diff --git a/utils/GunSmith/GunSmith.spec.js b/utils/GunSmith/GunSmith.spec.js
new file mode 100644
index 00000000..a577b99a
--- /dev/null
+++ b/utils/GunSmith/GunSmith.spec.js
@@ -0,0 +1,332 @@
+/* eslint-disable jest/prefer-strict-equal */
+/* eslint-disable jest/no-test-callback */
+/**
+ * @format
+ */
+// @ts-check
+const Gun = require('./GunSmith')
+const words = require('random-words')
+
+/** @type {ReturnType<typeof Gun>} */
+// eslint-disable-next-line init-declarations
+let instance
+
+/**
+ * @param {any} o
+ * @returns {any}
+ */
+const removeBuiltInGunProps = (o) => {
+  if (typeof o === 'object' && o !== null) {
+    delete o._
+    delete o['#']
+    return o
+  }
+
+  console.log(o)
+  throw new TypeError('Non object passed to removeBuiltInGunProps: ' + JSON.stringify(o))
+}
+
+describe('constructor', () => {
+  // eslint-disable-next-line jest/no-hooks
+  beforeEach(() => {
+    instance = Gun({
+      axe: false,
+      multicast: false,
+      file: Math.random().toString()
+    })
+  })
+
+  // eslint-disable-next-line jest/no-hooks
+  afterAll(() => {
+    if (instance) {
+      instance.kill()
+    }
+  })
+
+  it('puts a true and reads it with once()', done => {
+    expect.hasAssertions()
+    const a = words()
+    const b = words()
+    instance
+      .get(a)
+      .get(b)
+      .put(true)
+
+    instance
+      .get(a)
+      .get(b)
+      .once(val => {
+        expect(val).toStrictEqual(true)
+        done()
+      })
+  })
+
+  it('puts a false and reads it with once()', (done) => {
+    expect.hasAssertions()
+    const a = words()
+    const b = words()
+    instance
+      .get(a)
+      .get(b)
+      .put(false)
+
+    instance
+      .get(a)
+      .get(b)
+      .once(val => {
+        expect(val).toBe(false)
+        done()
+      })
+  })
+
+  it('puts numbers and reads them with once()', (done) => {
+    expect.hasAssertions()
+    const a = words()
+    const b = words()
+    instance
+      .get(a)
+      .get(b)
+      .put(5)
+
+    instance
+      .get(a)
+      .get(b)
+      .once(val => {
+        expect(val).toBe(5)
+        done()
+      })
+  })
+
+  it('puts strings and reads them with once()', (done) => {
+    expect.hasAssertions()
+    const a = words()
+    const b = words()
+    const sentence = words({ exactly: 50 }).join(' ')
+
+    instance
+      .get(a)
+      .get(b)
+      .put(sentence)
+
+    instance
+      .get(a)
+      .get(b)
+      .once(val => {
+        expect(val).toBe(sentence)
+        done()
+      })
+  })
+
+  it('merges puts', (done) => {
+    expect.hasAssertions()
+    const a = {
+      a: 1,
+    }
+    const b = {
+      b: 1,
+    }
+    const c = {...a,...b}
+    
+    const node = instance.get('foo').get('bar')
+
+    node.put(a)
+    node.put(b)
+    
+
+    node
+      .once(data => {
+        if (typeof data !== 'object' || data === null) {
+          done(new Error('Data not an object'))
+          return;
+        }
+        expect(removeBuiltInGunProps(data)).toEqual(c)
+        done()
+      })
+  })
+
+  it('writes primitive items into sets', done => {
+    expect.hasAssertions()
+    const node = instance.get(words()).get(words())
+
+    const item = node.set('hello')
+
+    node.once(data => {
+      if (typeof data !== 'object' || data === null) {
+        done(new Error('Data not an object'))
+        return;
+      }
+
+      expect(removeBuiltInGunProps(data)).toEqual({
+        [item._.get]: 'hello'
+      })
+      done()
+    })
+  })
+
+  it('writes object items into sets', done => {
+    expect.hasAssertions()
+    const node = instance.get(words()).get(words())
+
+    const obj = {
+      a: 1,
+      b: 'hello'
+    }
+
+    const item = node.set(obj)
+
+     node.get(item._.get).once(data => {
+      if (typeof data !== 'object' || data === null) {
+        done(new Error('Data not an object'))
+        return;
+      }
+
+      expect(removeBuiltInGunProps(data)).toEqual(obj)
+      done()
+    })
+  })
+
+  it('maps over a primitive set', (done) => {
+    expect.assertions(100)
+    
+    const node = instance.get(words()).get(words())
+
+    const items = words({ exactly: 50 })
+
+    const ids = items.map(i => node.set(i)._.get)
+
+    let checked = 0
+    
+    node.map().on((data, id) => {
+      expect(items).toContain(data)
+      expect(ids).toContain(id)
+      checked++
+      if (checked === 50) {
+        done()
+      }
+    })
+  })
+
+  it('maps over an object set', (done) => {
+    expect.assertions(100)
+    
+    const node = instance.get(words()).get(words())
+
+    const items = words({ exactly: 50 }).map(w => ({
+      word: w,
+    }))
+
+    const ids = items.map(i => node.set(i)._.get)
+
+    let checked = 0
+    
+    node.map().on((data, id) => {
+      expect(items).toContainEqual(removeBuiltInGunProps(data))
+      expect(ids).toContain(id)
+      checked++
+      if (checked === 50) {
+        done()
+      }
+    })
+  })
+
+  it('offs `on()`s', done => {
+    expect.assertions(1)
+
+    const node = instance.get(words()).get(words())
+
+    const fn = jest.fn()
+
+    node.on(fn);
+
+    node.off()
+
+    node.put('return', ack => {
+      if (ack.err) {
+        done(new Error(ack.err))
+      } else {
+        expect(fn).not.toHaveBeenCalled()
+        done()
+      }
+    })
+  })
+
+  it('offs `map().on()`s', done => {
+    expect.assertions(1)
+
+    const node = instance.get(words()).get(words())
+
+    const fn = jest.fn()
+
+    const iterateeNode = node.map()
+
+    iterateeNode.on(fn)
+
+    iterateeNode.off()
+
+    node.set('return', ack => {
+      if (ack.err) {
+        done(new Error(ack.err))
+      } else {
+        expect(fn).not.toHaveBeenCalled()
+        done()
+      }
+    })
+  })
+
+  it('on()s and handles object>primitive>object transitions', done => {
+    expect.assertions(3)
+
+    const a = {
+      one: 1,
+    }
+    const b = 'two'
+    const c = {
+      three: 3
+    }
+    const d = {...a,...c}
+
+    const node = instance.get(words()).get(words())
+
+    let checked = 0
+
+    node.on(data => {
+      checked++
+      if (checked === 1) {
+        expect(removeBuiltInGunProps(data)).toEqual(a)
+      } else if (checked === 2) {
+        expect(data).toBe(b)
+      } else if (checked === 3) {
+        expect(removeBuiltInGunProps(data)).toEqual(d)
+        done()
+      }
+    })
+
+    node.put(a)
+    setTimeout(() => {
+      node.put(b)
+    }, 400)
+    setTimeout(() => {
+      node.put(c)
+    }, 800)
+  })
+
+  it('provides an user node with create(), auth() and leave()', async (done) => {
+    expect.assertions(3)
+
+    const user = instance.user();
+    const alias = words()
+    const pass = words()
+
+    const ack = await new Promise(res => user.create(alias, pass, res));
+    expect(ack.err).toBeUndefined()
+
+    const {pub} = ack;
+    
+    user.leave()
+
+    const authAck = await new Promise(res => user.auth(alias, pass, ack => res(ack)))
+    expect(authAck.err).toBeUndefined()
+    expect(authAck.sea.pub).toEqual(pub)
+    done()
+  })
+})