Go SDK

1package main
2
3import (
4    "bytes"
5    "encoding/json"
6    "fmt"
7    "net/http"
8    "io"
9)
10
11const api = "https://buff.finance"
12const apiKey = "YOUR_API_KEY"
13
14func buffPost(path string, body map[string]interface{}) map[string]interface{} {
15    data, _ := json.Marshal(body)
16    req, _ := http.NewRequest("POST", api+path, bytes.NewBuffer(data))
17    req.Header.Set("Content-Type", "application/json")
18    req.Header.Set("x-api-key", apiKey)
19    resp, _ := http.DefaultClient.Do(req)
20    defer resp.Body.Close()
21    raw, _ := io.ReadAll(resp.Body)
22    var result map[string]interface{}
23    json.Unmarshal(raw, &result)
24    return result["data"].(map[string]interface{})
25}
26
27func main() {
28    // Calculate round-up
29    data := buffPost("/api/roundup", map[string]interface{}{
30        "txValueUsd": 27.63,
31        "plan":       "sprout",
32    })
33    fmt.Printf("Round-up: $%v\n", data["roundUpUsd"]) // $0.07
34
35    // Get wrap instructions (server builds transfers with fees)
36    wrap := buffPost("/api/wrap", map[string]interface{}{
37        "txValueUsd":      27.63,
38        "userPubkey":      "YOUR_PUBKEY",
39        "buffWalletPubkey": "BUFF_WALLET",
40        "plan":            "sprout",
41    })
42    breakdown := wrap["breakdown"].(map[string]interface{})
43    fmt.Printf("Fee: %v lamports\n", breakdown["buffFeeLamports"])
44
45    // Build swap
46    swap := buffPost("/api/swap/build", map[string]interface{}{
47        "buffWalletPubkey": "BUFF_WALLET",
48        "targetAsset":      "BTC",
49        "threshold":        5,
50    })
51    fmt.Printf("Ready: %v\n", swap["ready"])
52}