@polkadot/api/util/validate.js

Promise and RxJS wrappers around the Polkadot JS RPC

import { isUndefined } from '@polkadot/util';
function sig({ lookup }, { method, section }, args) {
    return `${section}.${method}(${args.map((a) => lookup.getTypeDef(a).type).join(', ')})`;
}
export function extractStorageArgs(registry, creator, _args) {
    const args = _args.filter((a) => !isUndefined(a));
    if (creator.meta.type.isPlain) {
        if (args.length !== 0) {
            throw new Error(`${sig(registry, creator, [])} does not take any arguments, ${args.length} found`);
        }
    }
    else {
        const { hashers, key } = creator.meta.type.asMap;
        const keys = hashers.length === 1
            ? [key]
            : registry.lookup.getSiType(key).def.asTuple.map((t) => t);
        if (args.length !== keys.length) {
            throw new Error(`${sig(registry, creator, keys)} is a map, requiring ${keys.length} arguments, ${args.length} found`);
        }
    }
    // pass as tuple
    return [creator, args];
}