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import { DataItem, SolidityTypes } from 'ethereum-types';
import * as ethUtil from 'ethereumjs-util';
import * as _ from 'lodash';
import { DataTypeFactory } from '../abstract_data_types/interfaces';
import { AbstractBlobDataType } from '../abstract_data_types/types/blob';
import { RawCalldata } from '../calldata/raw_calldata';
import { constants } from '../utils/constants';
export class AddressDataType extends AbstractBlobDataType {
private static readonly _SIZE_KNOWN_AT_COMPILE_TIME: boolean = true;
private static readonly _ADDRESS_SIZE_IN_BYTES = 20;
private static readonly _DECODED_ADDRESS_OFFSET_IN_BYTES = constants.EVM_WORD_WIDTH_IN_BYTES -
AddressDataType._ADDRESS_SIZE_IN_BYTES;
public static matchType(type: string): boolean {
return type === SolidityTypes.Address;
}
public constructor(dataItem: DataItem, dataTypeFactory: DataTypeFactory) {
super(dataItem, dataTypeFactory, AddressDataType._SIZE_KNOWN_AT_COMPILE_TIME);
if (!AddressDataType.matchType(dataItem.type)) {
throw new Error(`Tried to instantiate Address with bad input: ${dataItem}`);
}
}
// Disable prefer-function-over-method for inherited abstract methods.
/* tslint:disable prefer-function-over-method */
public encodeValue(value: string): Buffer {
if (!ethUtil.isValidAddress(value)) {
throw new Error(`Invalid address: '${value}'`);
}
const valueBuf = ethUtil.toBuffer(value);
const encodedValueBuf = ethUtil.setLengthLeft(valueBuf, constants.EVM_WORD_WIDTH_IN_BYTES);
return encodedValueBuf;
}
public decodeValue(calldata: RawCalldata): string {
const valueBufPadded = calldata.popWord();
const valueBuf = valueBufPadded.slice(AddressDataType._DECODED_ADDRESS_OFFSET_IN_BYTES);
const value = ethUtil.bufferToHex(valueBuf);
return value;
}
public getSignature(): string {
return SolidityTypes.Address;
}
/* tslint:enable prefer-function-over-method */
}
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