Add ticketvwap and txfeeinfo RPC server commands (#145)

Two new commands were added to the daemon RPC server. They are:

ticketvwap: Calculate the volume weighted average price of tickets.
txfeeinfo: Get the transaction fee information for regular transactions
  in blocks, the mempool, and a height range

The previous "ticketfeeinfo" command logic was also refactored for
portability.

dcrjson/dcrdextcmds.go

@@ -154,13 +154,13 @@ func NewRebroadcastWinnersCmd() *RebroadcastWinnersCmd {
 
 // TicketFeeInfoCmd defines the ticketsfeeinfo JSON-RPC command.
 type TicketFeeInfoCmd struct {
-	Blocks  uint32
-	Windows uint32
+	Blocks  *uint32
+	Windows *uint32
 }
 
 // NewTicketFeeInfoCmd returns a new instance which can be used to issue a
 // JSON-RPC ticket fee info command.
-func NewTicketFeeInfoCmd(blocks uint32, windows uint32) *TicketFeeInfoCmd {
+func NewTicketFeeInfoCmd(blocks *uint32, windows *uint32) *TicketFeeInfoCmd {
 	return &TicketFeeInfoCmd{
 		Blocks:  blocks,
 		Windows: windows,
@@ -178,6 +178,38 @@ func NewTicketsForAddressCmd(addr string) *TicketsForAddressCmd {
 	return &TicketsForAddressCmd{addr}
 }
 
+// TicketVWAPCmd defines the ticketvwap JSON-RPC command.
+type TicketVWAPCmd struct {
+	Start *uint32
+	End   *uint32
+}
+
+// NewTicketVWAPCmd returns a new instance which can be used to issue a
+// JSON-RPC ticket volume weight average price command.
+func NewTicketVWAPCmd(start *uint32, end *uint32) *TicketVWAPCmd {
+	return &TicketVWAPCmd{
+		Start: start,
+		End:   end,
+	}
+}
+
+// TxFeeInfoCmd defines the ticketsfeeinfo JSON-RPC command.
+type TxFeeInfoCmd struct {
+	Blocks     *uint32
+	RangeStart *uint32
+	RangeEnd   *uint32
+}
+
+// NewTxFeeInfoCmd returns a new instance which can be used to issue a
+// JSON-RPC ticket fee info command.
+func NewTxFeeInfoCmd(blocks *uint32, start *uint32, end *uint32) *TxFeeInfoCmd {
+	return &TxFeeInfoCmd{
+		Blocks:     blocks,
+		RangeStart: start,
+		RangeEnd:   end,
+	}
+}
+
 func init() {
 	// No special flags for commands in this file.
 	flags := UsageFlag(0)
@@ -197,4 +229,6 @@ func init() {
 	MustRegisterCmd("rebroadcastwinners", (*RebroadcastWinnersCmd)(nil), flags)
 	MustRegisterCmd("ticketfeeinfo", (*TicketFeeInfoCmd)(nil), flags)
 	MustRegisterCmd("ticketsforaddress", (*TicketsForAddressCmd)(nil), flags)
+	MustRegisterCmd("ticketvwap", (*TicketVWAPCmd)(nil), flags)
+	MustRegisterCmd("txfeeinfo", (*TxFeeInfoCmd)(nil), flags)
 }

dcrjson/dcrdextresults.go

@@ -39,8 +39,9 @@ type Ticket struct {
 	Owner string `json:"owner"`
 }
 
-// TicketFeeInfoMempool is ticket fee information about the mempool.
-type TicketFeeInfoMempool struct {
+// FeeInfoBlock is ticket fee information about a block.
+type FeeInfoBlock struct {
+	Height uint32  `json:"height"`
 	Number uint32  `json:"number"`
 	Min    float64 `json:"min"`
 	Max    float64 `json:"max"`
@@ -49,9 +50,8 @@ type TicketFeeInfoMempool struct {
 	StdDev float64 `json:"stddev"`
 }
 
-// TicketFeeInfoBlock is ticket fee information about a block.
-type TicketFeeInfoBlock struct {
-	Height uint32  `json:"height"`
+// FeeInfoMempool is ticket fee information about the mempool.
+type FeeInfoMempool struct {
 	Number uint32  `json:"number"`
 	Min    float64 `json:"min"`
 	Max    float64 `json:"max"`
@@ -60,8 +60,18 @@ type TicketFeeInfoBlock struct {
 	StdDev float64 `json:"stddev"`
 }
 
-// TicketFeeInfoWindow is ticket fee information about an adjustment window.
-type TicketFeeInfoWindow struct {
+// FeeInfoRange is ticket fee information about a range.
+type FeeInfoRange struct {
+	Number uint32  `json:"number"`
+	Min    float64 `json:"min"`
+	Max    float64 `json:"max"`
+	Mean   float64 `json:"mean"`
+	Median float64 `json:"median"`
+	StdDev float64 `json:"stddev"`
+}
+
+// FeeInfoWindow is ticket fee information about an adjustment window.
+type FeeInfoWindow struct {
 	StartHeight uint32  `json:"startheight"`
 	EndHeight   uint32  `json:"endheight"`
 	Number      uint32  `json:"number"`
@@ -75,13 +85,21 @@ type TicketFeeInfoWindow struct {
 // TicketFeeInfoResult models the data returned from the ticketfeeinfo command.
 // command.
 type TicketFeeInfoResult struct {
-	FeeInfoMempool TicketFeeInfoMempool  `json:"feeinfomempool"`
-	FeeInfoBlocks  []TicketFeeInfoBlock  `json:"feeinfoblocks"`
-	FeeInfoWindows []TicketFeeInfoWindow `json:"feeinfowindows"`
+	FeeInfoMempool FeeInfoMempool  `json:"feeinfomempool"`
+	FeeInfoBlocks  []FeeInfoBlock  `json:"feeinfoblocks"`
+	FeeInfoWindows []FeeInfoWindow `json:"feeinfowindows"`
 }
 
 // TicketsForAddressResult models the data returned from the ticketforaddress
 // command.
 type TicketsForAddressResult struct {
 	Tickets []string `json:"tickets"`
 }
+
+// TxFeeInfoResult models the data returned from the ticketfeeinfo command.
+// command.
+type TxFeeInfoResult struct {
+	FeeInfoMempool FeeInfoMempool `json:"feeinfomempool"`
+	FeeInfoBlocks  []FeeInfoBlock `json:"feeinfoblocks"`
+	FeeInfoRange   FeeInfoRange   `json:"feeinforange"`
+}