Questions tagged [exchanges]

places to trade ether with other currencies or assets

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Do binance trades happen on the blockchain?

When I trade (ethereum based) tokens on binance, do the tokens actually trade on the blockchain, or does binance just change the ownership in an internal database and only invokes the blockchain when ...
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How to set price to NFT token and update that price?

I want to create a market place of nfts. I know how to mint and creat nft but I dont know how to set price of token, how to set list of orders. I read that the price should be set on token contract ...
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Tell apart an exchanges hot and cold wallet?

Bit of a weird question but how do you know which address is an exchanges hot wallet vs. cold storage wallet? I have a list of eth transfers here that go from one exchange wallet to another (e.g. ...
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How to auto-buy from arweave blockchain on payable called?

So I have a wallet in Eth E and arweave A and a smart contract that knows both wallet addresses. I am developing is minting NFTs. When a new NFTis minted its contents are stored on arweave chain. How ...
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How to create wallets/exchanges profile using API?

Please share information. What crypto wallets/exchanges are available with an online API available with which to create a profile? In the sense in the API itself, enter an email and get a profile with ...
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What are DEX and CEX used for?

DEX: Decentralized EXchanges CEX: Centralized EXchanges My questions are: what are DEX and CEX used for? how does them work?
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Are wallet addresses in the crypto exchange website actual ethereum accounts?

a newbie here, I am trying to understand how ethereum based CEX's work. Users create accounts/wallet addresses (not email-linked user accounts) on the exchange. Are those addresses actual ethereum ...
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Did I get it right about how centralized ethereum crypto exchanges work?

a newbie here, I have a question about how centralized ethereum-based crypto exchanges facilitate external transactions. Please, tell me if I understood the process right, and if not, could you please ...
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2 answers
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Does a crypto exchange website need to run its ethereum node?

I am learning about ethereum-based crypto exchanges, and I tend to 'scratch my head' often. Does a crypto exchange website need to run its ethereum node? (Is it necessary for the ethereum server to ...
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Is there any Uniswap quote function for on-chain calls?

I want to expect how much input tokens should be spent to get exact amount of output token on Uniswap V3. Uniswap V2 has router.getAmountsIn() to expect it. V3 supports quote interface but it is ...
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How to exchange DAI to ETH without paying fee in ETH?

I was trying to exchange my DAI stablecoins to other token, but for that I needed ETH to pay commission. All my assets are in stablecoins and I can not even exchange them to ETH on Uniswap or 1Inch ...
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ERC20 "transferFrom" not transferring balance/token to contract address

I am trying to make a DEX and facing an issue in swapping. I created two contracts. One is Token (of ERC20 type) and other is Exchange. Here is my Token contract. contract Token is ERC20 { address ...
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Can i create multiple web3 filter ? At least 10000 filter for checking deposit to adderess

We have more than 10000 ethereum wallet addresses and I want to keep track of crypto deposit to the wallet addresses. What should I do ? Should I create 10000 web3 filter for checking deposit to that ...
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How to track the crypto payment made to specified address on ethereum?

I have created different ethereum wallet address for each user registred on exchange . Now the problem is user can deposit crypto at any time and we have to reflect the balance in user account and ...
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What is the architecture for a NFT exchange?

I'm making an NFT marketplace and I want to add certain features that cannot be implemented on-chain. Favourite certain NFTs let users create usernames and add profile pictures show a list of ...
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How the centralized exchanges handle deposits?

'Greetings! I am wondering if anyone is aware of the structure that is used by centralized exchanges like Binance, Coinbase, KuCoin, etc. to handle their ETH/ERC20 Tokens deposits. I started to ...
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How to indirectly convert Monero to Ethereum in MetaMask?

Obviously MetaMask only deals in ERC-20 tokens, which means MetaMask doesn't recognize Monero, but indirectly, how can one send/swap/convert Monero funds to an Ethereum hot wallet? The idea is to load ...
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Tron api request limit

in order to get information from tron we need it's api but the question is how many request can you have with a Tron API for a crypto exchange? what about BNB API? how many in BNB request limits?
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How are Uniswap fees distributed equally factoring in both proportion and duration pooled?

A similar question has already been asked, however a satisfactory answer has not yet been provided. The Uniswap V2 Pools docs states: If the provider is minting a new pool, the number of liquidity ...
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Token Price on Swap and CEX/DEX

My question is actually almost similar with this one : How to keep the token price in uniswap the same with the centralized exchange I want to know how to sync token price more deeply : From the link ...
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how do exchanges move their users assets?

do big exchanges move their users assets from HD wallets different dresses to a main wallet address ? to eventually move it to cold wallet ? if the answer is YES how do they do it? that's a lot of on ...
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exchange gather all hd wallet adresses fund

every exchange has a HD wallet that stores the fund an assets of their clients but sometimes in order to keep peoples coins safe the exchanges have to move their assets to more secure wallet like ...
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Can anyone explain how crypto exchange deposit works?

I've been trying to understand how different exchanges manage their deposit address pool. When you deposit funds to address given by any exchange(FTX, Binance, etc) they immediately transfer that ...
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The right way to allow 2 users to exchange erc1155 tokens under the same smart contract

For example, A has coins, B has swords. A & B agree on the exchange of 50 coins <-> 2 swords. What is the right way for them to exchange in a decentralized game? ERC1155 TransferSingle/...
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5 votes
3 answers
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Is it secure to read USD / ETH rate from exchanges directly without using price oracles?

Is it possible to read USD/ETH rate directly from some known smart contract without an oracle? I have a working solution via an oracle. However, my client says it should be possible to read the ...
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1 vote
1 answer
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Is it possible to purchase Ethereum with USD command line?

I opened a wallet using go-ethereum with this command geth new account Am I able to saturate this account by purchasing Ethereum with USD via the command-line? Are you usually charged a fee or can ...
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Using Fireblocks or BitGo to set up an exchange

I am wondering if anyone out there has experience working with fireblocks or BitGo? I am currently looking at building a customer and admin solution for a custom-erc20 token This would include things ...
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How to deposit crypto to a wallet without transferring in from an exchange?

As soon as you transfer crypto from your wallet on a crypto exchange to a MetaMask hot wallet address, your identity is traceable back to that exchange. How are people able to load a wallet without ...
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How to add my ERC20 Token to exchanges so others can trade? Best ways for 2021 and Beyond

(To start, I acknowledge there are some q&a's on this topic already, but I found they are roughly 3+ years old.) I have an ERC20 token launching alongside a dapp and I'd like to be able to have it ...
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Web3 - How can i get 1inch exchange and price list into my web3 app?

anyone knows how can i get this list of exchanges with their prices as shown in the picture in my web3.py app? (js also is fine). I couldnt find any 1inch contract that has a function that does this. ...
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Ethereum full node

is it possible if we have Ethereum full node in our crypto exchange ,how can we add new erc token in our website? we need to develop new full node for each token ? or we can use the Ethereum full ...
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Create smart contract in Solidity that buys tokens for user

I was wondering how to implement a smart contract (in Solidity) where a user inputs some ETH and then the smart contract buys multiple tokens from an exchange? For example, the users inputs 1 ETH and ...
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Does a bridge always necessitates creating an intermediate token?

When one creating a so-called bridge in order to exchange a coin on one blockchain to a coin on a different blockchain, how does it work? Does it always necessitate creating an intermediate token - LT ...
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Does a bridge always necessitates creating an intermediate token? [duplicate]

When one creating a so-called bridge in order to exchange a coin on one blockchain to a coin on a different blockchain, how does it work? Does it always necessitate creating an intermediate token - LT ...
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Can I reset the initial set price for erc20 token on uniswap?

I am relatively new to cryptocurrency and wanted to try listing an erc20 token. I listed my erc20 token on Uniswap and set its initial price while adding the first liquidity. Later, I wanted to change ...
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Erc-20 token help

I am new to erc20 tokens, so I was wondering if I could have some help. I'm considering starting an erc20 token and I have one main question. When someone buys my erc20 token, does the Ethereum they ...
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1 vote
1 answer
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Can someone help me understand what this address is? has a lot of weird transactions. I am trying to track a scammer

How can I find out a specific address that belongs to which exchange? I am trying to track a scammer. my tokens were stolen and transferred to this address: 0xf629cbd94d3791c9250152bd8dfbdf380e2a3b9c ...
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How can exchanges afford to offer free deposits for ETH and ERC-20 tokens?

The question has been asked previously but the accepted answer does not hold a candle to reality: In both cases, the exchange pays the gas fee to send the tokens to the hot wallet. That's why the ...
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From where trading fee is deducted?

I don't know whether it is the perfect place to ask questions or not, But my question is in DEX or CEX, from where the trading fee is deducted ? from the base or the quote currency ? if trading fee is ...
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How do I build an exchange on top of ERC721?

I want to build an exchange that allows users to list existing ERC721 tokens. The problem is that I have looked at Wyvern and don't really understand it. I've seen smaller protocols (such as zora) but ...
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Uniswap price oracle

How can I access the Uniswap exchange rate for a specific pool? For example purposes lets assume I'm trying to find ETH to AAVE.
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The transaction cannot succeed due to error: execution reverted: PancakeRouter: INSUFFICIENT_OUTPUT_AMOUNT

Why i cant exchange my fckn tokens on pancakeSwap?
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Converting Ether to Monero vs using a tumbler

There are two ways to obfuscate source of funds, in this case Ether: Use a cryptocurrency tumbler, that mixes a source walet's contents into multiple parts that can be sent to a final exchange for ...
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1 vote
2 answers
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Who pays gas fee for ERC-20 token transactions in exchanger?

i am developing an exchanger as a hobby project in next js. I am just starting to learn about blockchain. I am generating new deposit ethereum addresses for every user. Now my main confusion is, when ...
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Failing to fill 0x quote

I'm trying to fill a quote that I get from the 0x API: const qs = createQueryString({ sellToken: 'TUSD', buyToken: 'WETH', sellAmount: BigInt(882693 * 10 ** 18) }); ..but the transaction ...
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How do obtain wrapped btc and wrapped ada in a local test network or a live test network like ropsten?

In the local test network and ropsten test network, it's easy to obtain ethereum but I need other tokens in order to do testing. I'm not sure how to obtain those tokens for testing.
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Although one or more Error Occurred[execution reverted] [duplicate]

actualy i use justliquidity to place order token change to bnb in price 0.0002 but i cant cancel my order and trustwallet connect justliquidity and i cant how solve probleme and when click cancel ...
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How to query DyDx liquidations from ethereum blockchain?

As far as I understand, all the exchanges like DyDx, Uniswap, Sushiswap etc. are actually contracts deployed on blockchain. So their data should be accessible to anyone having the chain downloaded. (...
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Which payment API I can use to transfer Fiat money to my crypto exchange users ? ( At the time of withdrawl )

I am creating a Crypto exchange using Binance API/SDK , Users will register and deposit Fiat funds first into platform's paypal/stripe account using payment gateway. After deposit they can see virtual ...
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Automatically generate an address for a token in the ERC20 and TRC20 network [duplicate]

How to create USDT TRC20 and ERC20 addresses for my wallet automatically via an api. I need to create USDT TRC20 and ERC20 addresses for a small exchange so that users can deposit their tokens, an ...
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