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import { DataItem } from 'ethereum-types';
import * as _ from 'lodash';
import { Calldata } from '../calldata/calldata';
import { CalldataBlock } from '../calldata/calldata_block';
import { RawCalldata } from '../calldata/raw_calldata';
import { constants } from '../utils/constants';
import { DecodingRules, EncodingRules } from '../utils/rules';
import { DataTypeFactory } from './interfaces';
export abstract class DataType {
private readonly _dataItem: DataItem;
private readonly _factory: DataTypeFactory;
constructor(dataItem: DataItem, factory: DataTypeFactory) {
this._dataItem = dataItem;
this._factory = factory;
}
public getDataItem(): DataItem {
return this._dataItem;
}
public getFactory(): DataTypeFactory {
return this._factory;
}
public encode(value: any, rules?: EncodingRules, selector?: string): string {
const rules_ = _.isUndefined(rules) ? constants.DEFAULT_ENCODING_RULES : rules;
const calldata = new Calldata(rules_);
if (!_.isUndefined(selector)) {
calldata.setSelector(selector);
}
const block = this.generateCalldataBlock(value);
calldata.setRoot(block);
const encodedCalldata = calldata.toString();
return encodedCalldata;
}
public decode(calldata: string, rules?: DecodingRules, selector?: string): any {
if (!_.isUndefined(selector) && !_.startsWith(calldata, selector)) {
throw new Error(
`Tried to decode calldata, but it was missing the function selector. Expected prefix '${selector}'. Got '${calldata}'.`,
);
}
const hasSelector = !_.isUndefined(selector);
const rawCalldata = new RawCalldata(calldata, hasSelector);
const rules_ = _.isUndefined(rules) ? constants.DEFAULT_DECODING_RULES : rules;
const value = this.generateValue(rawCalldata, rules_);
return value;
}
public decodeAsArray(returndata: string, rules?: DecodingRules): any[] {
const value = this.decode(returndata, rules);
const valuesAsArray = _.isObject(value) ? _.values(value) : [value];
return valuesAsArray;
}
public getSignature(isDetailed?: boolean): string {
if (_.isEmpty(this._dataItem.name) || !isDetailed) {
return this.getSignatureType();
}
const name = this.getDataItem().name;
const lastIndexOfScopeDelimiter = name.lastIndexOf('.');
const isScopedName = !_.isUndefined(lastIndexOfScopeDelimiter) && lastIndexOfScopeDelimiter > 0;
const shortName = isScopedName ? name.substr((lastIndexOfScopeDelimiter as number) + 1) : name;
const detailedSignature = `${shortName} ${this.getSignatureType()}`;
return detailedSignature;
}
public abstract generateCalldataBlock(value: any, parentBlock?: CalldataBlock): CalldataBlock;
public abstract generateValue(calldata: RawCalldata, rules: DecodingRules): any;
public abstract getSignatureType(): string;
public abstract isStatic(): boolean;
}
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