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
|
import { DataItem } from 'ethereum-types';
import * as ethUtil from 'ethereumjs-util';
import * as _ from 'lodash';
import { CalldataBlock, CalldataBlocks, RawCalldata } from '../../calldata';
import * as Constants from '../../utils/constants';
import { DecodingRules } from '../../utils/rules';
import { DataType } from '../data_type';
import { DataTypeFactory } from '../interfaces';
export abstract class Pointer extends DataType {
protected _dependency: DataType;
protected _parent: DataType;
private readonly _isStatic: boolean;
public constructor(dataItem: DataItem, factory: DataTypeFactory, dependency: DataType, parent: DataType) {
super(dataItem, factory);
this._dependency = dependency;
this._parent = parent;
this._isStatic = true;
}
public generateCalldataBlock(value: any, parentBlock?: CalldataBlock): CalldataBlocks.Pointer {
if (parentBlock === undefined) {
throw new Error(`DependentDataType requires a parent block to generate its block`);
}
const dependencyBlock = this._dependency.generateCalldataBlock(value, parentBlock);
const name = this.getDataItem().name;
const signature = this.getSignature();
const parentName = parentBlock ? parentBlock.getName() : '';
const block = new CalldataBlocks.Pointer(name, signature, parentName, dependencyBlock, parentBlock);
return block;
}
public generateValue(calldata: RawCalldata, rules: DecodingRules): any {
const destinationOffsetBuf = calldata.popWord();
const destinationOffsetHex = ethUtil.bufferToHex(destinationOffsetBuf);
const destinationOffsetRelative = parseInt(destinationOffsetHex, Constants.HEX_BASE);
const destinationOffsetAbsolute = calldata.toAbsoluteOffset(destinationOffsetRelative);
const currentOffset = calldata.getOffset();
calldata.setOffset(destinationOffsetAbsolute);
const value = this._dependency.generateValue(calldata, rules);
calldata.setOffset(currentOffset);
return value;
}
public isStatic(): boolean {
return this._isStatic;
}
}
|
