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import * as fs from 'fs';
import * as _ from 'lodash';
import * as path from 'path';
import * as Web3 from 'web3';
import { AbiType, ContractsBackend, ParamKind } from './types';
export const utils = {
solTypeToTsType(
paramKind: ParamKind,
backend: ContractsBackend,
solType: string,
components?: Web3.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}}`;
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(): Web3.ConstructorAbi {
return {
type: AbiType.Constructor,
stateMutability: 'nonpayable',
payable: false,
inputs: [],
};
},
};
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