134 lines
3.0 KiB
Go
134 lines
3.0 KiB
Go
package client
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import (
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"context"
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"encoding/json"
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"fmt"
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"net/http"
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"github.com/gorilla/websocket"
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)
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const (
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API_URL = "https://mempool.space/api/v1/"
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)
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type MempoolInfo struct {
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Size int `json:"size"`
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Bytes int `json:"bytes"`
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}
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type Block struct {
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Hash string `json:"hash"`
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Height int `json:"height"`
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NTx int `json:"nTx"`
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Size int `json:"size"`
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Time int `json:"time"`
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Weight int `json:"weight"`
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Fees float64 `json:"fees"`
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MinFee float64 `json:"minFee"`
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MaxFee float64 `json:"maxFee"`
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MedianFee float64 `json:"medianFee"`
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}
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type ProjectedBlock struct {
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BlockSize int `json:"blockSize"`
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BlockWeight int `json:"blockWeight"`
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NTx int `json:"nTx"`
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MinFee float64 `json:"minFee"`
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MaxFee float64 `json:"maxFee"`
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MinWeigthFee float64 `json:"minWeigthFee"`
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MaxWeigthFee float64 `json:"maxWeigthFee"`
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MedianFee float64 `json:"medianFee"`
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Fees float64 `json:"fees"`
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HasMyTx bool `json:"hasMytx"`
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}
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type Response struct {
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MempoolInfo *MempoolInfo `json:"mempoolInfo"`
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Block *Block `json:"block"`
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Blocks []Block `json:"blocks"`
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ProjectedBlocks []ProjectedBlock `json:"projectedBlocks"`
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TxPerSecond float64 `json:"txPerSecond"`
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VBytesPerSecond int `json:"vBytesPerSecond"`
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Conversions struct {
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BTC float64 `json:"BTC"`
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USD float64 `json:"USD"`
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} `json:"conversions"`
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}
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type Client struct {
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conn *websocket.Conn
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}
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func New() (*Client, error) {
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dialer := websocket.Dialer{}
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conn, _, err := dialer.Dial("wss://mempool.space/ws", nil)
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if err != nil {
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return nil, err
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}
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if err := conn.WriteMessage(websocket.TextMessage, []byte(
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`{"action":"want","data":["stats","blocks","projected-blocks"]}`,
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)); err != nil {
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return nil, err
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}
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return &Client{conn: conn}, nil
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}
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func (c *Client) Read() (*Response, error) {
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var resp Response
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if err := c.conn.ReadJSON(&resp); err != nil {
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return nil, err
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}
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return &resp, nil
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}
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type Fees []struct {
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FPV float64 `json:"fpv"`
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}
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func (f Fees) Len() int { return len(f) }
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func (f Fees) Less(i, j int) bool { return f[i].FPV < f[j].FPV }
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func (f Fees) Swap(i, j int) { f[i], f[j] = f[j], f[i] }
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func Get(ctx context.Context, path string, v interface{}) error {
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req, err := http.NewRequest("GET", API_URL+path, nil)
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if err != nil {
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return err
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}
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req = req.WithContext(ctx)
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r, err := http.DefaultClient.Do(req)
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if err != nil {
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return err
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}
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defer r.Body.Close()
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if s := r.StatusCode; s != 200 {
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return fmt.Errorf("status %d", s)
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}
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return json.NewDecoder(r.Body).Decode(v)
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}
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func GetProjectedFee(ctx context.Context, n int) (Fees, error) {
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var fees Fees
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if err := Get(ctx, fmt.Sprintf("transactions/projected/%d", n), &fees); err != nil {
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return nil, err
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}
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return fees, nil
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}
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func GetBlockFee(ctx context.Context, n int) (Fees, error) {
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var fees Fees
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if err := Get(ctx, fmt.Sprintf("transactions/height/%d", n), &fees); err != nil {
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return nil, err
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}
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return fees, nil
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}
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