get
Extracts the WASM hash (ID) from an upload contract WASM transaction.
This helper function parses the transaction metadata and extracts the WASM hash from the return value of a successful WASM upload operation.
Return
The WASM hash as a hex string (lowercase), or null if: - The transaction is not a successful upload operation - The resultMetaXdr is null - The return value is not a bytes value
Throws
if the XDR cannot be parsed