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245 lines
6.0 KiB
Markdown
245 lines
6.0 KiB
Markdown
---
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description: 'Discover the World of NFTs: Retrieving a List of Fixed-rate exchanges'
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---
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# Get fixed-rate exchanges
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Having gained knowledge about fetching lists of data NFTs and datatokens and extracting specific information about each, let's now explore the process of retrieving the information of fixed-rate exchanges. A fixed-rate exchange refers to a mechanism where data assets can be traded at a predetermined rate or price. These exchanges offer stability and predictability in data transactions, enabling users to securely and reliably exchange data assets based on fixed rates. If you need a refresher on fixed-rate exchanges, visit the [asset pricing](../asset-pricing.md#fixed-pricing) page.
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_PS: In this example, the query is executed on the Ocean subgraph deployed on the mainnet. If you want to change the network, please refer to_ [_this table_](broken-reference)_._
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{% tabs %}
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{% tab title="Javascript" %}
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The javascript below can be used to run the query and fetch a list of fixed-rate exchanges. If you wish to change the network, replace the variable's value `network` as needed. 
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```runkit nodeVersion="18.x.x"
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var axios = require('axios');
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const query = `{
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fixedRateExchanges(skip:0, first:2, subgraphError:deny){
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id
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contract
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exchangeId
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owner{id}
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datatoken{
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id
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name
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symbol
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}
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price
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datatokenBalance
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active
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totalSwapValue
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swaps(skip:0, first:1){
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tx
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by {
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id
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}
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baseTokenAmount
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dataTokenAmount
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createdTimestamp
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}
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updates(skip:0, first:1){
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oldPrice
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newPrice
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newActive
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createdTimestamp
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tx
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}
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}
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}`
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const network = "mainnet"
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var config = {
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method: 'post',
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url: `https://v4.subgraph.${network}.oceanprotocol.com/subgraphs/name/oceanprotocol/ocean-subgraph`,
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headers: { "Content-Type": "application/json" },
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data: JSON.stringify({ "query": query })
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};
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axios(config)
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.then(function (response) {
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let result = JSON.stringify(response.data)
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console.log(result)
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})
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.catch(function (error) {
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console.log(error);
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});
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```
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{% endtab %}
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{% tab title="Python" %}
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The Python script below can be used to run the query and retrieve a list of fixed-rate exchanges. If you wish to change the network, then replace the value of the variable `base_url` as needed.
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**Create script**
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{% code title="list_fixed_rate_exchanges.py" %}
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```python
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import requests
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import json
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query = """
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{
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fixedRateExchanges(skip:0, first:2, subgraphError:deny){
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id
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contract
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exchangeId
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owner{id}
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datatoken{
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id
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name
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symbol
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}
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price
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datatokenBalance
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active
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totalSwapValue
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swaps(skip:0, first:1){
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tx
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by {
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id
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}
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baseTokenAmount
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dataTokenAmount
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createdTimestamp
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}
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updates(skip:0, first:1){
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oldPrice
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newPrice
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newActive
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createdTimestamp
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tx
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}
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}
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}"""
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base_url = "https://v4.subgraph.mainnet.oceanprotocol.com"
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route = "/subgraphs/name/oceanprotocol/ocean-subgraph"
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url = base_url + route
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headers = {"Content-Type": "application/json"}
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payload = json.dumps({"query": query})
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response = requests.request("POST", url, headers=headers, data=payload)
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result = json.loads(response.text)
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print(json.dumps(result, indent=4, sort_keys=True))
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```
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{% endcode %}
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**Execute script**
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```
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python list_fixed_rate_exchanges.py
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```
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{% endtab %}
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{% tab title="Query" %}
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Copy the query to fetch a list of fixed-rate exchanges in the Ocean Subgraph [GraphiQL interface](https://v4.subgraph.mainnet.oceanprotocol.com/subgraphs/name/oceanprotocol/ocean-subgraph/graphql). 
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```
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{
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fixedRateExchanges(skip:0, first:2, subgraphError:deny){
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id
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contract
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exchangeId
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owner{id}
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datatoken{
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id
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name
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symbol
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}
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price
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datatokenBalance
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active
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totalSwapValue
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swaps(skip:0, first:1){
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tx
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by {
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id
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}
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baseTokenAmount
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dataTokenAmount
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createdTimestamp
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}
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updates(skip:0, first:1){
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oldPrice
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newPrice
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newActive
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createdTimestamp
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tx
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}
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}
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}
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```
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{% endtab %}
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{% endtabs %}
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<details>
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<summary>Sample response</summary>
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```json
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{
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"data": {
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"fixedRateExchanges": [
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{
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"active": true,
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"contract": "0xfa48673a7c36a2a768f89ac1ee8c355d5c367b02",
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"datatoken": {
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"id": "0x9b39a17cc72c8be4813d890172eff746470994ac",
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"name": "Delightful Pelican Token",
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"symbol": "DELPEL-79"
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},
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"datatokenBalance": "0",
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"exchangeId": "0x06284c39b48afe5f01a04d56f1aae45dbb29793b190ee11e93a4a77215383d44",
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"id": "0xfa48673a7c36a2a768f89ac1ee8c355d5c367b02-0x06284c39b48afe5f01a04d56f1aae45dbb29793b190ee11e93a4a77215383d44",
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"owner": {
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"id": "0x03ef3f422d429bcbd4ee5f77da2917a699f237ed"
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},
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"price": "33",
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"swaps": [
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{
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"baseTokenAmount": "33.033",
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"by": {
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"id": "0x9b39a17cc72c8be4813d890172eff746470994ac"
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},
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"createdTimestamp": 1656563684,
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"dataTokenAmount": "1",
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"tx": "0x0b55482f69169c103563062e109f9d71afa01d18f201c425b24b1c74d3c282a3"
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}
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],
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"totalSwapValue": "0",
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"updates": []
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},
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{
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"active": true,
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"contract": "0xfa48673a7c36a2a768f89ac1ee8c355d5c367b02",
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"datatoken": {
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"id": "0x2cf074e36a802241f2f8ddb35f4a4557b8f1179b",
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"name": "Arcadian Eel Token",
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"symbol": "ARCEEL-17"
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},
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"datatokenBalance": "0",
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"exchangeId": "0x2719862ebc4ed253f09088c878e00ef8ee2a792e1c5c765fac35dc18d7ef4deb",
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"id": "0xfa48673a7c36a2a768f89ac1ee8c355d5c367b02-0x2719862ebc4ed253f09088c878e00ef8ee2a792e1c5c765fac35dc18d7ef4deb",
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"owner": {
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"id": "0x87b5606fba13529e1812319d25c6c2cd5c3f3cbc"
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},
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"price": "35",
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"swaps": [],
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"totalSwapValue": "0",
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"updates": []
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}
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]
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}
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}
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```
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</details>
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