Position of the leaf within the Merkle tree, used with the Merkle proof to locate and verify the leaf.
Tree-scoped nonce identifying the leaf, equal to the tree's
numMinted at the time the leaf was minted. Combined with the tree
address to derive the leaf's asset id.
Current Merkle root of the tree, used together with the Merkle proof (passed as remaining accounts) to verify the leaf being operated on.
The metadata fields to change; fields left unset keep their current value on the leaf.
The leaf's current metadata args, verified against
dataHashbeforeupdateArgsis applied.