import { AbiType, ConstructorAbi, DataItem } from 'ethereum-types'; import * as fs from 'fs'; import * as _ from 'lodash'; import * as path from 'path'; import { ContractsBackend, ParamKind } from './types'; export const utils = { solTypeToTsType(paramKind: ParamKind, backend: ContractsBackend, solType: string, components?: DataItem[]): string { const trailingArrayRegex = /\[\d*\]$/; if (solType.match(trailingArrayRegex)) { const arrayItemSolType = solType.replace(trailingArrayRegex, ''); const arrayItemTsType = utils.solTypeToTsType(paramKind, backend, arrayItemSolType, components); const arrayTsType = utils.isUnionType(arrayItemTsType) || utils.isObjectType(arrayItemTsType) ? `Array<${arrayItemTsType}>` : `${arrayItemTsType}[]`; return arrayTsType; } else { const solTypeRegexToTsType = [ { regex: '^string$', tsType: 'string' }, { regex: '^address$', tsType: 'string' }, { regex: '^bool$', tsType: 'boolean' }, { regex: '^u?int\\d*$', tsType: 'BigNumber' }, { regex: '^bytes\\d*$', tsType: 'string' }, ]; if (paramKind === ParamKind.Input) { // web3 and ethers allow to pass those as numbers instead of bignumbers solTypeRegexToTsType.unshift({ regex: '^u?int(8|16|32)?$', tsType: 'number|BigNumber', }); } if (backend === ContractsBackend.Ethers && paramKind === ParamKind.Output) { // ethers-contracts automatically converts small BigNumbers to numbers solTypeRegexToTsType.unshift({ regex: '^u?int(8|16|32|48)?$', tsType: 'number', }); } for (const regexAndTxType of solTypeRegexToTsType) { const { regex, tsType } = regexAndTxType; if (solType.match(regex)) { return tsType; } } const TUPLE_TYPE_REGEX = '^tuple$'; if (solType.match(TUPLE_TYPE_REGEX)) { const componentsType = _.map(components, component => { const componentValueType = utils.solTypeToTsType( paramKind, backend, component.type, component.components, ); const componentType = `${component.name}: ${componentValueType}`; return componentType; }); const tsType = `{${componentsType.join(';')}}`; return tsType; } throw new Error(`Unknown Solidity type found: ${solType}`); } }, isUnionType(tsType: string): boolean { return tsType === 'number|BigNumber'; }, isObjectType(tsType: string): boolean { return /^{.*}$/.test(tsType); }, getPartialNameFromFileName(filename: string): string { const name = path.parse(filename).name; return name; }, getNamedContent(filename: string): { name: string; content: string } { const name = utils.getPartialNameFromFileName(filename); try { const content = fs.readFileSync(filename).toString(); return { name, content, }; } catch (err) { throw new Error(`Failed to read ${filename}: ${err}`); } }, getEmptyConstructor(): ConstructorAbi { return { type: AbiType.Constructor, stateMutability: 'nonpayable', payable: false, inputs: [], }; }, };