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client.go
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client.go
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// Copyright (C) 2022 Storj Labs, Inc.
// See LICENSE for copying information.
package storjscan
import (
"context"
"encoding/json"
"math/big"
"net/http"
"strconv"
"time"
"github.com/zeebo/errs"
"storj.io/storj/private/blockchain"
)
var (
// ClientErr is general purpose storjscan client error class.
ClientErr = errs.Class("storjscan client")
// ClientErrUnauthorized is unauthorized err storjscan client error class.
ClientErrUnauthorized = errs.Class("storjscan client unauthorized")
)
// Header holds ethereum blockchain block header data.
type Header struct {
Hash blockchain.Hash
Number int64
Timestamp time.Time
}
// Payment holds storjscan payment data.
type Payment struct {
From blockchain.Address
To blockchain.Address
TokenValue *big.Int
BlockHash blockchain.Hash
BlockNumber int64
Transaction blockchain.Hash
LogIndex int
Timestamp time.Time
}
// LatestPayments contains latest payments and latest chain block header.
type LatestPayments struct {
LatestBlock Header
Payments []Payment
}
// Client is storjscan HTTP API client.
type Client struct {
endpoint string
identifier string
secret string
http http.Client
}
// NewClient creates new storjscan API client.
func NewClient(endpoint, identifier, secret string) *Client {
return &Client{
endpoint: endpoint,
identifier: identifier,
secret: secret,
http: http.Client{},
}
}
// Payments retrieves all payments after specified block for wallets associated with particular API key.
func (client *Client) Payments(ctx context.Context, from int64) (_ LatestPayments, err error) {
defer mon.Task()(&ctx)(&err)
p := client.endpoint + "/api/v0/tokens/payments"
req, err := http.NewRequestWithContext(ctx, http.MethodGet, p, nil)
if err != nil {
return LatestPayments{}, ClientErr.Wrap(err)
}
req.SetBasicAuth(client.identifier, client.secret)
query := req.URL.Query()
query.Set("from", strconv.FormatInt(from, 10))
req.URL.RawQuery = query.Encode()
resp, err := client.http.Do(req)
if err != nil {
return LatestPayments{}, ClientErr.Wrap(err)
}
defer func() {
err = errs.Combine(err, ClientErr.Wrap(resp.Body.Close()))
}()
if resp.StatusCode != http.StatusOK {
var data struct {
Error string `json:"error"`
}
if err := json.NewDecoder(resp.Body).Decode(&data); err != nil {
return LatestPayments{}, ClientErr.Wrap(err)
}
switch resp.StatusCode {
case http.StatusUnauthorized:
return LatestPayments{}, ClientErrUnauthorized.New("%s", data.Error)
default:
return LatestPayments{}, ClientErr.New("%s", data.Error)
}
}
var payments LatestPayments
if err := json.NewDecoder(resp.Body).Decode(&payments); err != nil {
return LatestPayments{}, ClientErr.Wrap(err)
}
return payments, nil
}