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Merge pull request #15 from boltcard/ln-addr

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Ln addr
This commit is contained in:
Peter Rounce 2022-09-25 20:17:39 +01:00 • committed by GitHub
commit 53a02eddd3
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 222 additions and 29 deletions
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1
create_db.sql
View file

@ -25,6 +25,7 @@ CREATE TABLE cards (
one_time_code CHAR(32) NOT NULL DEFAULT '',
one_time_code_expiry TIMESTAMPTZ DEFAULT NOW() + INTERVAL '1 DAY',
one_time_code_used CHAR(1) NOT NULL DEFAULT 'Y',
allow_negative_balance CHAR(1) NOT NULL DEFAULT 'N',
PRIMARY KEY(card_id)
);

139
database.go
View file

@ -8,7 +8,7 @@ import (
"os"
)
type Card struct {
type card struct {
card_id int
card_guid string
k0_auth_key string
@ -22,11 +22,12 @@ type Card struct {
lnurlw_enable string
tx_limit_sats int
day_limit_sats int
lnurlp_enable string
email_address string
email_enable string
lnurlp_enable string
email_address string
email_enable string
one_time_code string
card_name string
allow_negative_balance string
}
type payment struct {
@ -36,6 +37,14 @@ type payment struct {
paid_flag string
}
type transaction struct {
card_id int
tx_id int
tx_type string
tx_amount_msats int
tx_time string
}
func db_open() (*sql.DB, error) {
// get connection string from environment variables
@ -55,9 +64,9 @@ func db_open() (*sql.DB, error) {
return db, nil
}
func db_get_new_card(one_time_code string) (*Card, error) {
func db_get_new_card(one_time_code string) (*card, error) {
c := Card{}
c := card{}
db, err := db_open()
if err != nil {
@ -191,7 +200,7 @@ func db_get_card_id_for_r_hash(r_hash string) (int, error) {
return card_id, nil
}
func db_get_cards_blank_uid() ([]Card, error) {
func db_get_cards_blank_uid() ([]card, error) {
// open the database
@ -217,17 +226,17 @@ func db_get_cards_blank_uid() ([]Card, error) {
// prepare the results
var cards []Card
var cards []card
// Loop through rows, using Scan to assign column data to struct fields.
for rows.Next() {
var card Card
err := rows.Scan(&card.card_id, &card.k2_cmac_key)
var c card
err := rows.Scan(&c.card_id, &c.k2_cmac_key)
if err != nil {
return cards, err
}
cards = append(cards, card)
cards = append(cards, c)
}
err = rows.Err()
@ -262,9 +271,9 @@ func db_update_card_uid_ctr(card_id int, uid string, ctr uint32) error {
return nil
}
func db_get_card_from_uid(card_uid string) (*Card, error) {
func db_get_card_from_uid(card_uid string) (*card, error) {
c := Card{}
c := card{}
db, err := db_open()
if err != nil {
@ -293,9 +302,9 @@ func db_get_card_from_uid(card_uid string) (*Card, error) {
return &c, nil
}
func db_get_card_from_card_id(card_id int) (*Card, error) {
func db_get_card_from_card_id(card_id int) (*card, error) {
c := Card{}
c := card{}
db, err := db_open()
if err != nil {
@ -303,10 +312,11 @@ func db_get_card_from_card_id(card_id int) (*Card, error) {
}
defer db.Close()
sqlStatement := `SELECT card_id, k2_cmac_key, uid,` +
` last_counter_value, lnurlw_request_timeout_sec,` +
` lnurlw_enable, tx_limit_sats, day_limit_sats, email_enable, email_address` +
` FROM cards WHERE card_id=$1;`
sqlStatement := `SELECT card_id, k2_cmac_key, uid, ` +
`last_counter_value, lnurlw_request_timeout_sec, ` +
`lnurlw_enable, tx_limit_sats, day_limit_sats, ` +
`email_enable, email_address, card_name, ` +
`allow_negative_balance FROM cards WHERE card_id=$1;`
row := db.QueryRow(sqlStatement, card_id)
err = row.Scan(
&c.card_id,
@ -318,7 +328,9 @@ func db_get_card_from_card_id(card_id int) (*Card, error) {
&c.tx_limit_sats,
&c.day_limit_sats,
&c.email_enable,
&c.email_address)
&c.email_address,
&c.card_name,
&c.allow_negative_balance)
if err != nil {
return &c, err
}
@ -584,3 +596,90 @@ func db_get_card_totals(card_id int) (int, error) {
return day_total_sats, nil
}
func db_get_card_txs(card_id int, max_txs int) ([]transaction, error) {
// open the database
db, err := db_open()
if err != nil {
return nil, err
}
defer db.Close()
// query the database
sqlStatement := `SELECT card_id, ` +
`card_payments.card_payment_id AS tx_id, 'payment' AS tx_type, ` +
`amount_msats as tx_amount_msats, ` +
`TO_CHAR(payment_status_time, 'DD/MM/YYYY HH:MI:SS') AS tx_time ` +
`FROM card_payments WHERE card_id = $1 AND payment_status != 'FAILED' ` +
`AND payment_status != '' ` +
`AND amount_msats != 0 UNION SELECT card_id, card_receipts.card_receipt_id AS tx_id, ` +
`'receipt' AS tx_type, amount_msats as tx_amount_msats, ` +
`TO_CHAR(receipt_status_time, 'DD/MM/YYYY HH:MI:SS') AS tx_time ` +
`FROM card_receipts WHERE card_id = $1 ` +
`AND receipt_status = 'SETTLED' ORDER BY tx_time DESC LIMIT $2`
rows, err := db.Query(sqlStatement, card_id, max_txs)
if err != nil {
return nil, err
}
defer rows.Close()
// prepare the results
var transactions []transaction
// Loop through rows, using Scan to assign column data to struct fields.
for rows.Next() {
var t transaction
err := rows.Scan(&t.card_id, &t.tx_id, &t.tx_type, &t.tx_amount_msats, &t.tx_time)
if err != nil {
return transactions, err
}
transactions = append(transactions, t)
}
err = rows.Err()
if err != nil {
return transactions, err
}
return transactions, nil
}
func db_get_card_total_sats(card_id int) (int, error) {
db, err := db_open()
if err != nil {
return 0, err
}
card_total_msats := 0
sqlStatement := `SELECT SUM(tx_amount_msats) FROM (SELECT card_id, ` +
`card_payments.card_payment_id AS tx_id, 'payment' AS tx_type, ` +
`-amount_msats as tx_amount_msats, payment_status_time AS tx_time ` +
`FROM card_payments WHERE card_id = $1 AND payment_status != 'FAILED' ` +
`AND payment_status != '' ` +
`AND amount_msats != 0 UNION SELECT card_id, card_receipts.card_receipt_id AS tx_id, ` +
`'receipt' AS tx_type, amount_msats as tx_amount_msats, ` +
`receipt_status_time AS tx_time FROM card_receipts WHERE card_id = $1 ` +
`AND receipt_status = 'SETTLED' ORDER BY tx_time) AS transactions;`
row := db.QueryRow(sqlStatement, card_id)
err = row.Scan(&card_total_msats)
if err != nil {
return 0, err
}
card_total_sats := card_total_msats / 1000
return card_total_sats, nil
}

75
email.go
View file

@ -8,8 +8,83 @@ import (
"github.com/aws/aws-sdk-go/service/ses"
log "github.com/sirupsen/logrus"
"os"
"strconv"
"strings"
)
func send_balance_email(recipient_email string, card_id int) {
c, err := db_get_card_from_card_id(card_id)
if err != nil {
log.Warn(err.Error())
return
}
card_total_sats, err := db_get_card_total_sats(card_id)
if err != nil {
log.Warn(err.Error())
return
}
email_max_txs, err := strconv.Atoi(os.Getenv("EMAIL_MAX_TXS"))
if err != nil {
log.Warn(err.Error())
return
}
txs, err := db_get_card_txs(card_id, email_max_txs+1)
if err != nil {
log.Warn(err.Error())
return
}
subject := c.card_name + " balance = " + strconv.Itoa(card_total_sats) + " sats"
// add transactions to the email body
var html_body_sb strings.Builder
var text_body_sb strings.Builder
html_body_sb.WriteString("<!DOCTYPE html><html><head><style> table, " +
"th, td { border: 1px solid black; border-collapse: collapse; } " +
"</style></head><body>")
html_body_sb.WriteString("<h3>transactions</h3><table><tr><th>date</th><th>action</th><th>amount</th>")
text_body_sb.WriteString("transactions\n\n")
for i, tx := range txs {
if i < email_max_txs {
html_body_sb.WriteString(
"<tr>" +
"<td>" + tx.tx_time + "</td>" +
"<td>" + tx.tx_type + "</td>" +
"<td style='text-align:right'>" + strconv.Itoa(tx.tx_amount_msats/1000) + "</td>" +
"</tr>")
} else {
html_body_sb.WriteString(
"<tr>" +
"<td style='text-align:center'> ... </td>" +
"<td style='text-align:center'> ... </td>" +
"<td style='text-align:center'> ... </td>" +
"</tr>")
}
text_body_sb.WriteString(tx.tx_type +
" " + strconv.Itoa(tx.tx_amount_msats/1000))
}
html_body_sb.WriteString("</table></body></html>")
html_body := html_body_sb.String()
text_body := text_body_sb.String()
send_email(recipient_email,
subject,
html_body,
text_body)
}
// https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/ses-example-send-email.html
func send_email(recipient string, subject string, htmlBody string, textBody string) {

4
lightning.go
View file

@ -182,7 +182,7 @@ func monitor_invoice_state(r_hash []byte) () {
return
}
go send_email(c.email_address, "bolt card receipt", "html body", "text body")
go send_balance_email(c.email_address, card_id)
return
}
@ -278,7 +278,7 @@ func pay_invoice(card_payment_id int, invoice string) {
return
}
go send_email(c.email_address, "bolt card payment", "html body", "text body")
go send_balance_email(c.email_address, card_id)
return
}

32
lnurlw_callback.go
View file

@ -9,12 +9,12 @@ import (
func lnurlw_callback(w http.ResponseWriter, req *http.Request) {
env_host_domain := os.Getenv("HOST_DOMAIN")
if req.Host != env_host_domain {
log.Warn("wrong host domain")
write_error(w)
return
}
env_host_domain := os.Getenv("HOST_DOMAIN")
if req.Host != env_host_domain {
log.Warn("wrong host domain")
write_error(w)
return
}
url := req.URL.RequestURI()
log.WithFields(log.Fields{"url": url}).Debug("cb request")
@ -120,6 +120,24 @@ func lnurlw_callback(w http.ResponseWriter, req *http.Request) {
return
}
// check the card balance if marked as 'must stay above zero' (default)
// i.e. cards.allow_negative_balance == 'N'
if c.allow_negative_balance != "Y" {
card_total, err := db_get_card_total_sats(p.card_id)
if err != nil {
log.WithFields(log.Fields{"card_payment_id": p.card_payment_id}).Warn(err)
write_error(w)
return
}
if card_total-invoice_sats < 0 {
log.WithFields(log.Fields{"card_payment_id": p.card_payment_id}).Warn("not enough balance")
write_error(w)
return
}
}
log.WithFields(log.Fields{"card_payment_id": p.card_payment_id}).Info("paying invoice")
// update paid_flag so we only attempt payment once
@ -138,7 +156,7 @@ func lnurlw_callback(w http.ResponseWriter, req *http.Request) {
go pay_invoice(p.card_payment_id, param_pr)
log.Debug("sending 'status OK' response");
log.Debug("sending 'status OK' response")
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)