1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package util
import (
"database/sql"
"encoding/json"
"errors"
"fmt"
"os"
"strings"
// import postgres driver
_ "github.com/lib/pq"
)
// ErrorNotInitialized is returned when the database is not initialized.
var ErrorNotInitialized error = errors.New("database not initialized")
// MaybeFail exits if there was an error.
func MaybeFail(err error, errfmt string, params ...interface{}) {
if err == nil {
return
}
fmt.Fprintf(os.Stderr, errfmt, params...)
fmt.Fprintf(os.Stderr, "\nError: %v\n", err)
os.Exit(1)
}
// GetNextRound returns the next account round from the metastate table.
func GetNextRound(postgresConnectionString string) (uint64, error) {
conn, err := sql.Open("postgres", postgresConnectionString)
if err != nil {
return 0, fmt.Errorf("postgres connection string did not work: %w", err)
}
defer conn.Close()
query := `SELECT v FROM metastate WHERE k='state';`
var state []uint8
if err = conn.QueryRow(query).Scan(&state); err != nil {
if strings.Contains(err.Error(), `relation "metastate" does not exist`) {
return 0, ErrorNotInitialized
}
return 0, fmt.Errorf("unable to get next db round: %w", err)
}
kv := make(map[string]uint64)
err = json.Unmarshal(state, &kv)
if err != nil {
return 0, fmt.Errorf("unable to get next account round: %w", err)
}
return kv["next_account_round"], nil
}
// EmptyDB empties the database.
func EmptyDB(postgresConnectionString string) error {
conn, err := sql.Open("postgres", postgresConnectionString)
if err != nil {
return fmt.Errorf("postgres connection string did not work: %w", err)
}
defer conn.Close()
query := `DROP SCHEMA IF EXISTS public CASCADE; CREATE SCHEMA public;`
if _, err = conn.Exec(query); err != nil {
return fmt.Errorf("unable to reset postgres DB: %w", err)
}
return nil
}
|
