Questions tagged [0x]
The 0x tag has no usage guidance.
287
questions
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0x API showing a different price than what is shown on matcha.xyz
When I run the below it shows a price that is different from what I see on matcha. Trying to figure out how the price on matcha is derived.
https://api.0x.org/swap/v1/quote?buyToken=ETH&sellToken=...
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1
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54
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Where is 0x protocol v3 document
I'm finding Reference document for 0x v3.
However i can find only for 0x v4 in here(https://protocol.0x.org/en/latest/)
where can i find the document for v3?
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1
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77
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will 0x exchange proxy every refund eth?
I'm currently designing my contract to work with 0x Swap API, but not sure if I should handle the case of refund. (it's kind of tricky for me to add a fallback because i'm using the diamond proxy ...
- 583
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178
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Execution of limit orders
Hey I'm thinking of creating a trading platform and wanted to utilize 0x API orderbook in order to provide limit order + depending on the possibilities automatic profit taking and stop loss ...
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17
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Was 0xProject goleveldb/qunit discontinued?
I have some projects where the wasm is built on top of the 0xProject goleveldb fork.
Recently one of it's dependencies 'qunit' stopped being found by pkg.go and github. Has it been discontinued?
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1
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150
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how can I build a orderbook API in our database
I read 0x project, but have some confused. I want to build a orderbooks in our database, but know seem like we just call the 0x orderbook API? that is mean the order data in your service right? I just ...
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100
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Why is the price of my token wrong on Ox Protocol than everywhere else?
maybe you can help me. If this is not the correct avenue for customer service please direct me to the correct place.
I made a conversion within Coinbase Wallet and there is an error. Their customer ...
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1
answer
57
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Bundle 0x Swaps
Is it possible to bundle swaps received by multiple /swap/v1/quote API requests?
Is there a deployed smart contract that provides the functionality to bundle multiple swaps and maybe even take care of ...
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1
answer
90
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Track NFT transactions on 0x by fee recipient
Is it possible to find NFT sale transactions going through 0x v4 that have fees going to a certain specific address?
When I look at transaction data for the 0x v4 contract on etherscan, it just shows ...
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1
vote
2
answers
576
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Invalid transaction key: price - Swap Transaction fails using ethers.js on Ropsten
I am trying sell ETH and buy DAI. Trying to test it on Ropsten but the transaction fails saying - invalid transaction key - price.
Here is the my code
let wallet = new ethers.Wallet(wallet_privateKey);...
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1
vote
2
answers
157
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Sent to contract address
Hi I made a mistake by sending my WETH to the WETH contract address is there a way to recover my funds? I'll send proof of the transaction.
...
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1
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46
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Tiny amount of USDT returns during swap
This transaction is swapped USDT -> USDC. Also in this tx, I see a transfer of 0.000002 USDT to the user's address. The question is what this transfer means and why it happens?
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55
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0xAPI is failing to return best price for a token pair versus Sushiswap
We are using the 0xAPI to search price quotes on different exchanges for one of our native index tokens at Piedao (PLAY - 0x33e18a092a93ff21aD04746c7Da12e35D34DC7C4) vs. ETH.
The current quote for 1 ...
- 11
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1
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83
views
Fetching price feed for new tokens through api
i come across a scenario that a we will be enabling people to mint their ERC20 and on one page we will show them the total price in USD for their ERC20. a few question in my mind,
if uniswap is the ...
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1
answer
37
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Mixed Property-Based Order 0x V3
I’ve managed to deploy my own broker and validator contract on Rinkeby, and the orders execute fine and only allow the target properties to be filled. However, I’ve been trying to mix a brokered asset ...
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1
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49
views
0x API not using slippage for orders that only provide a buyAmount
Does the 0x API correctly determine a sellAmount when given a buyAmount and a specific slippage?
In the documentation is says the following about the slippage parameter
(Optional) The maximum ...
- 111
1
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2
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41
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0x API Help: Is this bandwith consumption normal for 0x api?
thanks for stopping by my question.
I'm implementing a bot that uses the /quote endpoint of 0x API to check some trading prices. The 0x application is dockerized, together with postgreSQL and redis, ...
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46
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Setup smart contract to enable bid negotiate without cancelling current listing order
anyone know if there is a way to setup a smart contract to enable negotiating an NFT bid without cancelling and creating a new listing each time?
Example:
I set an NFT for sale for 0.8 ETH, someone ...
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2
answers
82
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0x Protocol - Can I use for selling an NFT and get back an ERC-20 token example BUSD on BSC?
I'm using 0x Protocol for my project. And I want to use BUSD as asset that taker must pay to maker.
In 0x's document describes we can use native token BNB or WBNB, but not clear about if we can use ...
- 101
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118
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How to deploy ERC721OrdersFeature (0x v4) for trade ERC20 - ERC721 on testnet
I want to integrate with 0x-protocol v4 for trading ERC20 Token <-> ERC721 Token, I think ERC721OrdersFeature can help, how to deploy ERC721OrdersFeature smartcontract to BSC testnet?
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118
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0x Api Call to get prices in DAI
I am an absulute beginner, I'm sure some of you can help me here.
When I send an API call in Python as follows:
baseurl = "https://polygon.api.0x.org/swap/v1/prices?sellToken=WETH"
r = ...
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88
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0x API - "PancakeSwapFeature/UnderBought"?
{"code":105,"reason":"Error","values":{"message":"PancakeSwapFeature/UnderBought"}}
I was trying to swap ETH to BUSD via direct swap on BSC ...
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275
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How to do swap using encoded function call
I will try to describe my problem as clearly as possible so that I can get feedback on whether I am going in the right direction for resolution.
I'm running tests on mainnet fork trying to implement a ...
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1
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198
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0x Protocol ERC721Order - Trying to execute any transaction to fill or check status of signed order fails
I'm trying to interact with a signed order created using the ERC721Order from @0x/protocol-utils. Order created and signed using the following docs: https://docs.0x.org/nft-support/guides/signing-...
- 103
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1
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56
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0x: Query Liquidity Pools for APR
Is there a way to use 0x to query LPs to find out their current APR? I'm trying to build a small reporting tool and would love to query LPs on these DEXes, but can't seem to figure out how. I tried ...
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129
views
Asking for a quote for non-ETH tokens leads to gas limit error
I'm learning how to work with 0x quotes and I still couldn't make a successful request.
Here is what I'm trying to send
https://api.0x.org/swap/v1/quote?buyToken=DAI&sellToken=WETH&sellAmount=...
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1
answer
166
views
Correct usage of expiry for NFT Swap SDK v4
Creating a NFT trade order where the maker is selling a single 721 NFT, and the taker (same address as maker) is offering to buy it for eth. No matter what I set the expiry value to, the transactions ...
- 25
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114
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0x Price/Quote API doesn't handle different token decimals correctly
I am using the 0x Price and Quote API for my project and encountered the following Problem which could be a bug in the API.
Example request: https://api.0x.org/swap/v1/quote?sellToken=...
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184
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Support for EIP1271 smart contract signatures for 0x nft swaps?
Does 0x's nft swapping protocol plan on supporting eip 1271 smart contract signatures for the new nft swap protocol? We want to use gnosis safe (multisig) and other smart contract wallet (argent) to ...
- 27
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2
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135
views
LimitOrders 0x v4 Server Error 500
I'm trying to get limit orders working using the 0x reference:
https://docs.0x.org/market-makers/guides/0x-v4-rfq-orders-code-examples
looking to swap some WETH for some ZRX via placing a limit order.
...
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0
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1
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53
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0x-API OrderbookService tests fail
I managed to start the 0x-api locally (thanks to this and this), however, I am having trouble to run yarn test. I am particularly interested in the OrderbookService tests (e.g., how to post an order).
...
- 141
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124
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Fetching token prices using Swap/v1/quote API responds wrong price on avalanche chain?
Using the following query and conversion for bsc and eth respectively works:
https://bsc.api.0x.org/swap/v1/quote?buyToken=${contractAddress}&sellToken=WBNB&sellAmount=10000000000000000000
...
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0
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0
answers
149
views
0x / web3.js - Overflow when swapping direct
I'm getting quote from 0x on fantomchain w/o takeraddress. I then submit direct swap transaction by 2x'ing gas price and 3x'ing gas.. and i'm getting this strange error:
const sellToken = "DAI&...
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2
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156
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0x-API: parsing bytecode
I'm using the 0x API on my smart contract.
Is there any available API/tool to parse the bytecode from the 0x API ?
That would enhance my productivity.
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49
views
DodoEX pools not available via 0x API
We have created two one-sided Dodo V2 pools (ethereum/polygon) as part of initial treasury supply and kickoff and they are not showing up in 0x API for swapping.
There should be sufficient buyToken ...
1
vote
1
answer
153
views
0x Bad request error
since a few days, I am receiving a Bad Request error (status code 400) when trying to sign and submit an order:
ERROR(status code 400): {
"code": 100,
"reason": "...
- 141
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61
views
Getting transaction reverted on ropsten
Im trying to exchange ETH to DAI, but Im getting an error :
https://ropsten.etherscan.io/tx/0x19d2c3e8cd6bb1d4fa2da99f0a47de1c616b4d091f37d15f0a705ac784edb65e
What am I doing wrong ? I tried to ...
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1
answer
120
views
How to get each exchange swap price using 0x api
I am able to call the 0x /swap/v1/quote? endpoint without any issue (I know that is not hard). But passing in multiple exchanges, I thought, would return the swap prices on those exchanges. But it ...
- 101
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34
views
Fees are incorrect in 0x Instant project
Im trying to get 0x API fees but I dont understand how matcha.xyz does it. I tried looking at 0x Instant, but the fees are too low and same for me when I use their API
this is what Im getting (136000 ...
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2
answers
117
views
0x API - direct swap failing on Ropsten
Direct swap using JS template from the starter guide seems to be failing
const sellToken = "DAI";
const buyToken = "USDC";
/*
checking allowance
Ropsten DAI address = ...
- 101
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27
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Are there token behaviours that are not supported by the 0x protocol? [closed]
Sometimes swapping using 0x fail, are there certain types of tokens that are not supported? I am thinking in particular of tokens that take fees on each transfer/swap. For example the Safemoon token.
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130
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ERC721Order Orderbook in 0x API
I'm trying to post a signed ERC721Order to the 0X Api orderbook deployed on Ropsten using the 0x protocol utils libraries (endpoint: https://ropsten.api.0x.org/orderbook/v1/order).
Unfortunately I ...
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2
answers
101
views
verifying a signed nft swap order
I am using swap sdk to verify nft swap order in polygon chain.
const pKey = new ethers.Wallet.createRandom();
const signer = new ethers.Wallet(pKey, provider);
const nftSwapSdk = new NftSwapV3(...
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1
answer
150
views
How to extend the 0x v4 NFT protocol
Hello guys I am having a really hard time figuring out how to extend the protocol to add my validations prior to execute a filling order. I am on 0x v4 NFT, I figured out from the docs that adding the ...
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2
answers
69
views
Getting this error when calling nftswapv4.fillSignedOrder
Cannot use 'in' operator to search for 'erc1155Token' in undefined.
maybe the order isn't posting?
Here's the code I'm using to post it:
await nftSdk.postOrder(signedOrder, chainId);
If anyone has run ...
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25
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Adding 0x api to a wallet andriod, apple OS, chrome and desktop wallet
I have a few questions I hope somebody could clarify for me.
Is it possible to add the 0x API to a digital crypto wallet? if so what is the requirement for the underlying system?
Does it cost ...
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answer
99
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0x-api backend running without swap service
I have to use the '/swap/v1/quote' on Rinkeby testnet but currently, the 0x-API are not supported by default for Rinkeby as mentioned in the documentation. so I was trying to run the backend locally ...
- 315
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48
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0x Overbuying buyToken when setting slippagePercentage > 0
Based on the documentation here: https://0x.org/docs/api#request-1, I expected the 0xApi to obtain the exact amount of buyToken specified in the request, while applying the "slippageTolerance&...
- 439
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159
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0x API - FillQuote works on USDC=> DAI, but not DAI=>USDC
I'm trying to swap USDC to/from DAI. USDC to DAI swap works fine, but the revers ALWAYS fails
The smart contract im using is EXACTLY simpletokenswap.sol, the only modification I made was that uint(-1) ...
- 101
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262
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0x api - swapping ERC20 with ETH/WETH fails on Ropsten
Currently using IDENTICAL example from 0x starter guide.
Steps taken
deployed contract onto ropsten network
Deposited test eth to the smart contract. Then tried swapping to some ERC20's successfully:...
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