Adds a correct default token uri. (#1225)

* Adds a correct default token uri.
* Adds default token uri function pending DID.

ocean_lib/models/data_nft.py

@@ -2,7 +2,9 @@
 # Copyright 2022 Ocean Protocol Foundation
 # SPDX-License-Identifier: Apache-2.0
 #
+import json
 import warnings
+from base64 import b64encode
 from enum import IntEnum, IntFlag
 from typing import Optional
 
@@ -80,10 +82,22 @@ def __init__(
             additional_datatoken_deployer or ZERO_ADDRESS
         )
         self.additional_metadata_updater = additional_metadata_updater or ZERO_ADDRESS
-        self.uri = uri or "https://oceanprotocol.com/nft/"
+        self.uri = uri or self.get_default_token_uri()
         self.transferable = transferable or True
         self.owner = owner
 
+    def get_default_token_uri(self):
+        data = {
+            "name": self.name,
+            "symbol": self.symbol,
+            "background_color": "141414",
+            "image_data": "data:image/svg+xml,%3Csvg viewBox='0 0 99 99' fill='undefined' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='%23ff409277' d='M0,99L0,29C9,24 19,19 31,19C42,18 55,23 67,25C78,26 88,23 99,21L99,99Z'/%3E%3Cpath fill='%23ff4092bb' d='M0,99L0,43C9,45 18,47 30,48C41,48 54,46 66,45C77,43 88,43 99,43L99,99Z'%3E%3C/path%3E%3Cpath fill='%23ff4092ff' d='M0,99L0,78C10,75 20,72 31,71C41,69 53,69 65,70C76,70 87,72 99,74L99,99Z'%3E%3C/path%3E%3C/svg%3E",
+        }
+
+        return b"data:application/json;base64," + b64encode(
+            json.dumps(data, separators=(",", ":")).encode("utf-8")
+        )
+
     def deploy_contract(self, config_dict, tx_dict) -> DataNFT:
         from ocean_lib.models.data_nft_factory import (  # isort:skip
             DataNFTFactoryContract,

ocean_lib/models/test/test_data_nft.py

@@ -2,6 +2,9 @@
 # Copyright 2022 Ocean Protocol Foundation
 # SPDX-License-Identifier: Apache-2.0
 #
+import json
+from base64 import b64decode
+
 import pytest
 from web3 import Web3
 
@@ -32,7 +35,13 @@ def test_permissions(
     data_nft.addManager(consumer_wallet.address, {"from": publisher_wallet})
     assert data_nft.getPermissions(consumer_wallet.address)[DataNFTPermissions.MANAGER]
 
-    assert data_nft.tokenURI(1) == "https://oceanprotocol.com/nft/"
+    token_uri = data_nft.tokenURI(1).replace("data:application/json;base64,", "")
+    decoded_token_uri = json.loads(b64decode(token_uri))
+
+    assert decoded_token_uri["name"] == "NFT"
+    assert decoded_token_uri["symbol"] == "NFTSYMBOL"
+    assert decoded_token_uri["background_color"] == "141414"
+    assert decoded_token_uri["image_data"].startswith("data:image/svg+xm")
 
     # Tests failing clearing permissions
     with pytest.raises(Exception, match="not NFTOwner"):

ocean_lib/web3_internal/test/test_contract_base.py

@@ -34,7 +34,7 @@ def test_main(config):
         1,
         ZERO_ADDRESS,
         ZERO_ADDRESS,
-        "https://oceanprotocol.com/nft/",
+        "http://someurl",
         True,
         alice_wallet.address,
         {"from": alice_wallet},