Tangem xdr signer

[rahimklaber]

Link the bounty file

https://github.com/tyvdh/stellar-quest-bounties/blob/main/bounties/level-2/tangem-xdr-signer.md

Mark your progress

• 🔵  Started working
• 🟢  Ready for review
• 🟣  Review completed

Provide relevant details

repo : https://github.com/rahimklaber/tangem_signer