Holograph App FAQ

What file types are supported?

File	Format	Thumbnail
Image	jpeg, png, gif	NA

What marketplaces are supported?

Ethereum Marketplaces

Marketplace	Integration	Comments
OpenSea	Connect wallet to display NFTs	Works best for NFTs that where minted natively on Ethereum. Works inconsistently for NFTs that where bridged from another network (this is a problem with OpenSea, not Holograph).
LooksRare	Connect wallet to display NFTs	Works best for NFTs that where minted natively on Ethereum.
Rarible	Connect wallet to display NFTs	Works best for NFTs that where minted natively on Ethereum.

Polygon Marketplaces

Marketplace	Integration	Comments
OpenSea	Connect wallet to display NFTs	Works best for NFTs that where minted natively on Polygon. Works inconsistently for NFTs that where bridged from another network (this is a problem with OpenSea, not Holograph).

Avalanche Marketplaces

Marketplace	Integration	Comments
OpenSea	Connect wallet to display NFTs	Works best for NFTs that where minted natively on Avalanche. Works inconsistently for NFTs that where bridged from another network (this is a problem with OpenSea, not Holograph).
JoePegs	Connect wallet to display NFTs	Works best for NFTs that where minted natively on Avalanche.

Note

After bridging, some NFTs may not appear as expected on OpenSea. This is due to OpenSea’s NFT Indexer, which is not yet configured to accommodate natively composable multichain NFTs. NFT Indexers are used by marketplaces to read and display on-chain data. Because Holograph NFTs maintain the same contract address and tokenID on all networks, OpenSea’s NFT indexer gets confused and fails to properly index the NFT after bridging. That said, we have an open dialogue with their engineering team and are working on a solution.

What are the avergage NFT bridge transaction times?

From	To	Time
Ethereum	Polygon	~30 minutes
Ethereum	Avalanche	~20 minutes
Polygon	Ethereum	~30 minutes
Polygon	Avalanche	~30 minutes
Avalanche	Ethereum	~5 minutes
Avalanche	Polygon	~15 minutes

Note

Bridge transaction times average between 20 to 30 minutes for most network combinations. This is due to a number factors like network congestion, supply of validators, and demand for transaction verification, all of which are outside the control of Holograph Protocol. Furthermore, Holograph uses LayerZero’s default block parameters, which are set to avoid potentially devastating chain reorganizations. That said, Holograph may modify these parameters in the future.