Documentation
¶
Overview ¶
Package modelcatalog provides a pricing manager for the framework.
Index ¶
- Constants
- type Config
- type ModelCatalog
- func (mc *ModelCatalog) CalculateCost(result *schemas.BifrostResponse) float64
- func (mc *ModelCatalog) Cleanup() error
- func (mc *ModelCatalog) DeleteModelDataForProvider(provider schemas.ModelProvider)
- func (mc *ModelCatalog) DeleteProviderPricingOverrides(provider schemas.ModelProvider)
- func (mc *ModelCatalog) ForceReloadPricing(ctx context.Context) error
- func (mc *ModelCatalog) GetBaseModelName(model string) string
- func (mc *ModelCatalog) GetDistinctBaseModelNames() []string
- func (mc *ModelCatalog) GetModelCapabilityEntryForModel(model string, provider schemas.ModelProvider) *PricingEntry
- func (mc *ModelCatalog) GetModelsForProvider(provider schemas.ModelProvider) []string
- func (mc *ModelCatalog) GetPricingEntryForModel(model string, provider schemas.ModelProvider) *PricingEntry
- func (mc *ModelCatalog) GetProviderModelSnapshotHealthReport() ProviderModelSnapshotHealthReport
- func (mc *ModelCatalog) GetProvidersForModel(model string) []schemas.ModelProvider
- func (mc *ModelCatalog) GetUnfilteredModelsForProvider(provider schemas.ModelProvider) []string
- func (mc *ModelCatalog) IsModelAllowedForProvider(provider schemas.ModelProvider, model string, ...) bool
- func (mc *ModelCatalog) IsSameModel(model1, model2 string) bool
- func (mc *ModelCatalog) IsTextCompletionSupported(model string, provider schemas.ModelProvider) bool
- func (mc *ModelCatalog) RecordProviderModelDiscoveryResult(provider schemas.ModelProvider, unfiltered bool, ...)
- func (mc *ModelCatalog) RefineModelForProvider(provider schemas.ModelProvider, model string) (string, error)
- func (mc *ModelCatalog) ReloadPricing(ctx context.Context, config *Config) error
- func (mc *ModelCatalog) SetProviderPricingOverrides(provider schemas.ModelProvider, overrides []schemas.ProviderPricingOverride) error
- func (mc *ModelCatalog) UpsertModelDataForProvider(provider schemas.ModelProvider, modelData *schemas.BifrostListModelsResponse, ...)
- func (mc *ModelCatalog) UpsertUnfilteredModelDataForProvider(provider schemas.ModelProvider, modelData *schemas.BifrostListModelsResponse)
- type PricingEntry
- type ProviderModelDiscoveryHealth
- type ProviderModelHealthStatus
- type ProviderModelSnapshotHealth
- type ProviderModelSnapshotHealthReport
- type ProviderModelSnapshotHealthSummary
- type ProviderModelSource
- type ShouldSyncPricingFunc
Constants ¶
const ( DefaultPricingSyncInterval = 24 * time.Hour MinimumPricingSyncIntervalSec = int64(3600) ConfigLastPricingSyncKey = "LastModelPricingSync" ConfigLastParamsSyncKey = "LastModelParametersSync" ConfigProviderModelHealthStateKey = "ProviderModelHealthStateV1" DefaultPricingURL = "https://getbifrost.ai/datasheet" DefaultModelParametersURL = "https://getbifrost.ai/datasheet/model-parameters" DefaultPricingTimeout = 45 * time.Second DefaultModelParametersTimeout = 45 * time.Second )
const ( TokenTierAbove272K = 272000 TokenTierAbove200K = 200000 TokenTierAbove128K = 128000 )
Default sync interval and config key
const DefaultProviderModelHealthPersistDebounce = 500 * time.Millisecond
const DefaultProviderModelSnapshotStaleAfter = 24 * time.Hour
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Config ¶
type Config struct {
PricingURL *string `json:"pricing_url,omitempty"`
PricingSyncInterval *int64 `json:"pricing_sync_interval,omitempty"` // seconds
ProviderModelHealthPersistDebounce *time.Duration `json:"provider_model_health_persist_debounce_ms,omitempty"`
}
Config is the model pricing configuration.
type ModelCatalog ¶
type ModelCatalog struct {
// contains filtered or unexported fields
}
func Init ¶
func Init(ctx context.Context, config *Config, configStore configstore.ConfigStore, shouldSyncPricingFunc ShouldSyncPricingFunc, logger schemas.Logger) (*ModelCatalog, error)
Init initializes the model catalog
func NewTestCatalog ¶
func NewTestCatalog(baseModelIndex map[string]string) *ModelCatalog
NewTestCatalog creates a minimal ModelCatalog for testing purposes. It does not start background sync workers or connect to external services.
func (*ModelCatalog) CalculateCost ¶
func (mc *ModelCatalog) CalculateCost(result *schemas.BifrostResponse) float64
CalculateCost calculates the cost of a Bifrost response. It handles all request types, cache debug billing, and tiered pricing.
func (*ModelCatalog) Cleanup ¶
func (mc *ModelCatalog) Cleanup() error
Cleanup cleans up the model catalog
func (*ModelCatalog) DeleteModelDataForProvider ¶
func (mc *ModelCatalog) DeleteModelDataForProvider(provider schemas.ModelProvider)
DeleteModelDataForProvider deletes all model data from the pool for a given provider
func (*ModelCatalog) DeleteProviderPricingOverrides ¶
func (mc *ModelCatalog) DeleteProviderPricingOverrides(provider schemas.ModelProvider)
func (*ModelCatalog) ForceReloadPricing ¶
func (mc *ModelCatalog) ForceReloadPricing(ctx context.Context) error
func (*ModelCatalog) GetBaseModelName ¶
func (mc *ModelCatalog) GetBaseModelName(model string) string
GetBaseModelName returns the canonical base model name for a given model string. It uses the pre-computed base_model from the pricing catalog when available, falling back to algorithmic date/version stripping for models not in the catalog.
Examples:
mc.GetBaseModelName("gpt-4o") // Returns: "gpt-4o"
mc.GetBaseModelName("openai/gpt-4o") // Returns: "gpt-4o"
mc.GetBaseModelName("gpt-4o-2024-08-06") // Returns: "gpt-4o" (algorithmic fallback)
func (*ModelCatalog) GetDistinctBaseModelNames ¶
func (mc *ModelCatalog) GetDistinctBaseModelNames() []string
GetDistinctBaseModelNames returns all unique base model names from the catalog (thread-safe). This is used for governance model selection when no specific provider is chosen.
func (*ModelCatalog) GetModelCapabilityEntryForModel ¶
func (mc *ModelCatalog) GetModelCapabilityEntryForModel(model string, provider schemas.ModelProvider) *PricingEntry
GetModelCapabilityEntryForModel returns capability metadata for a model/provider pair. It prefers chat, then responses, then text-completion entries; if none exist, it falls back to the lexicographically first available mode for deterministic behavior.
func (*ModelCatalog) GetModelsForProvider ¶
func (mc *ModelCatalog) GetModelsForProvider(provider schemas.ModelProvider) []string
GetModelsForProvider returns all available models for a given provider (thread-safe)
func (*ModelCatalog) GetPricingEntryForModel ¶
func (mc *ModelCatalog) GetPricingEntryForModel(model string, provider schemas.ModelProvider) *PricingEntry
GetPricingEntryForModel returns the pricing data
func (*ModelCatalog) GetProviderModelSnapshotHealthReport ¶
func (mc *ModelCatalog) GetProviderModelSnapshotHealthReport() ProviderModelSnapshotHealthReport
func (*ModelCatalog) GetProvidersForModel ¶
func (mc *ModelCatalog) GetProvidersForModel(model string) []schemas.ModelProvider
GetProvidersForModel returns all providers for a given model (thread-safe)
func (*ModelCatalog) GetUnfilteredModelsForProvider ¶
func (mc *ModelCatalog) GetUnfilteredModelsForProvider(provider schemas.ModelProvider) []string
GetUnfilteredModelsForProvider returns all available models for a given provider (thread-safe)
func (*ModelCatalog) IsModelAllowedForProvider ¶
func (mc *ModelCatalog) IsModelAllowedForProvider(provider schemas.ModelProvider, model string, providerConfig *configstore.ProviderConfig, allowedModels []string) bool
IsModelAllowedForProvider checks if a model is allowed for a specific provider based on the allowed models list and catalog data. It handles all cross-provider logic including provider-prefixed models and special routing rules.
Parameters:
- provider: The provider to check against
- model: The model name (without provider prefix, e.g., "gpt-4o" or "claude-3-5-sonnet")
- allowedModels: List of allowed model names (can be empty, can include provider prefixes)
Behavior:
- If allowedModels is empty: Uses model catalog to check if provider supports the model (delegates to GetProvidersForModel which handles all cross-provider logic)
- If allowedModels is not empty: Checks if model matches any entry in the list Provider-specific validation:
- Direct matches: "gpt-4o" in allowedModels for any provider
- Prefixed matches: Only if the prefixed model exists in provider's catalog (e.g., "openai/gpt-4o" in allowedModels only matches if openrouter's catalog contains "openai/gpt-4o" AND the model part matches the request)
Returns:
- bool: true if the model is allowed for the provider, false otherwise
Examples:
// Empty allowedModels - uses catalog
mc.IsModelAllowedForProvider("openrouter", "claude-3-5-sonnet", []string{})
// Returns: true (catalog knows openrouter has "anthropic/claude-3-5-sonnet")
// Explicit allowedModels with prefix - validates against catalog
mc.IsModelAllowedForProvider("openrouter", "gpt-4o", []string{"openai/gpt-4o"})
// Returns: true (openrouter's catalog contains "openai/gpt-4o" AND model part is "gpt-4o")
// Explicit allowedModels with prefix - wrong model
mc.IsModelAllowedForProvider("openrouter", "claude-3-5-sonnet", []string{"openai/gpt-4o"})
// Returns: false (model part "gpt-4o" doesn't match request "claude-3-5-sonnet")
// Explicit allowedModels without prefix
mc.IsModelAllowedForProvider("openai", "gpt-4o", []string{"gpt-4o"})
// Returns: true (direct match)
func (*ModelCatalog) IsSameModel ¶
func (mc *ModelCatalog) IsSameModel(model1, model2 string) bool
IsSameModel checks if two model strings refer to the same underlying model. It compares the canonical base model names derived from the pricing catalog (or algorithmic fallback for models not in the catalog).
Examples:
mc.IsSameModel("gpt-4o", "gpt-4o") // true (direct match)
mc.IsSameModel("openai/gpt-4o", "gpt-4o") // true (same base model)
mc.IsSameModel("gpt-4o", "claude-3-5-sonnet") // false (different models)
mc.IsSameModel("openai/gpt-4o", "anthropic/claude-3-5-sonnet") // false
func (*ModelCatalog) IsTextCompletionSupported ¶
func (mc *ModelCatalog) IsTextCompletionSupported(model string, provider schemas.ModelProvider) bool
IsTextCompletionSupported checks if a model supports text completion for the given provider. Returns true if the model has pricing data for text completion ("text_completion"), false otherwise. This is used by the litellmcompat plugin to determine whether to convert text completion requests to chat completion requests.
func (*ModelCatalog) RecordProviderModelDiscoveryResult ¶
func (mc *ModelCatalog) RecordProviderModelDiscoveryResult( provider schemas.ModelProvider, unfiltered bool, modelData *schemas.BifrostListModelsResponse, discoveryErr *schemas.BifrostError, )
RecordProviderModelDiscoveryResult records one provider model listing attempt (filtered or unfiltered).
func (*ModelCatalog) RefineModelForProvider ¶
func (mc *ModelCatalog) RefineModelForProvider(provider schemas.ModelProvider, model string) (string, error)
RefineModelForProvider refines the model for a given provider by performing a lookup in mc.modelPool and using schemas.ParseModelString to extract provider and model parts. e.g. "gpt-oss-120b" for groq provider -> "openai/gpt-oss-120b"
Behavior: - When the provider's catalog (mc.modelPool) yields multiple matching models, returns an error - When exactly one match is found, returns the fully-qualified model (provider/model format) - When the provider is not handled or no refinement is needed, returns the original model unchanged
func (*ModelCatalog) ReloadPricing ¶
func (mc *ModelCatalog) ReloadPricing(ctx context.Context, config *Config) error
ReloadPricing reloads the model catalog from config
func (*ModelCatalog) SetProviderPricingOverrides ¶
func (mc *ModelCatalog) SetProviderPricingOverrides(provider schemas.ModelProvider, overrides []schemas.ProviderPricingOverride) error
func (*ModelCatalog) UpsertModelDataForProvider ¶
func (mc *ModelCatalog) UpsertModelDataForProvider(provider schemas.ModelProvider, modelData *schemas.BifrostListModelsResponse, allowedModels []schemas.Model, deniedModels []schemas.Model)
UpsertModelDataForProvider upserts model data for a given provider
func (*ModelCatalog) UpsertUnfilteredModelDataForProvider ¶
func (mc *ModelCatalog) UpsertUnfilteredModelDataForProvider(provider schemas.ModelProvider, modelData *schemas.BifrostListModelsResponse)
UpsertUnfilteredModelDataForProvider upserts unfiltered model data for a given provider
type PricingEntry ¶
type PricingEntry struct {
BaseModel string `json:"base_model,omitempty"`
Provider string `json:"provider"`
Mode string `json:"mode"`
ContextLength *int `json:"context_length,omitempty"`
MaxInputTokens *int `json:"max_input_tokens,omitempty"`
MaxOutputTokens *int `json:"max_output_tokens,omitempty"`
Architecture *schemas.Architecture `json:"architecture,omitempty"`
// Costs - Text
InputCostPerToken float64 `json:"input_cost_per_token"`
OutputCostPerToken float64 `json:"output_cost_per_token"`
InputCostPerTokenBatches *float64 `json:"input_cost_per_token_batches,omitempty"`
OutputCostPerTokenBatches *float64 `json:"output_cost_per_token_batches,omitempty"`
InputCostPerTokenPriority *float64 `json:"input_cost_per_token_priority,omitempty"`
OutputCostPerTokenPriority *float64 `json:"output_cost_per_token_priority,omitempty"`
InputCostPerTokenFlex *float64 `json:"input_cost_per_token_flex,omitempty"`
OutputCostPerTokenFlex *float64 `json:"output_cost_per_token_flex,omitempty"`
InputCostPerCharacter *float64 `json:"input_cost_per_character,omitempty"`
// Costs - 128k Tier
InputCostPerTokenAbove128kTokens *float64 `json:"input_cost_per_token_above_128k_tokens,omitempty"`
InputCostPerImageAbove128kTokens *float64 `json:"input_cost_per_image_above_128k_tokens,omitempty"`
InputCostPerVideoPerSecondAbove128kTokens *float64 `json:"input_cost_per_video_per_second_above_128k_tokens,omitempty"`
InputCostPerAudioPerSecondAbove128kTokens *float64 `json:"input_cost_per_audio_per_second_above_128k_tokens,omitempty"`
OutputCostPerTokenAbove128kTokens *float64 `json:"output_cost_per_token_above_128k_tokens,omitempty"`
// Costs - 200k Tier
InputCostPerTokenAbove200kTokens *float64 `json:"input_cost_per_token_above_200k_tokens,omitempty"`
InputCostPerTokenAbove200kTokensPriority *float64 `json:"input_cost_per_token_above_200k_tokens_priority,omitempty"`
OutputCostPerTokenAbove200kTokens *float64 `json:"output_cost_per_token_above_200k_tokens,omitempty"`
OutputCostPerTokenAbove200kTokensPriority *float64 `json:"output_cost_per_token_above_200k_tokens_priority,omitempty"`
// Costs - 272k Tier
InputCostPerTokenAbove272kTokens *float64 `json:"input_cost_per_token_above_272k_tokens,omitempty"`
InputCostPerTokenAbove272kTokensPriority *float64 `json:"input_cost_per_token_above_272k_tokens_priority,omitempty"`
OutputCostPerTokenAbove272kTokens *float64 `json:"output_cost_per_token_above_272k_tokens,omitempty"`
OutputCostPerTokenAbove272kTokensPriority *float64 `json:"output_cost_per_token_above_272k_tokens_priority,omitempty"`
// Costs - Cache
CacheCreationInputTokenCost *float64 `json:"cache_creation_input_token_cost,omitempty"`
CacheReadInputTokenCost *float64 `json:"cache_read_input_token_cost,omitempty"`
CacheCreationInputTokenCostAbove200kTokens *float64 `json:"cache_creation_input_token_cost_above_200k_tokens,omitempty"`
CacheReadInputTokenCostAbove200kTokens *float64 `json:"cache_read_input_token_cost_above_200k_tokens,omitempty"`
CacheReadInputTokenCostAbove200kTokensPriority *float64 `json:"cache_read_input_token_cost_above_200k_tokens_priority,omitempty"`
CacheCreationInputTokenCostAbove1hr *float64 `json:"cache_creation_input_token_cost_above_1hr,omitempty"`
CacheCreationInputTokenCostAbove1hrAbove200kTokens *float64 `json:"cache_creation_input_token_cost_above_1hr_above_200k_tokens,omitempty"`
CacheCreationInputAudioTokenCost *float64 `json:"cache_creation_input_audio_token_cost,omitempty"`
CacheReadInputTokenCostPriority *float64 `json:"cache_read_input_token_cost_priority,omitempty"`
CacheReadInputTokenCostFlex *float64 `json:"cache_read_input_token_cost_flex,omitempty"`
CacheReadInputImageTokenCost *float64 `json:"cache_read_input_image_token_cost,omitempty"`
CacheReadInputTokenCostAbove272kTokens *float64 `json:"cache_read_input_token_cost_above_272k_tokens,omitempty"`
CacheReadInputTokenCostAbove272kTokensPriority *float64 `json:"cache_read_input_token_cost_above_272k_tokens_priority,omitempty"`
// Costs - Image
InputCostPerImage *float64 `json:"input_cost_per_image,omitempty"`
InputCostPerPixel *float64 `json:"input_cost_per_pixel,omitempty"`
OutputCostPerImage *float64 `json:"output_cost_per_image,omitempty"`
OutputCostPerPixel *float64 `json:"output_cost_per_pixel,omitempty"`
OutputCostPerImagePremiumImage *float64 `json:"output_cost_per_image_premium_image,omitempty"`
OutputCostPerImageAbove512x512Pixels *float64 `json:"output_cost_per_image_above_512_and_512_pixels,omitempty"`
OutputCostPerImageAbove512x512PixelsPremium *float64 `json:"output_cost_per_image_above_512_and_512_pixels_and_premium_image,omitempty"`
OutputCostPerImageAbove1024x1024Pixels *float64 `json:"output_cost_per_image_above_1024_and_1024_pixels,omitempty"`
OutputCostPerImageAbove1024x1024PixelsPremium *float64 `json:"output_cost_per_image_above_1024_and_1024_pixels_and_premium_image,omitempty"`
OutputCostPerImageAbove2048x2048Pixels *float64 `json:"output_cost_per_image_above_2048_and_2048_pixels,omitempty"`
OutputCostPerImageAbove4096x4096Pixels *float64 `json:"output_cost_per_image_above_4096_and_4096_pixels,omitempty"`
OutputCostPerImageLowQuality *float64 `json:"output_cost_per_image_low_quality,omitempty"`
OutputCostPerImageMediumQuality *float64 `json:"output_cost_per_image_medium_quality,omitempty"`
OutputCostPerImageHighQuality *float64 `json:"output_cost_per_image_high_quality,omitempty"`
OutputCostPerImageAutoQuality *float64 `json:"output_cost_per_image_auto_quality,omitempty"`
InputCostPerImageToken *float64 `json:"input_cost_per_image_token,omitempty"`
OutputCostPerImageToken *float64 `json:"output_cost_per_image_token,omitempty"`
// Costs - Audio/Video
InputCostPerAudioToken *float64 `json:"input_cost_per_audio_token,omitempty"`
InputCostPerAudioPerSecond *float64 `json:"input_cost_per_audio_per_second,omitempty"`
InputCostPerSecond *float64 `json:"input_cost_per_second,omitempty"`
InputCostPerVideoPerSecond *float64 `json:"input_cost_per_video_per_second,omitempty"`
OutputCostPerAudioToken *float64 `json:"output_cost_per_audio_token,omitempty"`
OutputCostPerVideoPerSecond *float64 `json:"output_cost_per_video_per_second,omitempty"`
OutputCostPerSecond *float64 `json:"output_cost_per_second,omitempty"`
// Costs - Other
//
// SearchContextCostPerQuery is stored as a single float64, but the pricing datasheet
// represents it as a tiered object with three keys: search_context_size_low,
// search_context_size_medium, and search_context_size_high. For every provider except
// Perplexity the three tier values are identical, so we collapse the object to its
// medium tier value (falling back to low then high). Perplexity always returns a
// pre-computed total_cost in its usage response, so the per-query rate is never
// consumed for that provider; the collapsed value is therefore correct in all cases.
// See UnmarshalJSON below for the custom decoding logic.
SearchContextCostPerQuery *float64 `json:"search_context_cost_per_query,omitempty"`
CodeInterpreterCostPerSession *float64 `json:"code_interpreter_cost_per_session,omitempty"`
}
PricingEntry represents a single model's pricing information. Field names and JSON tags match the datasheet schema exactly.
func (*PricingEntry) UnmarshalJSON ¶
func (p *PricingEntry) UnmarshalJSON(data []byte) error
UnmarshalJSON implements json.Unmarshaler for PricingEntry. It handles the special case where search_context_cost_per_query may arrive as either a plain float64 or a tiered object {"search_context_size_low":…, "search_context_size_medium":…, "search_context_size_high":…}.
type ProviderModelDiscoveryHealth ¶
type ProviderModelDiscoveryHealth struct {
Status ProviderModelHealthStatus `json:"status"`
LastAttemptAt *time.Time `json:"last_attempt_at,omitempty"`
LastSuccessAt *time.Time `json:"last_success_at,omitempty"`
LastErrorAt *time.Time `json:"last_error_at,omitempty"`
LastError string `json:"last_error,omitempty"`
LastModelsCount int `json:"last_models_count"`
}
type ProviderModelHealthStatus ¶
type ProviderModelHealthStatus string
const ( ProviderModelHealthUnknown ProviderModelHealthStatus = "unknown" ProviderModelHealthHealthy ProviderModelHealthStatus = "healthy" ProviderModelHealthStale ProviderModelHealthStatus = "stale" ProviderModelHealthError ProviderModelHealthStatus = "error" ProviderModelHealthDegraded ProviderModelHealthStatus = "degraded" )
type ProviderModelSnapshotHealth ¶
type ProviderModelSnapshotHealth struct {
Provider schemas.ModelProvider `json:"provider"`
Status ProviderModelHealthStatus `json:"status"`
SnapshotModelCount int `json:"snapshot_model_count"`
FilteredModelCount int `json:"filtered_model_count"`
UnfilteredModelCount int `json:"unfiltered_model_count"`
FilteredSource ProviderModelSource `json:"filtered_source"`
UnfilteredSource ProviderModelSource `json:"unfiltered_source"`
LastSnapshotUpdated *time.Time `json:"last_snapshot_updated,omitempty"`
FilteredDiscovery ProviderModelDiscoveryHealth `json:"filtered_discovery"`
UnfilteredDiscovery ProviderModelDiscoveryHealth `json:"unfiltered_discovery"`
}
type ProviderModelSnapshotHealthReport ¶
type ProviderModelSnapshotHealthReport struct {
Status ProviderModelHealthStatus `json:"status"`
GeneratedAt time.Time `json:"generated_at"`
StaleAfterSeconds int64 `json:"stale_after_seconds"`
Summary ProviderModelSnapshotHealthSummary `json:"summary"`
Providers []ProviderModelSnapshotHealth `json:"providers"`
}
type ProviderModelSnapshotHealthSummary ¶
type ProviderModelSnapshotHealthSummary struct {
TotalProviders int `json:"total_providers"`
HealthyProviders int `json:"healthy_providers"`
StaleProviders int `json:"stale_providers"`
ErrorProviders int `json:"error_providers"`
DegradedProviders int `json:"degraded_providers"`
UnknownProviders int `json:"unknown_providers"`
}
type ProviderModelSource ¶
type ProviderModelSource string
const ( ProviderModelSourceUnknown ProviderModelSource = "unknown" ProviderModelSourcePricingCatalog ProviderModelSource = "pricing_catalog" ProviderModelSourcePersistedSnapshot ProviderModelSource = "persisted_snapshot" ProviderModelSourceDefaultSeed ProviderModelSource = "default_seed" ProviderModelSourceAllowedModels ProviderModelSource = "allowed_models" ProviderModelSourceLiveDiscovery ProviderModelSource = "live_discovery" )
type ShouldSyncPricingFunc ¶
ShouldSyncPricingFunc is a function that determines if pricing data should be synced It returns a boolean indicating if syncing is needed It is completely optional and can be nil if not needed syncPricing function will be called if this function returns true