Questions tagged [exchanges]
places to trade ether with other currencies or assets
230
questions
2
votes
0answers
8 views
How to query data from Uniswap using the JS SDK?
I'm having problems retrieving some data metrics using the Uniswap JS SDK.
When I try to query getInputAmount it returns this error:
(node:88) UnhandledPromiseRejectionWarning: TypeError: Cannot read ...
0
votes
1answer
19 views
Deploying ERC20 emblem
When Bitcoin and Ethereum initially launched they had emblematic figures such as a B and a prysm to represent the token on exchanges and wallets e.g. MetaMask. Does one have to use JavaScript to ...
0
votes
0answers
14 views
Programmatically fill up dapp with gas
I am new to crypto and I'm trying to add tokens to my dapp's address. Can I use the
crypto.com v2 api private-create-order endpoint to fill up my dapp?
0
votes
0answers
33 views
Are binance ERC20 token transactions not on the ethereum blockchain?
I'm using web3js get transaction info on a specific ETH address. When I make the getTransactions call, no info is presented. I then check etherscan and also see that my binance ETH wallet (for ...
0
votes
1answer
24 views
MetaMask RPC error? 'MetaMask - RPC Error: Internal JSON-RPC error.' [closed]
I'm developing a front-end for an application that I'm trying to test. However, MetaMask keeps giving me this error? I tried changing the gas limit like previously suggested and nothing. Any ideas?
...
0
votes
0answers
22 views
What are incoming transactions to Binance
The Binance addresses and most other centralised exchanges exhibit a clear transaction pattern: All of the incoming transactions are from arbitrary EOAs and transfer Ether with them.
Does anybody know ...
0
votes
0answers
13 views
Is there a decentralized exchange that handles buying Ether (and other cryptocurrencies) for fiat money as well as other cryptocurrency?
I was looking at dapps a few days back (maybe on https://www.dapp.com ?) and remember encountering a decentralized exchange that allowed users to buy Ether with fiat currency (I specifically remember ...
1
vote
1answer
420 views
Get Uniswap Exchange Rate of any Token with Web3
I need to get the exchange rate for every token on Uniswap with Web3 like Uniswap itself which they then display on their web interface on app.uniswap.org like this:
So when I enter to swap the ...
0
votes
1answer
21 views
Is uniswap supply and demand model opposite of other exchanges
Let's say we have an ETH/USD pair. Normally, I would expect that if more people are buying ETH than selling ETH, the price of the pair goes up. This is because there is more demand for ETH, but the ...
1
vote
1answer
39 views
Converting between USD and a custom ERC-20 token
Right now, the best way to convert USD to a custom ERC-20 token, like DEV is to first convert the USD to ETH and then convert the ETH to DEV with an exchange like Uniswap. Along the way, the ETH might ...
1
vote
1answer
53 views
How Do Liquidity Pool Economics Work?
I'm looking at liquidity pools (LPs), and the economics don't make sense given the APYs. How is this possible, or are exchanges simply taking a loss to establish market dominance? Please tell me if/...
0
votes
1answer
46 views
If crypto deposit and withdrawal limits are unknown, will excess ETH deposit be lost? [closed]
Binance, a centralized exchange, doesn't publish its daily crypto deposit and withdrawal limits for unverified accounts in its FAQ. If I deposit a large amount of ETH to my Binance account's Ether ...
0
votes
0answers
11 views
Are there any open source accounting systems
I am looking for some accounting system for my project. I am developing an app where people have their own accounts, just like on any centralized exchange. Users will be able to deposit some ERC20 ...
0
votes
0answers
55 views
Is Kraken hiding the real cost of deposit?
A part of my current strategy is to mine ETH, and to send a part of it from my wallet (MEW) to Kraken for: a) buying BTC b) withdrawing some sweet € to pay the bills.
When I'm using MEW to send ETH to ...
0
votes
1answer
24 views
Exchange wallets, hardware wallets and web wallets: Why don't they all have a seed recovery phrase?
Here's what I think is going on
Exchange wallets for ether have no seed recovery phrase. Only one's log-in and password to their account on the exchange grants access to their wallet.
Hardware ...
0
votes
0answers
54 views
Can an Ether wallet address be traceable to a crypto exchange?
If an ETH wallet address was created upon the opening of a Binance or Coinbase account, is there anything in the address itself, or its activity, that can give clues as to whether it was in fact ...
0
votes
1answer
94 views
Decentralized exchange that lets you cash out Ether for fiat money?
Uniswap is a decentralized exchange that doesn't require KYC or ID
for trading between ETH and ERC-20 tokens (altcoins), while
Bisq is a decentralized exchange that doesn't require KYC or ID for
...
0
votes
1answer
23 views
Are liquidity pools the decentralized exchange equivalent of storing assets on centralized exchanges?
We'd think that decentralized exchanges are just the same as centralized exchanges in terms of functional purposes which are
trading
storing crypto assets
However, the second item is not readily ...
1
vote
1answer
15 views
Sushi swap exchange rate question
I found the exchange on sushi swap or uni swap always changing, if I change 1000 usdt to USDC, the rate is better than changing 10000 usdt, usually if you change more, the rate should be better? Why ...
1
vote
0answers
101 views
What is the rationale behind lower minimum deposit & deposit fees for ECR20 Tokens vs Ethereum? [closed]
While examining the fee structure on Kraken I noticed the following peculiar pattern:
Ethereum:
Deposit Minimum: 0.05 ETH (approx. $61.99 at time of posting)
Deposit Fee: Variable on-chain fee to ...
0
votes
1answer
98 views
A cheap way to convert between USDT and USDC
Any decentralized cheaper way to convert usdt and USDC? I heard that usdt and usdt also freeze the assets? Any reliable usd service that can not freeze assets?
0
votes
0answers
15 views
Any decentralized exchanger to convert between btc and eth？
Any way to convert on different chains？That means we can convert between btc and eth on different chain.
1
vote
0answers
45 views
Recover Lost Funds from Botched ETH Deposit Without Access to Private Keys?
I'm using the wei approach (4 right-most zeros) as a marker to track user deposits on my site. In short, every user on the site is told to append a custom amount of "wei" to every deposit ...
1
vote
1answer
526 views
How does “swap” work between ERC20 tokens? And what is “swap”?
What is "swap" presicely between ERC20 tokens? Is it exchanging one ERC20 token for the other without fees, in the most possible native way?
How is it different from "convert"?
Let'...
0
votes
0answers
51 views
i need some help transfering funds back into my account from a smart contract i accidentally sent funds to
i was using uniswap and i thought i was easily transfering one token into another and somehow i put myself into a smart contract and cant get my funds back.... yesterday i had figured out with the ...
1
vote
1answer
2k 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
25 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
29 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
5 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
41 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
20 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
17 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
46 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
25 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
2answers
251 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
211 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 ...
6
votes
2answers
150 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
28 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
51 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
16 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
7 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
77 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
29 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
579 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
26 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
559 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
354 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
26 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
30 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 ...
