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import { DataItem } from 'ethereum-types';
import * as ethUtil from 'ethereumjs-util';
import * as _ from 'lodash';
import { CalldataBlock, DependentCalldataBlock, RawCalldata } from '../calldata';
import * as Constants from '../constants';
import { DecodingRules } from '../utils/rules';
import { DataType } from './data_type';
import { DataTypeFactory } from './interfaces';
export abstract class DependentDataType 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): DependentCalldataBlock {
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 === undefined ? '' : parentBlock.getName();
const block = new DependentCalldataBlock(name, signature, parentName, dependencyBlock, parentBlock);
return block;
}
public generateValue(calldata: RawCalldata, rules: DecodingRules): any {
const destinationOffsetBuf = calldata.popWord();
const currentOffset = calldata.getOffset();
const destinationOffsetRelative = parseInt(ethUtil.bufferToHex(destinationOffsetBuf), Constants.HEX_BASE);
const destinationOffsetAbsolute = calldata.toAbsoluteOffset(destinationOffsetRelative);
calldata.setOffset(destinationOffsetAbsolute);
const value = this._dependency.generateValue(calldata, rules);
calldata.setOffset(currentOffset);
return value;
}
public isStatic(): boolean {
return this._isStatic;
}
}
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