ProtoBuffer.md

{
    "pairs":[
        {
            "asset_a":{
                "name":"A"
            },
            "asset_b":{
                "name":"B"
            },
            "a2b_fee":"0.1"
        },
        {
            "asset_a":{	
                "name":"A"
            },
            "asset_c":{	
                "name":"C"
            },
            "a2c_fee":"0.01"
        }
    ]
}

message Asset {
    string name = 1;
    string amount = 2;
}

message Pair {
    Asset asset_a = 1 [json_name = "asset_a"];
    Asset asset_b = 2 [json_name = "asset_b"];
    string a2b_fee = 3 [json_name = "a2b_fee"];
    string a2b_min = 4 [json_name = "a2b_min"];
}