Exhibit 10.10


 


THIS PROMISSORY NOTE (“NOTE”) HAS
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT
ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES ACT OR AN
OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.


 


SECOND AMENDED AND RESTATED PROMISSORY NOTE


 


	Principal Amount: Up to $450,000	Dated as of April 1, 2021


 


UTXO Acquisition Inc., a Delaware
incorporated company and blank check company (the “Maker”), promises to pay to the order of UTXO Vector LLC, a Delaware
limited liability company, or its registered assigns or successors in interest (the “Payee”), or order, the principal
sum of up to Four Hundred and Fifty Thousand Dollars ($450,000) in lawful money of the United States of America, on the terms and conditions
described below. All payments on this Note shall be made by check or wire transfer of immediately available funds or as otherwise determined
by the Maker to such account as the Payee may from time to time designate by written notice in accordance with the provisions of this
Note.


 


This Note secondly amends
and restates in its entirety all of the terms, conditions and provisions governing outstanding advances under that certain promissory
note, dated as of September 6, 2019 (the “Original Note”), and amended first time on April 1, 2020 (the “First
Amendment”), made by the Maker to the order of the Payee. The amendment and restatement of the Original Note by this Note shall
not constitute a novation or termination of the obligations and covenants of the Maker under the Original Note, but shall constitute an
amendment and restatement of the obligations and covenants of the Maker under the Original Note.


 


1. Principal. The entire unpaid principal
balance of this Note shall be payable by the Maker on the earlier of: (i) April 30, 2022, or (ii) the date on which Maker consummates
an initial public offering (“IPO”) of its securities (the “Maturity Date”). The principal balance
may be prepaid at any time. Under no circumstances shall any individual, including but not limited to any officer, director, employee
or shareholder of the Maker, be obligated personally for any obligations or liabilities of the Maker hereunder.


 


2. Interest. No interest shall accrue
on the unpaid principal balance of this Note.


 


3. Drawdown Requests. Maker and Payee
agree that Maker may request up to Four Hundred and Fifty Thousand Dollars ($450,000) for costs reasonably related to the Maker’s
IPO. The principal of this Note may be drawn down from time to time prior to the Maturity Date (each, a “Drawdown Request”).
Each Drawdown Request must state the amount to be drawn down and must not be an amount less than Ten Thousand Dollars ($10,000) unless
agreed upon by Maker and Payee. Payee shall fund each Drawdown Request no later than five (5) business days after receipt of a Drawdown
Request; provided, however, that the maximum total of the Drawdown Requests under this Note is Four Hundred and Fifty Thousand Dollars
($450,000). Once an amount is drawn down under this Note, it shall not be available for future Drawdown Requests even if prepaid. No fees,
payments or other amounts shall be due to Payee in connection with, or as a result of, any Drawdown Request by Maker. It is acknowledged
that the Company may have received amounts in respect of drawdowns under this Note prior to the date hereof, and it is agreed that all
such sums were received as drawdowns of principal hereunder in anticipation of the execution of this Note.


 


4. Application of Payments. All payments
shall be applied first to payment in full of any costs incurred in the collection of any sum due under this Note, including (without limitation)
reasonable attorney’s fees, then to the payment in full of any late charges and finally to the reduction of the unpaid principal
balance of this Note.


 






     


     


    

 


5. Events of Default. The following
shall constitute an event of default (“Event of Default”):


 


(a) Failure to Make
Required Payments. Failure by Maker to pay the principal amount due pursuant to this Note within five (5) business days of the date
specified above.


 


(b) Voluntary Bankruptcy,
Etc. The commencement by Maker of a voluntary case under any applicable bankruptcy, insolvency, reorganization, rehabilitation or
other similar law, or the consent by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian,
sequestrator (or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment for
the benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the taking of corporate action
by Maker in furtherance of any of the foregoing.


 


(c) Involuntary Bankruptcy,
Etc. The entry of a decree or order for relief by a court having jurisdiction in the premises in respect of Maker in an involuntary
case under any applicable bankruptcy, insolvency or other similar law, or appointing a receiver, liquidator, assignee, custodian, trustee,
sequestrator (or similar official) of Maker or for any substantial part of its property, or ordering the winding-up or liquidation of
its affairs, and the continuance of any such decree or order unstayed and in effect for a period of 60 consecutive days.


  


6. Remedies.


 


(a) Upon the occurrence
of an Event of Default specified in Section 5(a) hereof, Payee may, by written notice to Maker, declare this Note to be due immediately
and payable, whereupon the unpaid principal amount of this Note, and all other amounts payable hereunder, shall become immediately due
and payable without presentment, demand, protest or other notice of any kind, all of which are hereby expressly waived, anything contained
herein or in the documents evidencing the same to the contrary notwithstanding.


 


(b) Upon the occurrence
of an Event of Default specified in Sections 5(b) or 5(c), the unpaid principal balance of this Note, and all other sums payable with
regard to this Note, shall automatically and immediately become due and payable, in all cases without any action on the part of Payee.


 


7. Waivers. Maker and all endorsers
and guarantors of, and sureties for, this Note waive presentment for payment, demand, notice of dishonor, protest, and notice of protest
with regard to the Note, all errors, defects and imperfections in any proceedings instituted by Payee under the terms of this Note, and
all benefits that might accrue to Maker by virtue of any present or future laws exempting any property, real or personal, or any part
of the proceeds arising from any sale of any such property, from attachment, levy or sale under execution, or providing for any stay of
execution, exemption from civil process, or extension of time for payment; and Maker agrees that any real estate that may be levied upon
pursuant to a judgment obtained by virtue hereof or any writ of execution issued hereon, may be sold upon any such writ in whole or in
part in any order desired by Payee.


 


8. Unconditional Liability. Maker
hereby waives all notices in connection with the delivery, acceptance, performance, default, or enforcement of the payment of this Note,
and agrees that its liability shall be unconditional, without regard to the liability of any other party, and shall not be affected in
any manner by any indulgence, extension of time, renewal, waiver or modification granted or consented to by Payee, and consents to any
and all extensions of time, renewals, waivers, or modifications that may be granted by Payee with respect to the payment or other provisions
of this Note, and agrees that additional makers, endorsers, guarantors, or sureties may become parties hereto without notice to Maker
or affecting Maker’s liability hereunder.


 






    2


     


    

 


9. Notices. All notices, statements
or other documents which are required or contemplated by this Note shall be made in writing and delivered: (i) personally or sent by first
class registered or certified mail, overnight courier service or facsimile or electronic transmission to the address designated in writing,
(ii) by facsimile to the number most recently provided to such party or such other address or fax number as may be designated in writing
by such party or (iii) by electronic mail, to the electronic mail address most recently provided to such party or such other electronic
mail address as may be designated in writing by such party. Any notice or other communication so transmitted shall be deemed to have been
given on the day of delivery, if delivered personally, on the business day following receipt of written confirmation, if sent by facsimile
or electronic transmission, one (1) business day after delivery to an overnight courier service or five (5) days after mailing if sent
by mail.


 


10. Construction. THIS NOTE SHALL
BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE, WITHOUT REGARD TO CONFLICT OF LAW PROVISIONS THEREOF.


 


11. Severability. Any provision contained
in this Note which is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of
such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition or unenforceability
in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction.


 


12. Trust Waiver. Notwithstanding
anything herein to the contrary, the Payee hereby waives any and all right, title, interest or claim of any kind (“Claim”)
in or to any distribution of or from the trust account to be established in which the proceeds of the IPO (including the deferred underwriters
discounts and commissions) and the proceeds of the sale of the warrants to be issued in a private placement to occur prior to the closing
of the IPO are to be deposited, as described in greater detail in the registration statement and prospectus to be filed with the Securities
and Exchange Commission in connection with the IPO, and hereby agrees not to seek recourse, reimbursement, payment or satisfaction for
any Claim against the trust account for any reason whatsoever.


 


13. Amendment; Waiver. Any amendment
hereto or waiver of any provision hereof may be made with, and only with, the written consent of the Maker and the Payee.


  


14. Assignment. No assignment or transfer
of this Note or any rights or obligations hereunder may be made by any party hereto (by operation of law or otherwise) without the prior
written consent of the other party hereto and any attempted assignment without the required consent shall be void.


 






    3


     


    

 


IN WITNESS WHEREOF, Maker,
intending to be legally bound hereby, has caused this Note to be duly executed as deed by the undersigned on the day and year first above
written.


 


	 	UTXO Acquisition Inc.
	 	 
	 	By:	/s/ Wei Huang
	 	 	Name: 	Wei Huang
	 	 	Title:	Chief Executive Officer


 


 


4