Using an NFD to sending to non-Algorand chains.

Fetching an NFD via the GET api will return any user-defined addresses for other chains the owner may have set.

They will each be returned as an array of addresses in the top-level property "unverifiedCa" ie:

    "unverifiedCa": {
        "btc": ["xxxxxxxxxxxxxxxx"],
        "eth": ["xxxxxxxxxxxxxxxx"],

All of these values are retrieved from the corresponding{token} property. If the full view of the NFD is used, then these properties would be within the properties -> userDefined key. ie:

    "appID": 763844423,
    "asaID": 763844429,
    "category": "common",
    "currentAsOfBlock": 21686682,
    "metaTags": [
    "name": "nfdomains.algo",
    "properties": {
        "userDefined": {
            "ca.btc": "xxxxxx"

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