850f3a62c8
Pure Go implementation of patent litigation cost calculator with: - Step-based GKG/RVG fee accumulator across 4 historical schedules (2005/2013/2021/2025 + Aktuell alias) - Instance multiplier tables for 8 court types (LG, OLG, BGH NZB/Rev, BPatG, BGH Null, DPMA, BPatG Canc) - Full attorney fee calculation (VG, TG, Erhöhungsgebühr Nr. 1008 VV RVG, Auslagenpauschale) - Prozesskostensicherheit computation - UPC fee data (pre-2026 and 2026 schedules with value-based brackets, recoverable costs ceilings) - Public API: POST /api/fees/calculate, GET /api/fees/schedules (no auth required) - 22 unit tests covering all calculation paths Fixes 3 Excel bugs: - Bug 1: Prozesskostensicherheit VAT formula (subtract → add) - Bug 2: Security for costs uses GKG base for court fee, not RVG - Bug 3: Expert fees included in BPatG instance total
126 lines
4.7 KiB
Go
126 lines
4.7 KiB
Go
package models
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// FeeScheduleVersion identifies a fee schedule version.
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type FeeScheduleVersion string
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const (
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FeeVersion2005 FeeScheduleVersion = "2005"
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FeeVersion2013 FeeScheduleVersion = "2013"
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FeeVersion2021 FeeScheduleVersion = "2021"
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FeeVersion2025 FeeScheduleVersion = "2025"
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FeeVersionAktuell FeeScheduleVersion = "Aktuell"
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)
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// InstanceType identifies a court instance.
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type InstanceType string
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const (
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InstanceLG InstanceType = "LG"
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InstanceOLG InstanceType = "OLG"
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InstanceBGHNZB InstanceType = "BGH_NZB"
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InstanceBGHRev InstanceType = "BGH_Rev"
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InstanceBPatG InstanceType = "BPatG"
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InstanceBGHNull InstanceType = "BGH_Null"
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InstanceDPMA InstanceType = "DPMA"
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InstanceBPatGCanc InstanceType = "BPatG_Canc"
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)
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// ProceedingPath identifies the type of patent litigation proceeding.
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type ProceedingPath string
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const (
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PathInfringement ProceedingPath = "infringement"
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PathNullity ProceedingPath = "nullity"
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PathCancellation ProceedingPath = "cancellation"
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)
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// --- Request ---
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// FeeCalculateRequest is the request body for POST /api/fees/calculate.
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type FeeCalculateRequest struct {
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Streitwert float64 `json:"streitwert"`
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VATRate float64 `json:"vat_rate"`
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ProceedingPath ProceedingPath `json:"proceeding_path"`
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Instances []InstanceInput `json:"instances"`
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IncludeSecurityCosts bool `json:"include_security_costs"`
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}
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// InstanceInput configures one court instance in the calculation request.
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type InstanceInput struct {
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Type InstanceType `json:"type"`
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Enabled bool `json:"enabled"`
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FeeVersion FeeScheduleVersion `json:"fee_version"`
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NumAttorneys int `json:"num_attorneys"`
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NumPatentAttorneys int `json:"num_patent_attorneys"`
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NumClients int `json:"num_clients"`
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OralHearing bool `json:"oral_hearing"`
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ExpertFees float64 `json:"expert_fees"`
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}
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// --- Response ---
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// FeeCalculateResponse is the response for POST /api/fees/calculate.
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type FeeCalculateResponse struct {
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Instances []InstanceResult `json:"instances"`
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Totals []FeeTotal `json:"totals"`
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SecurityForCosts *SecurityForCosts `json:"security_for_costs,omitempty"`
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}
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// InstanceResult contains the cost breakdown for one court instance.
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type InstanceResult struct {
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Type InstanceType `json:"type"`
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Label string `json:"label"`
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CourtFeeBase float64 `json:"court_fee_base"`
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CourtFeeMultiplier float64 `json:"court_fee_multiplier"`
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CourtFeeSource string `json:"court_fee_source"`
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CourtFee float64 `json:"court_fee"`
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ExpertFees float64 `json:"expert_fees"`
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CourtSubtotal float64 `json:"court_subtotal"`
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AttorneyBreakdown *AttorneyBreakdown `json:"attorney_breakdown,omitempty"`
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PatentAttorneyBreakdown *AttorneyBreakdown `json:"patent_attorney_breakdown,omitempty"`
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AttorneySubtotal float64 `json:"attorney_subtotal"`
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PatentAttorneySubtotal float64 `json:"patent_attorney_subtotal"`
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InstanceTotal float64 `json:"instance_total"`
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}
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// AttorneyBreakdown details the fee computation for one attorney type.
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type AttorneyBreakdown struct {
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BaseFee float64 `json:"base_fee"`
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VGFactor float64 `json:"vg_factor"`
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VGFee float64 `json:"vg_fee"`
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IncreaseFee float64 `json:"increase_fee"`
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TGFactor float64 `json:"tg_factor"`
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TGFee float64 `json:"tg_fee"`
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Pauschale float64 `json:"pauschale"`
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SubtotalNet float64 `json:"subtotal_net"`
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VAT float64 `json:"vat"`
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SubtotalGross float64 `json:"subtotal_gross"`
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Count int `json:"count"`
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TotalGross float64 `json:"total_gross"`
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}
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// FeeTotal is a labeled total amount.
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type FeeTotal struct {
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Label string `json:"label"`
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Total float64 `json:"total"`
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}
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// SecurityForCosts is the Prozesskostensicherheit calculation result.
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type SecurityForCosts struct {
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Instance1 float64 `json:"instance_1"`
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Instance2 float64 `json:"instance_2"`
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NZB float64 `json:"nzb"`
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SubtotalNet float64 `json:"subtotal_net"`
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VAT float64 `json:"vat"`
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TotalGross float64 `json:"total_gross"`
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}
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// FeeScheduleInfo describes a fee schedule version for the schedules endpoint.
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type FeeScheduleInfo struct {
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Key string `json:"key"`
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Label string `json:"label"`
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ValidFrom string `json:"valid_from"`
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IsAlias bool `json:"is_alias,omitempty"`
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AliasOf string `json:"alias_of,omitempty"`
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}
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