The Sandbox — LAND Good Contract Migration

The Sandbox LANDs are migrating to a brand new good contract

  • A brand new model of the LAND smart-contract has been deployed; its deal with is 0x5CC5B05a8A13E3fBDB0BB9FcCd98D38e50F90c38
  • The migration interface will be discovered right here:
  • The earlier good contract contained a vulnerability that was first reported on December twenty fifth, 2021.
  • The vulnerability has been mounted and the repair audited. It has not been exploited by any malicious person and has now been secured.
  • The problem didn’t enable transfers nor minting of latest LAND and no tokens have been compromised. Moreover, we’ve run thorough investigations on our different good contracts and none of them are in danger.
  • We deployed a migration good contract to let everybody migrate their LAND to the brand new LAND contract; its deal with is 0x371f4c6fd305c6772Bc6224b795b0B46b6B6f8dB
  • There isn’t any value concerned on the person’s facet. All migration gasoline prices are completely lined by The Sandbox.

The Sandbox smart contracts have been extensively audited by two high safety corporations, Certik and Solidified, and acquired high-security scores. These audits will be accessed publicly on our Github repository. The LAND good contract was initially audited by Certik on December 10th, 2019, and concerned three auditors by way of a two-week course of.

Nevertheless, a vulnerability was first found on December twenty fifth, 2021.

Upon studying of the vulnerability, we took speedy motion to repair the problem, as the next timeline demonstrates:

  • On Dec twenty fifth, a safety researcher referred to as Danel Hazlewood (@Alphasoups) notified us of the vulnerability.
  • On Dec twenty fifth, we carried out inside exams and confirmed the reproducibility of the problem.
  • Between December twenty fifth and thirtieth, we labored on a repair and submitted it for audit again by Certik security auditors to substantiate the repair didn’t introduce new vulnerabilities.
  • After consulting with fellow builders, all of us agreed the perfect plan of action was to deploy the repair and allow customers emigrate all LAND tokens to the brand new good contract with none prices (gasless help).
  • The foundation trigger has been investigated and a brand new good contract migration and interface has been developed.
  • On January twenty eighth, we deployed the brand new mounted good contract; the deal with is 0x371f4c6fd305c6772Bc6224b795b0B46b6B6f8dB
  • We additionally deployed extra safety measures to make sure the security of all LAND whereas the migration is in progress
  • On January twenty eighth, we launched our migration interface to let each LAND proprietor migrate their LAND tokens to the brand new contract. All of the gasoline prices related are completely lined by The Sandbox. No charges are incurred by our customers

After peer-reviewing a number of options, all of us agreed that the perfect plan of action was to schedule a migration from the previous LAND contract to the brand new one.


This migration just isn’t compelled upon customers. They’ll do it at their very own tempo when they’re prepared.

We’re masking the gasoline prices by way of the deployment of a gasless characteristic for this migration.

So, don’t fear — this course of:

  • Is free to all customers
  • Has no time restrict

We launched the migration interface on January twenty eighth:


When you want help emigrate your LAND tokens, please contact us by way of

We plan to maintain the neighborhood up to date on the general progress of the migration. We’re conscious this can be a very distinctive scenario and are doing every little thing we are able to to maintain the method as seamless and clear as doable.

Thanks to your help and understanding.

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