A cryptocurrency firm that had $610m stolen from it has offered the hacker responsible a job as the company’s chief security adviser.

Poly Network also proposed giving “Mr White Hat” a $500,000 “bug bounty” to return the hacked cryptocurrency, as well as inviting them to work for the company.

“Poly Network no intention of holding #mrwhitehat legally responsible and cordially invites him to be our Chief Security Adviser. $500,000 bounty is on the way. Whatever #mrwhitehat  chooses to do with the bounty in the end, we have no objections,” the company tweeted.

A bug bounty rewards “friendly” hackers who demonstrate security vulnerabilities in a company’s systems or software, while “White Hat” is a term for someone who hacks for ethical reasons.

Poly Network said that the hacker did not accept the bounty but may give it to the technical community who have worked on blockchain security.

The platform publicly revealed the huge hack on 10 August and asked for the money to be returned to them.

That process began the next day with the money being slowly returned to the company, which said that it had seen all but $33m in frozen Tether coins given back.

But more than $200m of the funds was left by the hacker in a locked account that required a password to access it, which they still have not record.

The platform publicly revealed the huge hack on 10 August and asked for the money to be returned to them.

That process began the next day with the money being slowly returned to the company, which said that it had seen all but $33m in frozen Tether coins given back.

But more than $200m of the funds was left by the hacker in a locked account that required a password to access it, which they still have not received.

“We have made constant efforts to establish an understanding with Mr. White Hat and genuinely hope that Mr. White Hat will transfer the private keys as soon as possible so that we can return full asset control back to the users at the earliest,” the company said on Twitter.