blob: c4796e24ee01a3727f43534f1463c3a6f06fc53e (
plain) (
blame)
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
|
import * as _ from 'lodash';
import { DataItem } from 'ethereum-protocol';
/*
export function generateDataItemFromSignature(signature: string): DataItem {
const dataItems = generateDataItemsFromSignature(signature);
if (dataItems.length === 1) {
return dataItems[0];
}
// signature represents a tuple
return {
name: '',
type: 'tuple',
components: dataItems
};
}*/
export function generateDataItemsFromSignature(signature: string): DataItem[] {
let trimmedSignature = signature;
if (signature.startsWith('(')) {
if (!signature.endsWith(')')) {
throw new Error(`Failed to generate data item. Must end with ')'`);
}
trimmedSignature = signature.substr(1, signature.length - 2);
}
trimmedSignature += ',';
let currTokenIsArray = false;
let currTokenArrayModifier = '';
let isParsingArrayModifier = false;
let currToken = '';
let parenCount = 0;
let currTokenName = '';
const dataItems: DataItem[] = [];
for (const char of trimmedSignature) {
// Tokenize the type string while keeping track of parentheses.
switch (char) {
case '(':
parenCount += 1;
currToken += char;
break;
case ')':
parenCount -= 1;
currToken += char;
break;
case '[':
if (parenCount === 0) {
isParsingArrayModifier = true;
currTokenIsArray = true;
currTokenArrayModifier += '[';
} else {
currToken += char;
}
break;
case ']':
if (parenCount === 0) {
isParsingArrayModifier = false;
currTokenArrayModifier += ']';
} else {
currToken += char;
}
break;
case ' ':
if (parenCount === 0) {
currTokenName = currToken;
currToken = '';
} else {
currToken += char;
}
break;
case ',':
if (parenCount === 0) {
//throw new Error(`Generating Data Items`);
const components = currToken.startsWith('(') ? generateDataItemsFromSignature(currToken) : [];
const isTuple = !_.isEmpty(components);
const isArray = currTokenIsArray;
let dataItem: DataItem = { name: currTokenName, type: '' };
if (isTuple) {
dataItem.type = 'tuple';
dataItem.components = components;
} else {
dataItem.type = currToken;
}
if (isArray) {
dataItem.type += currTokenArrayModifier;
}
dataItems.push(dataItem);
currTokenName = '';
currToken = '';
currTokenIsArray = false;
currTokenArrayModifier = '';
break;
} else {
currToken += char;
break;
}
default:
if (isParsingArrayModifier) {
currTokenArrayModifier += char;
} else {
currToken += char;
}
break;
}
}
return dataItems;
}
|
