NewSealedPrivatePayload creates new SealedPrivatePayload instance with given parameters.

Read tx's payload replacement, retrieve encrypted payload from IPFS and decrypt it.

SealPrivatePayload encrypts private tx's payload and sends it to IPFS, then replaces the payload with the address in IPFS.

Indicate whether support private transaction functionality.

PayloadReplacement represents the replacement data which substitute the private tx payload.

SealedPrivatePayload represents a sealed payload entity in IPFS.