{
  "format": 1,
  "function": "validate_settlement",
  "cases": [
    {
      "name": "valid: one allocation",
      "input": {
        "amount_ore": 50000,
        "from_user_id": "b",
        "to_user_id": "a",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 50000
          }
        ]
      },
      "expected": {
        "ok": null
      }
    },
    {
      "name": "valid: three allocations summing to the amount",
      "input": {
        "amount_ore": 60000,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 30000
          },
          {
            "account_id": "y",
            "amount_ore": 20000
          },
          {
            "account_id": "z",
            "amount_ore": 10000
          }
        ]
      },
      "expected": {
        "ok": null
      }
    },
    {
      "name": "valid: 50 allocations (the maximum)",
      "input": {
        "amount_ore": 5000,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "acc01",
            "amount_ore": 100
          },
          {
            "account_id": "acc02",
            "amount_ore": 100
          },
          {
            "account_id": "acc03",
            "amount_ore": 100
          },
          {
            "account_id": "acc04",
            "amount_ore": 100
          },
          {
            "account_id": "acc05",
            "amount_ore": 100
          },
          {
            "account_id": "acc06",
            "amount_ore": 100
          },
          {
            "account_id": "acc07",
            "amount_ore": 100
          },
          {
            "account_id": "acc08",
            "amount_ore": 100
          },
          {
            "account_id": "acc09",
            "amount_ore": 100
          },
          {
            "account_id": "acc10",
            "amount_ore": 100
          },
          {
            "account_id": "acc11",
            "amount_ore": 100
          },
          {
            "account_id": "acc12",
            "amount_ore": 100
          },
          {
            "account_id": "acc13",
            "amount_ore": 100
          },
          {
            "account_id": "acc14",
            "amount_ore": 100
          },
          {
            "account_id": "acc15",
            "amount_ore": 100
          },
          {
            "account_id": "acc16",
            "amount_ore": 100
          },
          {
            "account_id": "acc17",
            "amount_ore": 100
          },
          {
            "account_id": "acc18",
            "amount_ore": 100
          },
          {
            "account_id": "acc19",
            "amount_ore": 100
          },
          {
            "account_id": "acc20",
            "amount_ore": 100
          },
          {
            "account_id": "acc21",
            "amount_ore": 100
          },
          {
            "account_id": "acc22",
            "amount_ore": 100
          },
          {
            "account_id": "acc23",
            "amount_ore": 100
          },
          {
            "account_id": "acc24",
            "amount_ore": 100
          },
          {
            "account_id": "acc25",
            "amount_ore": 100
          },
          {
            "account_id": "acc26",
            "amount_ore": 100
          },
          {
            "account_id": "acc27",
            "amount_ore": 100
          },
          {
            "account_id": "acc28",
            "amount_ore": 100
          },
          {
            "account_id": "acc29",
            "amount_ore": 100
          },
          {
            "account_id": "acc30",
            "amount_ore": 100
          },
          {
            "account_id": "acc31",
            "amount_ore": 100
          },
          {
            "account_id": "acc32",
            "amount_ore": 100
          },
          {
            "account_id": "acc33",
            "amount_ore": 100
          },
          {
            "account_id": "acc34",
            "amount_ore": 100
          },
          {
            "account_id": "acc35",
            "amount_ore": 100
          },
          {
            "account_id": "acc36",
            "amount_ore": 100
          },
          {
            "account_id": "acc37",
            "amount_ore": 100
          },
          {
            "account_id": "acc38",
            "amount_ore": 100
          },
          {
            "account_id": "acc39",
            "amount_ore": 100
          },
          {
            "account_id": "acc40",
            "amount_ore": 100
          },
          {
            "account_id": "acc41",
            "amount_ore": 100
          },
          {
            "account_id": "acc42",
            "amount_ore": 100
          },
          {
            "account_id": "acc43",
            "amount_ore": 100
          },
          {
            "account_id": "acc44",
            "amount_ore": 100
          },
          {
            "account_id": "acc45",
            "amount_ore": 100
          },
          {
            "account_id": "acc46",
            "amount_ore": 100
          },
          {
            "account_id": "acc47",
            "amount_ore": 100
          },
          {
            "account_id": "acc48",
            "amount_ore": 100
          },
          {
            "account_id": "acc49",
            "amount_ore": 100
          },
          {
            "account_id": "acc50",
            "amount_ore": 100
          }
        ]
      },
      "expected": {
        "ok": null
      }
    },
    {
      "name": "valid: amount 1 000 000 000 (the maximum)",
      "input": {
        "amount_ore": 1000000000,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 1000000000
          }
        ]
      },
      "expected": {
        "ok": null
      }
    },
    {
      "name": "amount 0",
      "input": {
        "amount_ore": 0,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 0
          }
        ]
      },
      "expected": {
        "error": "amount_out_of_range"
      }
    },
    {
      "name": "amount 1 000 000 001",
      "input": {
        "amount_ore": 1000000001,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 1000000001
          }
        ]
      },
      "expected": {
        "error": "amount_out_of_range"
      }
    },
    {
      "name": "from equals to",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "a",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 500
          }
        ]
      },
      "expected": {
        "error": "same_user"
      }
    },
    {
      "name": "from user unknown",
      "input": {
        "amount_ore": 500,
        "from_user_id": "x",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 500
          }
        ]
      },
      "expected": {
        "error": "user_unknown"
      }
    },
    {
      "name": "to user unknown",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "x",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 500
          }
        ]
      },
      "expected": {
        "error": "user_unknown"
      }
    },
    {
      "name": "no allocations",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": []
      },
      "expected": {
        "error": "no_allocations"
      }
    },
    {
      "name": "51 allocations",
      "input": {
        "amount_ore": 5100,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "acc01",
            "amount_ore": 100
          },
          {
            "account_id": "acc02",
            "amount_ore": 100
          },
          {
            "account_id": "acc03",
            "amount_ore": 100
          },
          {
            "account_id": "acc04",
            "amount_ore": 100
          },
          {
            "account_id": "acc05",
            "amount_ore": 100
          },
          {
            "account_id": "acc06",
            "amount_ore": 100
          },
          {
            "account_id": "acc07",
            "amount_ore": 100
          },
          {
            "account_id": "acc08",
            "amount_ore": 100
          },
          {
            "account_id": "acc09",
            "amount_ore": 100
          },
          {
            "account_id": "acc10",
            "amount_ore": 100
          },
          {
            "account_id": "acc11",
            "amount_ore": 100
          },
          {
            "account_id": "acc12",
            "amount_ore": 100
          },
          {
            "account_id": "acc13",
            "amount_ore": 100
          },
          {
            "account_id": "acc14",
            "amount_ore": 100
          },
          {
            "account_id": "acc15",
            "amount_ore": 100
          },
          {
            "account_id": "acc16",
            "amount_ore": 100
          },
          {
            "account_id": "acc17",
            "amount_ore": 100
          },
          {
            "account_id": "acc18",
            "amount_ore": 100
          },
          {
            "account_id": "acc19",
            "amount_ore": 100
          },
          {
            "account_id": "acc20",
            "amount_ore": 100
          },
          {
            "account_id": "acc21",
            "amount_ore": 100
          },
          {
            "account_id": "acc22",
            "amount_ore": 100
          },
          {
            "account_id": "acc23",
            "amount_ore": 100
          },
          {
            "account_id": "acc24",
            "amount_ore": 100
          },
          {
            "account_id": "acc25",
            "amount_ore": 100
          },
          {
            "account_id": "acc26",
            "amount_ore": 100
          },
          {
            "account_id": "acc27",
            "amount_ore": 100
          },
          {
            "account_id": "acc28",
            "amount_ore": 100
          },
          {
            "account_id": "acc29",
            "amount_ore": 100
          },
          {
            "account_id": "acc30",
            "amount_ore": 100
          },
          {
            "account_id": "acc31",
            "amount_ore": 100
          },
          {
            "account_id": "acc32",
            "amount_ore": 100
          },
          {
            "account_id": "acc33",
            "amount_ore": 100
          },
          {
            "account_id": "acc34",
            "amount_ore": 100
          },
          {
            "account_id": "acc35",
            "amount_ore": 100
          },
          {
            "account_id": "acc36",
            "amount_ore": 100
          },
          {
            "account_id": "acc37",
            "amount_ore": 100
          },
          {
            "account_id": "acc38",
            "amount_ore": 100
          },
          {
            "account_id": "acc39",
            "amount_ore": 100
          },
          {
            "account_id": "acc40",
            "amount_ore": 100
          },
          {
            "account_id": "acc41",
            "amount_ore": 100
          },
          {
            "account_id": "acc42",
            "amount_ore": 100
          },
          {
            "account_id": "acc43",
            "amount_ore": 100
          },
          {
            "account_id": "acc44",
            "amount_ore": 100
          },
          {
            "account_id": "acc45",
            "amount_ore": 100
          },
          {
            "account_id": "acc46",
            "amount_ore": 100
          },
          {
            "account_id": "acc47",
            "amount_ore": 100
          },
          {
            "account_id": "acc48",
            "amount_ore": 100
          },
          {
            "account_id": "acc49",
            "amount_ore": 100
          },
          {
            "account_id": "acc50",
            "amount_ore": 100
          },
          {
            "account_id": "acc51",
            "amount_ore": 100
          }
        ]
      },
      "expected": {
        "error": "too_many_allocations"
      }
    },
    {
      "name": "an allocation of 0",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 500
          },
          {
            "account_id": "y",
            "amount_ore": 0
          }
        ]
      },
      "expected": {
        "error": "allocation_not_positive"
      }
    },
    {
      "name": "a negative allocation",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 600
          },
          {
            "account_id": "y",
            "amount_ore": -100
          }
        ]
      },
      "expected": {
        "error": "allocation_not_positive"
      }
    },
    {
      "name": "the same account twice",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 200
          },
          {
            "account_id": "x",
            "amount_ore": 300
          }
        ]
      },
      "expected": {
        "error": "duplicate_account"
      }
    },
    {
      "name": "allocations sum below the amount",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 200
          },
          {
            "account_id": "y",
            "amount_ore": 299
          }
        ]
      },
      "expected": {
        "error": "allocation_sum_mismatch"
      }
    },
    {
      "name": "allocations sum above the amount",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 200
          },
          {
            "account_id": "y",
            "amount_ore": 301
          }
        ]
      },
      "expected": {
        "error": "allocation_sum_mismatch"
      }
    },
    {
      "name": "error order: amount before same user",
      "input": {
        "amount_ore": 0,
        "from_user_id": "a",
        "to_user_id": "a",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": []
      },
      "expected": {
        "error": "amount_out_of_range"
      }
    },
    {
      "name": "error order: same user before user unknown",
      "input": {
        "amount_ore": 500,
        "from_user_id": "x",
        "to_user_id": "x",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 500
          }
        ]
      },
      "expected": {
        "error": "same_user"
      }
    },
    {
      "name": "error order: user unknown before no allocations",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "x",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": []
      },
      "expected": {
        "error": "user_unknown"
      }
    },
    {
      "name": "error order: too many allocations before allocation not positive",
      "input": {
        "amount_ore": 5100,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "acc01",
            "amount_ore": 0
          },
          {
            "account_id": "acc02",
            "amount_ore": 102
          },
          {
            "account_id": "acc03",
            "amount_ore": 102
          },
          {
            "account_id": "acc04",
            "amount_ore": 102
          },
          {
            "account_id": "acc05",
            "amount_ore": 102
          },
          {
            "account_id": "acc06",
            "amount_ore": 102
          },
          {
            "account_id": "acc07",
            "amount_ore": 102
          },
          {
            "account_id": "acc08",
            "amount_ore": 102
          },
          {
            "account_id": "acc09",
            "amount_ore": 102
          },
          {
            "account_id": "acc10",
            "amount_ore": 102
          },
          {
            "account_id": "acc11",
            "amount_ore": 102
          },
          {
            "account_id": "acc12",
            "amount_ore": 102
          },
          {
            "account_id": "acc13",
            "amount_ore": 102
          },
          {
            "account_id": "acc14",
            "amount_ore": 102
          },
          {
            "account_id": "acc15",
            "amount_ore": 102
          },
          {
            "account_id": "acc16",
            "amount_ore": 102
          },
          {
            "account_id": "acc17",
            "amount_ore": 102
          },
          {
            "account_id": "acc18",
            "amount_ore": 102
          },
          {
            "account_id": "acc19",
            "amount_ore": 102
          },
          {
            "account_id": "acc20",
            "amount_ore": 102
          },
          {
            "account_id": "acc21",
            "amount_ore": 102
          },
          {
            "account_id": "acc22",
            "amount_ore": 102
          },
          {
            "account_id": "acc23",
            "amount_ore": 102
          },
          {
            "account_id": "acc24",
            "amount_ore": 102
          },
          {
            "account_id": "acc25",
            "amount_ore": 102
          },
          {
            "account_id": "acc26",
            "amount_ore": 102
          },
          {
            "account_id": "acc27",
            "amount_ore": 102
          },
          {
            "account_id": "acc28",
            "amount_ore": 102
          },
          {
            "account_id": "acc29",
            "amount_ore": 102
          },
          {
            "account_id": "acc30",
            "amount_ore": 102
          },
          {
            "account_id": "acc31",
            "amount_ore": 102
          },
          {
            "account_id": "acc32",
            "amount_ore": 102
          },
          {
            "account_id": "acc33",
            "amount_ore": 102
          },
          {
            "account_id": "acc34",
            "amount_ore": 102
          },
          {
            "account_id": "acc35",
            "amount_ore": 102
          },
          {
            "account_id": "acc36",
            "amount_ore": 102
          },
          {
            "account_id": "acc37",
            "amount_ore": 102
          },
          {
            "account_id": "acc38",
            "amount_ore": 102
          },
          {
            "account_id": "acc39",
            "amount_ore": 102
          },
          {
            "account_id": "acc40",
            "amount_ore": 102
          },
          {
            "account_id": "acc41",
            "amount_ore": 102
          },
          {
            "account_id": "acc42",
            "amount_ore": 102
          },
          {
            "account_id": "acc43",
            "amount_ore": 102
          },
          {
            "account_id": "acc44",
            "amount_ore": 102
          },
          {
            "account_id": "acc45",
            "amount_ore": 102
          },
          {
            "account_id": "acc46",
            "amount_ore": 102
          },
          {
            "account_id": "acc47",
            "amount_ore": 102
          },
          {
            "account_id": "acc48",
            "amount_ore": 102
          },
          {
            "account_id": "acc49",
            "amount_ore": 102
          },
          {
            "account_id": "acc50",
            "amount_ore": 102
          },
          {
            "account_id": "acc51",
            "amount_ore": 102
          }
        ]
      },
      "expected": {
        "error": "too_many_allocations"
      }
    },
    {
      "name": "error order: allocation not positive before duplicate account",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 500
          },
          {
            "account_id": "x",
            "amount_ore": 0
          }
        ]
      },
      "expected": {
        "error": "allocation_not_positive"
      }
    },
    {
      "name": "error order: duplicate account before sum mismatch",
      "input": {
        "amount_ore": 500,
        "from_user_id": "a",
        "to_user_id": "b",
        "user_ids": [
          "a",
          "b"
        ],
        "allocations": [
          {
            "account_id": "x",
            "amount_ore": 100
          },
          {
            "account_id": "x",
            "amount_ore": 100
          }
        ]
      },
      "expected": {
        "error": "duplicate_account"
      }
    }
  ]
}