Which API can I use to buy the NFT on Rarible with a static price?

[eduardstal]

Question Posted: 17 August 2021, in Discord

Jay Rank#7831:

Hello there, can someone help me with which API I can buy the NFT on Rarible which is having a static price? I tried my hard to work around but I haven't found any luck CODE

import requests

url = "https://ethereum-api-staging.rarible.org/v0.1/order/orders/0xdfa3eed367ebf346a1469100df138cf8ec4d0b07b1ea7acd18ddd4752e9e6e28/prepareTx"
header = {'Content-type': 'application/json'}
body = {"maker": "0x440Baa14203a45896DAC3c28CDC3F192f3ea3520","amount": "1000000000000", "payouts": [],"originFees": []}

response = requests.request("POST", url=url, params=body)
print(response.status_code)
print(json.dumps(response.json(), indent=4))

ERROR:

415
{
    "timestamp": "2021-08-17T09:10:29.551+00:00",
    "path": "/v0.1/orders",
    "status": 415,
    "error": "Unsupported Media Type",
    "requestId": "047fda9e-475306"
}

Sergey Anufriev | Rarible.com#6435:

I think something wrong with your headers. Request works fine

Jay Rank#7831:

Thank you Sergey, also can you tell me what exactly amount is and how it's value is generated? Beacuase if you look closely I have never actually send the headers in POST request, hence the questions

Sergey Anufriev | Rarible.com#6435:

I mean, that there is no content-type header in your final request.

curl -H "Content-Type: application/json" -X POST --data '{"maker":"0x440Baa14203a45896DAC3c28CDC3F192f3ea3520","amount":"1000000000000","payouts":[],"originFees":[]}' https://ethereum-api-staging.rarible.org/v0.1/order/orders/0xdfa3eed367ebf346a1469100df138cf8ec4d0b07b1ea7acd18ddd4752e9e6e28/prepareTx 

this curl work fine in my terminal too.

Or maybe I did not catch your question?

Jay Rank#7831:

Oops, I see now...instead of Params I actually had to do json=.....
Thanks for the help, Sergey...
I really appreciate it

Jay Rank#7831:

@Sergey Anufriev | Rarible.com once pass this step of bidding on an NFT having a fixed price which API should be used to finally buy that NFT, which I suppose according to docs be a matching order i.e. left order and right order with signature

Sergey Anufriev | Rarible.com#6435:

Usual and simple work flow

1. you create sell/bid order with signature using API
2. opposite user (who wants to buy or to sell respectively) call prepareOrderTransaction with order hash created in step 1 and some other params
3. With response data in step 2 - opposite user can call web3 client to make transaction

Jay Rank#7831:

When you say web3 client, do you mean something like metamask to sign?

soSteve#8813:

@jay Rank did it work for you? If so, could you share your code please?

Jay Rank#7831:

About creating a bid or a full buy of NFT??
Under 2nd case, I have a twisted lead

Because I tried to send then using createOrderPendingTransaction API to see if my NFT ownership is swapped by paying crypto worth of fixed price, but it didn't.

1. after step 2 from here i.e. prepareOrderTransaction with order hash created in step 1 and some other params 2. I used the hash to generate and prepare Txn

url = "https://ethereum-api-staging.rarible.org/v0.1/order/orders/0xc30e207d68ce157f6260dd07ee0fc92912cf30e2a007e38030e917d34c807f85/prepareTx"
header = {"Content-type": "application/json"}
body = {"maker": "0xe21aa579a784d7903833c9392679c44d20fd5582","amount": "6000000000000000", "payouts": [],"originFees": []}

response = requests.request("POST", url=url, json=body, headers=header)
print(response.status_code)
print(json.dumps(response.json(), indent=4))

3. finally in order to buy the NFT i tried this, by adding data from above step into input field:

url = "https://ethereum-api.rarible.org/v0.1/nft/transactions"
header = {"Content-type": "application/json"}
body = {
   "hash": "0xc30e207d68ce157f6260dd07ee0fc92912cf30e2a007e38030e917d34c807f85",
   "from": "0xe21aa579a784d7903833c9392679c44d20fd5582",
   "nonce": 13,
   "to": "0xd4a57a3bd3657d0d46b4c5bac12b3f156b9b886b",
   "input": "DATA I RECEIVE FROM STEP 2 ABOVE"
}

response = requests.request("POST", url=url, json=body, headers=header)
print(response.status_code)
print(json.dumps(response.json(), indent=4))

but i ended up gettng this as output , every damn time.

200
[]

Eugene Nacu | Rarible#9332:

You can't buy an NFT using API. to do this use ethereum wallet (metamask or other) Also, it's highly encouraged to use SDK for such operations. We tried to abstract blockchain and contract complexity there. So you can just invoke something like sell or buy and SDK will do the work (calling wallet to send transaction, sign messages etc)

Currently due to an error in configuration, https://ropsten.rarible.com/ and https://rinkeby.rarible.com/ point to the mainnet Pls, use https://rinkeby-staging.rarible.com/ and https://ropsten-staging.rarible.com/

[eduardstal]

Since we need to group and filter the discussions page, I'll be adding this reply as an answer since these kinds of threads(from discord) won't have activity any time soon.