-
Notifications
You must be signed in to change notification settings - Fork 37
/
scArgumentsParser.ts
78 lines (66 loc) · 2.58 KB
/
scArgumentsParser.ts
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
import {ErrInvalidScCallDataField} from "./errors";
/**
* Class with static methods useful for fetching and checking arguments from a transaction's data field that should trigger
* a smart contract call
*/
export class ScArgumentsParser {
private static validHexChars = ["a", "b", "c", "d", "e", "f", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9"];
/**
* Returns an array containing all the arguments from a data field representing a smart contract call
* @param dataField this field represents the data filed to extract arguments from
* @return {functionName, args} returns the function name and an array containing all the smart contract call arguments
* @throws ErrInvalidScCallDataField the function returns an ErrInvalidScCallDataField exception if the input isn't a smart contract call valid input
*/
public static parseSmartContractCallDataField(dataField: string): { functionName: string, args: Array<string> } {
if (!this.isValidSmartContractCallDataField(dataField)) {
throw new ErrInvalidScCallDataField(dataField);
}
let args = new Array<string>();
let items = dataField.split("@");
if (items.length === 0) {
return {
functionName: dataField,
args: new Array<string>(),
};
}
for (let i = 1; i < items.length; i++) {
args.push(items[i]);
}
return {
functionName: items[0],
args: args,
};
}
/**
* Returns a Boolean value representing if the input data field is a valid smart contract call input
* @param dataField this field represents the input to check
*/
public static isValidSmartContractCallDataField(dataField: string): Boolean {
let items = dataField.split("@");
if (items.length === 0) {
return true; // only function call, no arguments
}
for (let i = 1; i < items.length; i++) {
if (!this.isValidScArgument(items[i])) {
return false;
}
}
return true;
}
/**
*
* @param input input represents the input argument to check
* @return true if the provided argument resembles a valid smart contract call argument
*/
public static isValidScArgument(input: string): Boolean {
if (input.length % 2 != 0) {
return false;
}
for (let i = 0; i < input.length; i++) {
if (!this.validHexChars.includes(input[i])) {
return false;
}
}
return true;
}
}