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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
/*
This file is part of GNU Taler
(C) 2019-2020 Taler Systems SA
GNU Taler is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GNU Taler 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* Classes and helpers for error handling specific to wallet operations.
*
* @author Florian Dold <dold@taler.net>
*/
/**
* Imports.
*/
import { OperationErrorDetails } from "../types/walletTypes";
import { TalerErrorCode } from "../TalerErrorCode";
/**
* This exception is there to let the caller know that an error happened,
* but the error has already been reported by writing it to the database.
*/
export class OperationFailedAndReportedError extends Error {
constructor(public operationError: OperationErrorDetails) {
super(operationError.message);
// Set the prototype explicitly.
Object.setPrototypeOf(this, OperationFailedAndReportedError.prototype);
}
}
/**
* This exception is thrown when an error occured and the caller is
* responsible for recording the failure in the database.
*/
export class OperationFailedError extends Error {
static fromCode(
ec: TalerErrorCode,
message: string,
details: Record<string, unknown>,
): OperationFailedError {
return new OperationFailedError(makeErrorDetails(ec, message, details));
}
constructor(public operationError: OperationErrorDetails) {
super(operationError.message);
// Set the prototype explicitly.
Object.setPrototypeOf(this, OperationFailedError.prototype);
}
}
export function makeErrorDetails(
ec: TalerErrorCode,
message: string,
details: Record<string, unknown>,
): OperationErrorDetails {
return {
talerErrorCode: ec,
talerErrorHint: `Error: ${TalerErrorCode[ec]}`,
details: details,
message,
};
}
/**
* Run an operation and call the onOpError callback
* when there was an exception or operation error that must be reported.
* The cause will be re-thrown to the caller.
*/
export async function guardOperationException<T>(
op: () => Promise<T>,
onOpError: (e: OperationErrorDetails) => Promise<void>,
): Promise<T> {
try {
return await op();
} catch (e) {
if (e instanceof OperationFailedAndReportedError) {
throw e;
}
if (e instanceof OperationFailedError) {
await onOpError(e.operationError);
throw new OperationFailedAndReportedError(e.operationError);
}
if (e instanceof Error) {
const opErr = makeErrorDetails(
TalerErrorCode.WALLET_UNEXPECTED_EXCEPTION,
`unexpected exception (message: ${e.message})`,
{},
);
await onOpError(opErr);
throw new OperationFailedAndReportedError(opErr);
}
// Something was thrown that is not even an exception!
// Try to stringify it.
let excString: string;
try {
excString = e.toString();
} catch (e) {
// Something went horribly wrong.
excString = "can't stringify exception";
}
const opErr = makeErrorDetails(
TalerErrorCode.WALLET_UNEXPECTED_EXCEPTION,
`unexpected exception (not an exception, ${excString})`,
{},
);
await onOpError(opErr);
throw new OperationFailedAndReportedError(opErr);
}
}
|
