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/* tslint:disable prefer-function-over-method */
import { DataItem } from 'ethereum-types';
import * as ethUtil from 'ethereumjs-util';
import * as _ from 'lodash';
import { BigNumber } from '../../configured_bignumber';
import { AbstractDataTypes, DataTypeFactory } from '../abstract_data_types';
import { RawCalldata } from '../calldata';
import * as Constants from '../utils/constants';
export class Bool extends AbstractDataTypes.Blob {
private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
public static matchType(type: string): boolean {
return type === 'bool';
}
public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
super(dataItem, dataTypeFactory, Bool._SIZE_KNOWN_AT_COMPILE_TIME);
if (!Bool.matchType(dataItem.type)) {
throw new Error(`Tried to instantiate Bool with bad input: ${dataItem}`);
}
}
public encodeValue(value: boolean): Buffer {
const encodedValue = value ? '0x1' : '0x0';
const encodedValueBuf = ethUtil.setLengthLeft(
ethUtil.toBuffer(encodedValue),
Constants.EVM_WORD_WIDTH_IN_BYTES,
);
return encodedValueBuf;
}
public decodeValue(calldata: RawCalldata): boolean {
const valueBuf = calldata.popWord();
const valueHex = ethUtil.bufferToHex(valueBuf);
const valueNumber = new BigNumber(valueHex, Constants.HEX_BASE);
if (!(valueNumber.equals(0) || valueNumber.equals(1))) {
throw new Error(`Failed to decode boolean. Expected 0x0 or 0x1, got ${valueHex}`);
}
/* tslint:disable boolean-naming */
const value: boolean = valueNumber.equals(0) ? false : true;
/* tslint:enable boolean-naming */
return value;
}
public getSignature(): string {
return 'bool';
}
}
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