anchor.diff:  currency exchange within stellar.  It provides data regarding open offers to
   exchange currency (often called an order book) and also provides data about
   trades that were executed within the exchange.
  -
   
   ## API Overview
   
  
positive.code:               },
                "id": "gcEuhxySh58bKtCY3UPaWQDR7a1BzGB3ePdxc4UrinkBJyxESe",
                "paging_token": "1163936141312",
              "address": "gcEuhxySh58bKtCY3UPaWQDR7a1BzGB3ePdxc4UrinkBJyxESe",
                "sequence": 1163936137285,
              "balances": [
                  {
                  "currency_type": "native",
                    "balance": 99939999999310
                  }
                ]
              }
  
  ## Transaction [/transactions/{hash}]
  
  
negative.code:   + result_xdr (string, required)       - The base64-encoded XDR representation of the TransactionResultPair returned during application
    + result_meta_xdr (string, required)  - The base64-encoded XDR representation of the TransactionMeta created during transaction application
  
  ### Transaction details [GET /transactions/{hash}]
    + Parameters
      + hash: 0ab231385734ad4092cc0651f3acd2a6e3eead24282f2725a79d019d4b791d54 (required, string) - The hex-encoded hash of a transaction
    + Response 200
      + Attributes (Transaction)
      + Body
  
              {
                "_links": {
                  "account": {
                    "href": "/accounts/gcEuhxySh58bKtCY3UPaWQDR7a1BzGB3ePdxc4UrinkBJyxESe"
                  },
                  "effects": {
                    "href": "/transactions/5488180daa06cb2ac7b4934a7e421d9e78c47cb620a78c35987f14d3047da8c4/effects/{?cursor}{?limit}{?order}",
                    "templated": true
                  },
                  "ledger": {
                    "href": "/ledgers/276"
                  },
                  "operations": {
                    "href": "/transactions/5488180daa06cb2ac7b4934a7e421d9e78c47cb620a78c35987f14d3047da8c4/operations/{?cursor}{?limit}{?order}",
                    "templated": true
                  },
                  "precedes": {
                    "href": "/transactions?cursor=1185410977792\u0026order=asc"
                  },
                  "self": {
                    "href": "/transactions/5488180daa06cb2ac7b4934a7e421d9e78c47cb620a78c35987f14d3047da8c4"
                  },
                  "succeeds": {
                    "href": "/transactions?cursor=1185410977792\u0026order=desc"
                  }
                },
                "id": "5488180daa06cb2ac7b4934a7e421d9e78c47cb620a78c35987f14d3047da8c4",
                "paging_token": "1185410977792",
                "hash": "5488180daa06cb2ac7b4934a7e421d9e78c47cb620a78c35987f14d3047da8c4",
                "ledger": 276,
                "account": "gcEuhxySh58bKtCY3UPaWQDR7a1BzGB3ePdxc4UrinkBJyxESe",
                "account_sequence": 1163936137217,
                "max_fee": 10,
                "fee_paid": 10,
                "operation_count": 1,
                "result_code": 0,
                "result_code_s": "tx_success",
                "envelope_xdr": "TODO",
                "result_xdr": "TODO",
                "result_meta_xdr": "TODO"
              }
  
  ### All Transactions [GET /transactions{?order}{?limit}{?cursor}]
  
    + Parameters
      + cursor (optional, string, `373a31`) ... A paging token
      + limit (optional, number, `10`) ... The maximum number of transactions to return in the response
      + order (string)
  
  