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lnpay.go
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lnpay.go
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package lnpay
import (
"github.com/imroc/req"
"reflect"
"time"
)
const (
BASE_URL = "https://api.lnpay.co/v1"
TEST_KEY = "pak_O0iUMxk8kK_qUzkT4YKFvp1ZsUtp"
)
type Client struct {
header req.Header
}
// NewClient is the first function you must call. Pass your main API key here.
// It will return a client you can later use to access wallets and transactions.
// You can find it at https://lnpay.co/developers/dashboard
func NewClient(key string) *Client {
return &Client{
header: req.Header{
"X-Api-Key": key,
"Content-Type": "application/json",
"Accept": "application/json",
},
}
}
// Transaction
func (c *Client) Transaction(lntxId string) (lnTx LnTx, err error) {
resp, err := req.Get(BASE_URL+"/lntx/"+lntxId, c.header)
if err != nil {
return
}
if resp.Response().StatusCode >= 300 {
var reqErr Error
resp.ToJSON(&reqErr)
err = reqErr
return
}
err = resp.ToJSON(&lnTx)
return
}
// CreateWallet creates a new wallet with a given descriptive label.
// It will return the wallet object which you can use to create invoices and payments.
// https://docs.lnpay.co/wallet/create-wallet
func (c *Client) CreateWallet(label string) (wal Wallet, err error) {
resp, err := req.Post(BASE_URL+"/wallet", c.header, req.BodyJSON(struct {
UserLabel string `json:"user_label"`
}{label}))
if err != nil {
return
}
if resp.Response().StatusCode >= 300 {
var reqErr Error
resp.ToJSON(&reqErr)
err = reqErr
return
}
err = resp.ToJSON(&wal)
return
}
// Wallet returns a wallet that was already created.
// Pass the wallet key you got when creating it.
// I can be either the admin, invoice or read-only key.
func (c *Client) Wallet(key string) *Wallet {
return &Wallet{
c,
key,
BASE_URL + "/wallet/" + key,
}
}
type Wallet struct {
*Client
Key string
BASE_URL string
}
// Details returns basic information about a wallet, such as its id, label or balance.
// https://docs.lnpay.co/wallet/get-balance
func (w *Wallet) Details() (wal Wal, err error) {
resp, err := req.Get(w.BASE_URL, w.header)
if err != nil {
return
}
if resp.Response().StatusCode >= 300 {
var reqErr Error
resp.ToJSON(&reqErr)
err = reqErr
return
}
err = resp.ToJSON(&wal)
return
}
// Transactions returns a list of the transactions associated with the wallet.
// https://docs.lnpay.co/wallet/get-transactions
func (w *Wallet) Transactions() (txs []Wtx, err error) {
resp, err := req.Get(w.BASE_URL+"/transactions", w.header)
if err != nil {
return
}
if resp.Response().StatusCode >= 300 {
var reqErr Error
resp.ToJSON(&reqErr)
err = reqErr
return
}
err = resp.ToJSON(&txs)
return
}
type InvoiceParams struct {
Memo string `json:"memo"` // the invoice description.
NumSatoshis int64 `json:"num_satoshis"` // the invoice amount.
Expiry int64 `json:"expiry"` // seconds, default 86400 (1 day).
// custom data you may want to associate with this invoice. optional.
PassThru map[string]interface{} `json:"passThru"`
// base64-encoded. If this is provided, memo will be ignored.
// don't use this if you don't know what it means.
DescriptionHash string `json:"description_hash"`
}
// Invoice creates an invoice associated with this wallet.
// https://docs.lnpay.co/wallet/generate-invoice
func (w *Wallet) Invoice(params InvoiceParams) (lntx LnTx, err error) {
resp, err := req.Post(w.BASE_URL+"/invoice", w.header, req.BodyJSON(¶ms))
if err != nil {
return
}
if resp.Response().StatusCode >= 300 {
var reqErr Error
resp.ToJSON(&reqErr)
err = reqErr
return
}
err = resp.ToJSON(&lntx)
return
}
type PayParams struct {
// the BOLT11 payment request you want to pay.
PaymentRequest string `json:"payment_request"`
// custom data you may want to associate with this invoice. optional.
PassThru map[string]interface{} `json:"passThru"`
}
// Pay pays a given invoice with funds from the wallet.
// https://docs.lnpay.co/wallet/pay-invoice
func (w *Wallet) Pay(params PayParams) (wtx Wtx, err error) {
resp, err := req.Post(w.BASE_URL+"/withdraw", w.header, req.BodyJSON(¶ms))
if err != nil {
return
}
if resp.Response().StatusCode >= 300 {
var reqErr Error
resp.ToJSON(&reqErr)
err = reqErr
return
}
err = resp.ToJSON(&wtx)
return
}
type TransferParams struct {
Memo string `json:"memo"` // the transfer description.
NumSatoshis int64 `json:"num_satoshis"` // the transfer amount.
DestWalletId string `json:"dest_wallet_id"` // the key or id of the destination
}
// Transfer transfers between two lnpay.co wallets.
// https://docs.lnpay.co/wallet/transfers-between-wallets
func (w *Wallet) Transfer(params TransferParams) (wtx Wtx, err error) {
resp, err := req.Post(w.BASE_URL+"/transfer", w.header, req.BodyJSON(¶ms))
if err != nil {
return
}
if resp.Response().StatusCode >= 300 {
var reqErr Error
resp.ToJSON(&reqErr)
err = reqErr
return
}
err = resp.ToJSON(&wtx)
return
}
// Update the receiver transaction using lntx api.
// It will compare the receiver tx with the updated tx and replace the receiver,
// if any changes are detected.
func (tx *LnTx) Update(client *Client) (updated bool, err error) {
lntx, err := client.Transaction(tx.ID)
if err != nil {
return false, err
}
if !tx.eq(lntx) {
*tx = lntx
return true, nil
}
return false, nil
}
// Expired checks if lntx is expired
func (tx *LnTx) Expired() bool {
if tx.ExpiresAt < int(time.Now().Unix()) {
return true
}
return false
}
// IsSettled checks if receiver lntx is settled yet.
// It will only update the tx if currently not settled.
func (tx *LnTx) IsSettled(client *Client) bool {
if tx.Settled == 0 {
updated, err := tx.Update(client)
if err != nil {
return false
}
if updated {
// check if updated transaction settled
if tx.Settled == 1 {
return true
}
}
}
return false
}
// eq will compare the receiver transaction with another transaction
func (tx *LnTx) eq(lntx LnTx) (updated bool) {
return reflect.DeepEqual(tx, &lntx)
}