{
  "schema_version": "d30-tiered-fee-fixtures-v1",
  "classification": "Synthetic authored tariff; full expected outputs and independent Fraction arithmetic before reference implementation.",
  "cases": [
    {
      "id": "canonical-1250-capped",
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        "calculation_id": "CALC-FEE-OCT",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "effective_until": null,
          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
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          "measure_unit": "transaction_count",
          "period_start": "2026-10-01",
          "period_end": "2026-11-01",
          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "ok",
        "code": "FEE_CALCULATED",
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          "ledger_id": "CB-GENERAL",
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          "period_end": "2026-11-01",
          "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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          "version_id": "V1",
          "measure_unit": "transaction_count",
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          "raw_fee_exact": {
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            "denominator": "1"
          },
          "rounded_before_bounds_minor": "2050",
          "rounding_residual": {
            "numerator": "0",
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          },
          "minimum_applied": false,
          "cap_applied": true,
          "zero_usage_exemption": false,
          "fee_minor": "2000"
        },
        "trace": [
          {
            "index": 0,
            "lower_bound_units": "0",
            "upper_bound_units": "100",
            "rate_microminor_per_unit": "0",
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            "exact_segment_fee": {
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            }
          },
          {
            "index": 1,
            "lower_bound_units": "100",
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            "rate_microminor_per_unit": "2000000",
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            "exact_segment_fee": {
              "numerator": "1800",
              "denominator": "1"
            }
          },
          {
            "index": 2,
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            "upper_bound_units": null,
            "rate_microminor_per_unit": "1000000",
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            "exact_segment_fee": {
              "numerator": "250",
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            }
          }
        ],
        "posting_proposal": {
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          "period_end": "2026-11-01",
          "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
          "schema_version": "d30-fee-proposal-v1",
          "status": "ready",
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          "legs": [
            {
              "account_id": "deposits_product_usd",
              "side": "debit",
              "amount_minor": "2000"
            },
            {
              "account_id": "fee_income_usd",
              "side": "credit",
              "amount_minor": "2000"
            }
          ]
        }
      }
    },
    {
      "id": "marginal-0",
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        "ledger_id": "CB-GENERAL",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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          "effective_until": null,
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            {
              "upper_bound_units": "100",
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            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
          "quantity_units": "0",
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          "period_end": "2026-11-01",
          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "ok",
        "code": "FEE_CALCULATED",
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          "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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          "tariff_id": "TARIFF-COUNT",
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          },
          "rounded_before_bounds_minor": "0",
          "rounding_residual": {
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          },
          "minimum_applied": false,
          "cap_applied": false,
          "zero_usage_exemption": true,
          "fee_minor": "0"
        },
        "trace": [
          {
            "index": 0,
            "lower_bound_units": "0",
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            "rate_microminor_per_unit": "0",
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            "exact_segment_fee": {
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            }
          },
          {
            "index": 1,
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            }
          },
          {
            "index": 2,
            "lower_bound_units": "1000",
            "upper_bound_units": null,
            "rate_microminor_per_unit": "1000000",
            "allocated_quantity_units": "0",
            "exact_segment_fee": {
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            }
          }
        ],
        "posting_proposal": {
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          "account_id": "deposits_product_usd",
          "currency": "USD",
          "period_start": "2026-10-01",
          "period_end": "2026-11-01",
          "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
          "schema_version": "d30-fee-proposal-v1",
          "status": "zero",
          "amount_minor": "0",
          "legs": []
        }
      }
    },
    {
      "id": "marginal-99",
      "input": {
        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "effective_from": "2026-10-01",
          "effective_until": null,
          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
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          "period_end": "2026-11-01",
          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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          },
          "rounded_before_bounds_minor": "0",
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          },
          "minimum_applied": false,
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          "zero_usage_exemption": false,
          "fee_minor": "0"
        },
        "trace": [
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            "index": 0,
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            }
          },
          {
            "index": 1,
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            }
          },
          {
            "index": 2,
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            }
          }
        ],
        "posting_proposal": {
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          "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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          "status": "zero",
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          "legs": []
        }
      }
    },
    {
      "id": "marginal-100",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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            {
              "upper_bound_units": "100",
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            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
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            }
          ],
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        },
        "usage": {
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        }
      },
      "expected": {
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          },
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        },
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          },
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          },
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          }
        ],
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        }
      }
    },
    {
      "id": "marginal-101",
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            }
          ],
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        },
        "usage": {
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        }
      },
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          },
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          }
        ],
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            },
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            }
          ]
        }
      }
    },
    {
      "id": "marginal-1000",
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            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
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              "rate_microminor_per_unit": "1000000"
            }
          ],
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        },
        "usage": {
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        }
      },
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          "tariff_id": "TARIFF-COUNT",
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          },
          "rounded_before_bounds_minor": "2050",
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            "numerator": "0",
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          },
          "minimum_applied": false,
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          "zero_usage_exemption": false,
          "fee_minor": "2000"
        },
        "trace": [
          {
            "index": 0,
            "lower_bound_units": "0",
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            "rate_microminor_per_unit": "0",
            "allocated_quantity_units": "100",
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          },
          {
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          },
          {
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          }
        ],
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            {
              "account_id": "fee_income_usd",
              "side": "credit",
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          ]
        }
      }
    },
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      "id": "bad-request-schema_version",
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            {
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        },
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      },
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    },
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
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      },
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    },
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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            {
              "upper_bound_units": "1000",
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              "rate_microminor_per_unit": "1000000"
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          ],
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
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      },
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    },
    {
      "id": "bad-request-account_type",
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            {
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          ],
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
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      },
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    },
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      "id": "bad-request-normal_side",
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          ],
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      },
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    },
    {
      "id": "bad-request-account_id",
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      },
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      }
    },
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      },
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    },
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          ],
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          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
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      }
    },
    {
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          ],
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
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        "posting_proposal": null
      }
    },
    {
      "id": "bad-request-knowledge_cutoff",
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        "knowledge_cutoff": "2026-10-31T23:59:59.999Z",
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            {
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            {
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          ],
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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        "code": "INCOMPLETE_PERIOD",
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        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "bad-request-knowledge_cutoff",
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        "currency": "USD",
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        "knowledge_cutoff": "2026-11-01T24:00:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "measure_unit": "transaction_count",
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          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
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            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_TIMESTAMP",
        "fee": null,
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      }
    },
    {
      "id": "bad-request-tariff",
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        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
        "entity_id": "CB-A",
        "account_id": "deposits_product_usd",
        "account_type": "liability",
        "normal_side": "credit",
        "currency": "USD",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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        "tariff": null,
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_SCHEMA",
        "fee": null,
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        "posting_proposal": null
      }
    },
    {
      "id": "bad-request-usage",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "account_id": "deposits_product_usd",
        "account_type": "liability",
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        "currency": "USD",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "measure_unit": "transaction_count",
          "effective_from": "2026-10-01",
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          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
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            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
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        },
        "usage": []
      },
      "expected": {
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        "code": "INVALID_SCHEMA",
        "fee": null,
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      }
    },
    {
      "id": "missing-schema_version",
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        "calculation_id": "CALC-FEE-OCT",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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            {
              "upper_bound_units": "100",
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            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
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        },
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          "available_at": "2026-11-01T00:00:01.000Z",
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      },
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    },
    {
      "id": "missing-calculation_id",
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        "schema_version": "d30-tiered-fee-v1",
        "ledger_id": "CB-GENERAL",
        "entity_id": "CB-A",
        "account_id": "deposits_product_usd",
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        "normal_side": "credit",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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          "measure_unit": "transaction_count",
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          "effective_until": null,
          "available_at": "2026-09-30T12:00:00.000Z",
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            {
              "upper_bound_units": "100",
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            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
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          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
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      },
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      }
    },
    {
      "id": "missing-ledger_id",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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            {
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            {
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              "rate_microminor_per_unit": "2000000"
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            {
              "upper_bound_units": null,
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          ],
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          "available_at": "2026-11-01T00:00:01.000Z",
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      },
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    },
    {
      "id": "missing-entity_id",
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            {
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            {
              "upper_bound_units": "1000",
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            {
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          ],
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        }
      },
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    },
    {
      "id": "missing-account_id",
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            {
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          ],
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      },
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    },
    {
      "id": "missing-account_type",
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          ],
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      },
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      }
    },
    {
      "id": "missing-normal_side",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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            {
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          ],
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        },
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      },
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      }
    },
    {
      "id": "missing-currency",
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        "ledger_id": "CB-GENERAL",
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            {
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            },
            {
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          ],
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        },
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      },
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      }
    },
    {
      "id": "missing-period_start",
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          ],
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        },
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          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
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      }
    },
    {
      "id": "missing-period_end",
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        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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            },
            {
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            },
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            }
          ],
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        },
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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        "posting_proposal": null
      }
    },
    {
      "id": "missing-knowledge_cutoff",
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        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "account_type": "liability",
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          "measure_unit": "transaction_count",
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            {
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            },
            {
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            },
            {
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            }
          ],
          "minimum_minor": "0",
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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        "code": "INVALID_SCHEMA",
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        "posting_proposal": null
      }
    },
    {
      "id": "missing-mode",
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        "ledger_id": "CB-GENERAL",
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        "account_id": "deposits_product_usd",
        "account_type": "liability",
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        "currency": "USD",
        "period_start": "2026-10-01",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
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          ],
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        },
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
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        "status": "rejected",
        "code": "INVALID_SCHEMA",
        "fee": null,
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        "posting_proposal": null
      }
    },
    {
      "id": "missing-tariff",
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      },
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    },
    {
      "id": "missing-usage",
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            {
              "upper_bound_units": "1000",
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            {
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              "rate_microminor_per_unit": "1000000"
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          ],
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      },
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    },
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      "id": "extra-request-key",
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            {
              "upper_bound_units": "1000",
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          ],
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          "receipt_ref": "COUNT-OCT-COMPLETE"
        },
        "extra": 0
      },
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    },
    {
      "id": "bad-tariff-currency",
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        "tariff": {
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            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
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              "upper_bound_units": null,
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          ],
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          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
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        "code": "CURRENCY_MISMATCH",
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      }
    },
    {
      "id": "bad-tariff-measure_unit",
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            {
              "upper_bound_units": "1000",
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          "receipt_ref": "COUNT-OCT-COMPLETE"
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      },
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      }
    },
    {
      "id": "bad-tariff-effective_from",
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            {
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          ],
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        }
      },
      "expected": {
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      }
    },
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            {
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            {
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        "usage": {
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          "receipt_ref": "COUNT-OCT-COMPLETE"
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      },
      "expected": {
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      }
    },
    {
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          ],
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          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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      }
    },
    {
      "id": "bad-tariff-available_at",
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            {
              "upper_bound_units": "1000",
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        },
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          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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        "code": "TARIFF_NOT_AVAILABLE",
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      }
    },
    {
      "id": "bad-tariff-minimum_minor",
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        "mode": "marginal",
        "tariff": {
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            {
              "upper_bound_units": "100",
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            },
            {
              "upper_bound_units": "1000",
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            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "2001",
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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        "code": "INVALID_BOUNDS",
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        "posting_proposal": null
      }
    },
    {
      "id": "bad-tariff-cap_minor",
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        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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            {
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            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "-1"
        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_AMOUNT",
        "fee": null,
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        "posting_proposal": null
      }
    },
    {
      "id": "bad-tariff-minimum_minor",
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        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "account_type": "liability",
        "normal_side": "credit",
        "currency": "USD",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "currency": "USD",
          "measure_unit": "transaction_count",
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          "effective_until": null,
          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": 0,
          "cap_minor": "2000"
        },
        "usage": {
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          "measure_unit": "transaction_count",
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_AMOUNT",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "bad-tariff-tiers",
      "input": {
        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
        "entity_id": "CB-A",
        "account_id": "deposits_product_usd",
        "account_type": "liability",
        "normal_side": "credit",
        "currency": "USD",
        "period_start": "2026-10-01",
        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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    },
    {
      "id": "bad-upper-73",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
        "entity_id": "CB-A",
        "account_id": "deposits_product_usd",
        "account_type": "liability",
        "normal_side": "credit",
        "currency": "USD",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
          "tariff_id": "TARIFF-COUNT",
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            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
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            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
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          ],
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_TIERS",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "bad-upper-74",
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        "schema_version": "d30-tiered-fee-v1",
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        "ledger_id": "CB-GENERAL",
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            {
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              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
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        "status": "rejected",
        "code": "INVALID_TIERS",
        "fee": null,
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      }
    },
    {
      "id": "bad-upper-75",
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        "ledger_id": "CB-GENERAL",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": "01000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_AMOUNT",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "bad-upper-76",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "currency": "USD",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "effective_until": null,
          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": 1000,
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_AMOUNT",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "finite-final-tier",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "currency": "USD",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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        "tariff": {
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          "available_at": "2026-09-30T12:00:00.000Z",
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            {
              "upper_bound_units": "100",
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            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": "2000",
              "rate_microminor_per_unit": "1000000"
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          ],
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        },
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_TIERS",
        "fee": null,
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      }
    },
    {
      "id": "negative-unit-price",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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        "tariff": {
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            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "-1"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
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          ],
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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        "fee": null,
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      }
    },
    {
      "id": "invalid-root-79",
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        "status": "rejected",
        "code": "INVALID_SCHEMA",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "invalid-root-80",
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        "code": "INVALID_SCHEMA",
        "fee": null,
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      }
    },
    {
      "id": "invalid-root-81",
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        "fee": null,
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        "posting_proposal": null
      }
    },
    {
      "id": "invalid-root-82",
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        "code": "INVALID_SCHEMA",
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      }
    },
    {
      "id": "missing-tariff-tariff_id",
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        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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          "available_at": "2026-09-30T12:00:00.000Z",
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            {
              "upper_bound_units": "100",
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            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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        "code": "INVALID_SCHEMA",
        "fee": null,
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        "posting_proposal": null
      }
    },
    {
      "id": "missing-tariff-version_id",
      "input": {
        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "account_type": "liability",
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        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
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        "tariff": {
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          "available_at": "2026-09-30T12:00:00.000Z",
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            {
              "upper_bound_units": "100",
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            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
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        "code": "INVALID_SCHEMA",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "missing-tariff-currency",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "account_id": "deposits_product_usd",
        "account_type": "liability",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "measure_unit": "transaction_count",
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          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
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            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
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        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_SCHEMA",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "missing-tariff-measure_unit",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "account_type": "liability",
        "normal_side": "credit",
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        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_SCHEMA",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "missing-tariff-effective_from",
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        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
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        "account_id": "deposits_product_usd",
        "account_type": "liability",
        "normal_side": "credit",
        "currency": "USD",
        "period_start": "2026-10-01",
        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
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          "version_id": "V1",
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          "measure_unit": "transaction_count",
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          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
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          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_SCHEMA",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "missing-tariff-effective_until",
      "input": {
        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
        "ledger_id": "CB-GENERAL",
        "entity_id": "CB-A",
        "account_id": "deposits_product_usd",
        "account_type": "liability",
        "normal_side": "credit",
        "currency": "USD",
        "period_start": "2026-10-01",
        "period_end": "2026-11-01",
        "knowledge_cutoff": "2026-11-01T00:01:00.000Z",
        "mode": "marginal",
        "tariff": {
          "tariff_id": "TARIFF-COUNT",
          "version_id": "V1",
          "currency": "USD",
          "measure_unit": "transaction_count",
          "effective_from": "2026-10-01",
          "available_at": "2026-09-30T12:00:00.000Z",
          "tiers": [
            {
              "upper_bound_units": "100",
              "rate_microminor_per_unit": "0"
            },
            {
              "upper_bound_units": "1000",
              "rate_microminor_per_unit": "2000000"
            },
            {
              "upper_bound_units": null,
              "rate_microminor_per_unit": "1000000"
            }
          ],
          "minimum_minor": "0",
          "cap_minor": "2000"
        },
        "usage": {
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          "measure_unit": "transaction_count",
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          "period_end": "2026-11-01",
          "available_at": "2026-11-01T00:00:01.000Z",
          "receipt_ref": "COUNT-OCT-COMPLETE"
        }
      },
      "expected": {
        "status": "rejected",
        "code": "INVALID_SCHEMA",
        "fee": null,
        "trace": [],
        "posting_proposal": null
      }
    },
    {
      "id": "missing-tariff-available_at",
      "input": {
        "schema_version": "d30-tiered-fee-v1",
        "calculation_id": "CALC-FEE-OCT",
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      },
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    },
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    },
    {
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      },
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    },
    {
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          "extra": 0
        }
      },
      "expected": {
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      }
    }
  ]
}
