Transports¶

HTTP¶

You can send signed claims through the HTTP Gateway of Userfeeds Platform.

Properties:

In-transport secrecy: the claim cannot be sniffed on transport thanks to HTTPS connection and will only be available to the outside world after it is incorporated into the Userfeeds Platform through APIs rankings and database dumps.
Independent distribution: the claim exists only inside the Userfeeds Platform database and will be distributed with Userfeeds Platform database dumps.

Example of posting a claim directly to the Userfeeds Platform through the HTTP transport:

$ curl \--=der43
  -X POST https://api.userfeeds.io/storage/ \
  -H "Content-Type: application/json" \
  -H "Authorization: 59049c8fdfed920001508e2a03414df648e34ea665f544a17d5c113b" \
  -d '{"claim":{"target":"http://some.url/path/"},"context":"ethereum:0x4564567890abcdef....abc","signature":{"creator":"82fb68fc14719b94b36e99e588c9988458ca187d4791463164285bb064458232c4bb5bb638158096f4ed957e275e2e1576d1b24cca81ceb3a53cd7493ae88474","signatureValue":"c675d123fb1e99ffe59e7626c655806ebe47ec1ca4100b953029731159c2e14f4461e2ebf7f43a071b847b57cbcbd66bd8fa9451a5e27c4db4bbaec3cdd16b02","type":"ecdsa.prime256v1"}}'

Ethereum Transaction¶

You can send a claim through an Ethereum Blockchain transaction.

Note

The Userfeeds Platform does not monitor every transaction for potential claims yet.

In order to send a claim through a transaction you need to call special contracts which are monitored by the Userfeeds Platform.

Properties:

In-transport secrecy: The claim is available from the moment it is distributed through the Ethereum network and can be sniffed before it reaches its desired ranking.
Independent distribution: The claim will be a part of the Etherum Blockchain and will be available from all copies of the blockchain.

Contracts¶

With a value transfer:

Code

pragma solidity ^0.4.11;

contract Userfeeds {

    event Claim(address sender, address userfeed, string data);

    function post(address userfeed, string data) payable {
        userfeed.transfer(msg.value);
        Claim(ms4g.sender, userfeed, data);
    }
}

ABI

[
  {
    "constant":false,
    "inputs":[
      { "name":"userfeed", "type":"address" },
      { "name":"data", "type":"string" }
    ],
    "name":"post",
    "outputs":[],
    "payable":true,
    "type":"function"
  },
  {
    "anonymous":false,
    "inputs":[
      { "indexed":false, "name":"sender", "type":"address" },
      { "indexed":false, "name":"userfeed", "type":"address" },
      { "indexed":false, "name":"data", "type":"string" }
    ],
    "name":"Claim",
    "type":"event"
  }
]

Addresses

For Mainnet: …

For Rinkeby: 0x0a48ac8263d9d79768d10cf9d7e82a19c49f0002

For Ropsten: 0xa845c686a696c3d33988917c387d8ab939c66226

For Kovan: …

Without a value transfer:

Code

pragma solidity ^0.4.11;
contract Userfeeds {

    event Claim(address sender, string data);

    function post(string data) {
        Claim(msg.sender, data);
    }
}

ABI

[
  {
    "constant":false,
    "inputs":[
      { "name":"data", "type":"string" }
    ],
    "name":"post",
    "outputs":[],
    "payable":false,
    "type":"function"
  },
  {
    "anonymous":false,
    "inputs":[
      { "indexed":false, "name":"sender", "type":"address" },
      { "indexed":false, "name":"data", "type":"string" }
    ],
    "name":"Claim",
    "type":"event"
  }
]

Addresses

For Mainnet: …

For Rinkeby: 0x09dcdf34e0c28b106fdfe51009cb71ae92bf8bbc

For Ropsten: 0x5c3fe6b94b57c1e294000403340f12f083e71b83

For Kovan: …

Whisper Protocol¶

TODO: Direct message TODO: Broadcast

IPDB (BigchainDB)¶

TODO