Displayed results from multiple apis on a single API

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EDIT : it's ok now !!!

Hello to all, 

I would like to know how it is possible to centralize on a single api the data of several api 

I would like to have the result of the four res.data at the address /coingeckotest

Currently I can see in the terminal the result I want to have but on the page /coingeckotest I have a return of "null" value 

Thank you in advance for your answers

What I have tried:

<pre>async function datauniswap() {
let datauniswap = await axios
.get('https://api.coingecko.com/api/v3/exchanges/uniswap/tickers')
.then((res) => {
console.log(res.data)
})
return datauniswap
}
 
async function datasushiswap() {
let datasushiswap = await axios
.get('https://api.coingecko.com/api/v3/exchanges/sushiswap/tickers')
.then((res) => {
console.log(res.data)
})
return datasushiswap
}
 
async function datacurvefinance() {
let datacurvefinance = await axios
.get('https://api.coingecko.com/api/v3/exchanges/curve/tickers')
.then((res) => {
console.log(res.data)
})
return datacurvefinance
}
 
async function dataquickswap() {
let dataquickswap = await axios
.get('https://api.coingecko.com/api/v3/exchanges/quickswap/tickers')
.then((res) => {
console.log(res.data)
})
return dataquickswap
}
 
 
 
 
server.get('/coingeckotest', async (req, res) => {
exchangeone = await datauniswap();
exchangetwo = await datasushiswap();
exchangethree = await datacurvefinance();
exchangequattro = await dataquickswap();
cacheTime = Date.now();
res.json[datauniswap, datasushiswap, datauniswap, datacurvefinance]
})

Posted 17-Jul-22 6:17am

Member 15709071

Updated 21-Jul-22 7:34am

v2

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Richard Deeming · Answer 1 · 2022-07-18T21:45:00

Quote:

JavaScript

res.json[datauniswap, datasushiswap, datauniswap, datacurvefinance]

As far as I can see, res.json is a function. You need to call that function, passing in the data you want to return.

You also need to send the variables containing the data you've loaded, not the functions used to load the data.

For example:

JavaScript

res.json({ uniswap: exchangeone, sushiswap: exchangetwo, curvefinance: exchangethree, quickswap: exchangequattro });

Once you've fixed that, you'll probably want to fix your code to issue the external requests in parallel, rather than sequentially:

JavaScript

server.get('/coingeckotest', async (req, res) => {
    // Start the external calls in parallel:
    const promises = [
        datauniswap(),
        datasushiswap(),
        datacurvefinance(),
        dataquickswap()
    ];
    
    // Wait for them all to finish:
    const uniswap: await promises[0],
          sushiswap: await promises[1],
          curvefinance = await promises[2],
          quickswap = await promises[3];
    
    // Return the data:
    cacheTime = Date.now();
    res.json({ uniswap, sushiswap, curvefinance, quickswap });
});