π Swap Legacy NFTs β
We developed a solution to swap (exchange) old legacy Hedera NFTs for new version, with ease!
Demonstrated with Lazy Super Dogs already.
https://app.lazysuperheroes.com/swap
Three swaps have run on mainnet, and each contract stays live so late swappers are never stranded:
| Swap | Contract |
|---|---|
| Gen 2 β Gen 2.5 art upgrade | 0.0.6320417 |
| Lazy Super Dogs β per-piece tokens into one collection | 0.0.1992106 |
| Hashgraph Cards & Gems β per-piece tokens into one collection | 0.0.10584052 |
Source
The swap contracts are open source at hedera-SC-LAZY-tokenswap. UnifiedTokenSwap is the current one: it handles multiple input/output token combinations, bypasses NFT fallback royalty fees on each leg, and can send the retired NFTs to the Token Graveyard for permanent disposal rather than to a treasury.