ether from an exchange to a smart contract…!
ralated to this topic Can I withdraw Ether from exchanges to a contract wallet?
I have a question that how exchange understand which address is a contract and how doesn't pay gas more than 21000...?
0
votes
1answer
30 views
Why addresses from the exchanges do not show on Etherscan?
I have some ether in an exchange but when I searched it on etherscan.io it is showing
There are no matching entries
there I got to know exchanges have the balances on their own wallet address, but ...
0
votes
0answers
83 views
Accept popular ERC20 tokens and auto-convert them to ETH in a smart contract
As an intermediate in smart contract development, I'm now facing the challenge where I would like to unify payment on the Ethereum ecosystem in a way that holders of popular ERC20 tokens can pay my ...
5
votes
2answers
122 views
Is it worth to store Ether at the full precision in database?
Ether has precision of 10^18 which makes it impossible to use BIGINT type in database to store values in weis: DECIMAL type should be used instead.
Is it worth to store values in Gwei to stay with ...
0
votes
0answers
27 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?
0
votes
0answers
23 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 ...
0
votes
0answers
13 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 ...
0
votes
0answers
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/
2
votes
2answers
59 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
votes
0answers
25 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
votes
0answers
19 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 ...
0
votes
0answers
363 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
votes
1answer
22 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
votes
0answers
351 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 ...
3
votes
1answer
212 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
25 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
votes
0answers
26 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
votes
0answers
23 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 ...
1
vote
2answers
1k 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
55 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
135 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, ...
1
vote
1answer
119 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 ?
2
votes
1answer
236 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
votes
0answers
22 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
votes
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
167 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
25 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?
4
votes
1answer
610 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, ...
2
votes
2answers
1k 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 ...
1
vote
1answer
98 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 ...
1
vote
2answers
1k 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
63 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 ...
1
vote
3answers
164 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
202 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
154 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
79 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
67 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
87 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
vote
2answers
221 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
69 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 ...
