Add the get option contract endpoints

alpaca/entities.go

@@ -388,3 +388,89 @@ type closeAllPositionsResponse struct {
 	Status int             `json:"status"`
 	Body   json.RawMessage `json:"body,omitempty"`
 }
+
+type OptionStatus string
+
+const (
+	OptionStatusActive   OptionStatus = "active"
+	OptionStatusInactive OptionStatus = "inactive"
+)
+
+type OptionType string
+
+const (
+	OptionTypeCall OptionType = "call"
+	OptionTypePut  OptionType = "put"
+)
+
+type OptionStyle string
+
+const (
+	OptionStyleAmerican OptionStyle = "american"
+	OptionStyleEuropean OptionStyle = "european"
+)
+
+type DeliverableType string
+
+const (
+	DeliverableTypeCash   DeliverableType = "cash"
+	DeliverableTypeEquity DeliverableType = "equity"
+)
+
+type DeliverableSettlementType string
+
+const (
+	DeliverableSettlementTypeT0 DeliverableSettlementType = "T+0"
+	DeliverableSettlementTypeT1 DeliverableSettlementType = "T+1"
+	DeliverableSettlementTypeT2 DeliverableSettlementType = "T+2"
+	DeliverableSettlementTypeT3 DeliverableSettlementType = "T+3"
+	DeliverableSettlementTypeT4 DeliverableSettlementType = "T+4"
+	DeliverableSettlementTypeT5 DeliverableSettlementType = "T+5"
+)
+
+type DeliverableSettlementMethod string
+
+const (
+	DeliverableSettlementMethodBTOB DeliverableSettlementMethod = "BTOB"
+	DeliverableSettlementMethodCADF DeliverableSettlementMethod = "CADF"
+	DeliverableSettlementMethodCAFX DeliverableSettlementMethod = "CAFX"
+	DeliverableSettlementMethodCCC  DeliverableSettlementMethod = "CCC"
+)
+
+type OptionDeliverable struct {
+	Type                 DeliverableType             `json:"type"`
+	Symbol               string                      `json:"symbol"`
+	AssetID              *string                     `json:"asset_id,omitempty"`
+	Amount               decimal.Decimal             `json:"amount"`
+	AllocationPercentage decimal.Decimal             `json:"allocation_percentage"`
+	SettlementType       DeliverableSettlementType   `json:"settlement_type"`
+	SettlementMethod     DeliverableSettlementMethod `json:"settlement_method"`
+	DelayedSettlement    bool                        `json:"delayed_settlement"`
+}
+
+type OptionContract struct {
+	ID                string              `json:"id"`
+	Symbol            string              `json:"symbol"`
+	Name              string              `json:"name"`
+	Status            OptionStatus        `json:"status"`
+	Tradable          bool                `json:"tradable"`
+	ExpirationDate    civil.Date          `json:"expiration_date"`
+	RootSymbol        *string             `json:"root_symbol,omitempty"`
+	UnderlyingSymbol  string              `json:"underlying_symbol"`
+	UnderlyingAssetID string              `json:"underlying_asset_id"`
+	Type              OptionType          `json:"type"`
+	Style             OptionStyle         `json:"style"`
+	StrikePrice       decimal.Decimal     `json:"strike_price"`
+	Multiplier        decimal.Decimal     `json:"multiplier"`
+	Size              decimal.Decimal     `json:"size"`
+	OpenInterest      *decimal.Decimal    `json:"open_interest"`
+	OpenInterestDate  *civil.Date         `json:"open_interest_date,omitempty"`
+	ClosePrice        *decimal.Decimal    `json:"close_price,omitempty"`
+	ClosePriceDate    *civil.Date         `json:"close_price_date,omitempty"`
+	Deliverables      []OptionDeliverable `json:"deliverables,omitempty"`
+}
+
+type optionContractsResponse struct {
+	OptionContracts []OptionContract `json:"option_contracts"`
+	NextPageToken   *string          `json:"next_page_token,omitempty"`
+}