Minimalistic client for keyval.org

example.js

 const key = await KeyVal.save('test');
 const val = await KeyVal.get(key);
 console.assert(val === 'test', 'Should return saved value');

 await KeyVal.set('myKey', 'myVal');
 const myVal = await KeyVal.get('myKey');
 console.assert(myVal === 'myVal', 'Should return value for myKey');

keyval.org.client.js

const KeyVal = (({ ns, encode = btoa, decode = btoa }) => {
  const URL = `https://api.keyval.org`;
  const withNs = (key) => (ns ? `${ns}--${key}` : key);
  return {
    save: (val) =>
      fetch(`${URL}/set/-/${val}`, { method: 'POST' })
        .then((r) => r.json())
        .then((data) => ({ __rawKey: data.key })),
    set: (key, val) =>
      fetch(`${URL}/set/${withNs(key)}/${encode(val)}`, { method: 'POST' })
        .then((r) => r.json())
        .then((data) => {
          switch (data.status) {
            case '-KEY-ALREADY-EXISTS-':
              throw Error('Key already exists');
            case '-KEY-DOESNT-EXISTS-':
              throw Error('Key doesnt exists');
            case 'SUCCESS':
              return true;
            default:
              throw Error('Unknown Error');
          }
        }),
    get: (key) =>
      fetch(`${URL}/get/${typeof key === 'string' ? withNs(key) : key.__rawKey}`)
        .then((r) => r.json())
        .then((data) => decode(data.val)),
  };
})({ ns: Date.now() });

keyval.org.client.ts

type KeyValClientOptions<T> = {
  ns?: string;
  encode?: (payload: T) => string;
  decode?: (payload: string) => T;
}

// @ts-ignore
const KeyVal = (<T>({ ns, encode = btoa, decode = btoa }: KeyValClientOptions<T>) => {
  const URL = `https://api.keyval.org`;
  const withNs = (key: string) => (ns ? `${ns}--${key}` : key);
  return {
    save: (val: T) =>
      fetch(`${URL}/set/-/${val}`, { method: 'POST' })
        .then((r) => r.json())
        .then((data) => ({ __rawKey: data.key })),
    set: (key: string, val: T) =>
      fetch(`${URL}/set/${withNs(key)}/${encode(val)}`, { method: 'POST' })
        .then((r) => r.json())
        .then((data) => {
          switch (data.status) {
            case '-KEY-ALREADY-EXISTS-':
              throw Error('Key already exists');
            case '-KEY-DOESNT-EXISTS-':
              throw Error('Key doesnt exists');
            case 'SUCCESS':
              return true;
            default:
              throw Error('Unknown Error');
          }
        }),
    get: (key: string | { __rawKey: string }) =>
      fetch(`${URL}/get/${typeof key === 'string' ? withNs(key) : key.__rawKey}`)
        .then((r) => r.json())
        .then((data) => decode(data.val)),
  };
})({ ns: String(Date.now()) });