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import { DataItem, SolidityTypes } from 'ethereum-types';
import * as ethUtil from 'ethereumjs-util';
import * as _ from 'lodash';
import { BigNumber } from '../../configured_bignumber';
import { DataTypeFactory } from '../abstract_data_types/interfaces';
import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
import { RawCalldata } from '../calldata';
import { constants } from '../utils/constants';
export class BoolDataType extends AbstractBlobDataType {
private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
public static matchType(type: string): boolean {
return type === SolidityTypes.Bool;
}
public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
super(dataItem, dataTypeFactory, BoolDataType._SIZE_KNOWN_AT_COMPILE_TIME);
if (!BoolDataType.matchType(dataItem.type)) {
throw new Error(`Tried to instantiate Bool with bad input: ${dataItem}`);
}
}
// Disable prefer-function-over-method for inherited abstract methods.
/* tslint:disable prefer-function-over-method */
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);
/* tslint:enable boolean-naming */
return value;
}
public getSignature(): string {
return SolidityTypes.Bool;
}
/* tslint:enable prefer-function-over-method */
}
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