Sign privacy marker transactions (Deprecated)
Tessera-based privacy is deprecated in Besu version 24.12.0 and later. Please read this blog post for more context on the rationale behind this decision as well as alternative options.
You can sign privacy marker transactions (PMTs) with either a random key or a specified key. To sign privacy marker transactions with a specified private key, use --privacy-marker-transaction-signing-key-file when starting Besu.
The private key file can be the same file used by --node-private-key-file, or a different key file to identify who signed the privacy marker transaction.
In networks where you pay gas, you must specify a key and the associated account must contain adequate funds.
In free gas networks, to provide further anonymity by signing each privacy marker transaction with a different random key, exclude the --privacy-marker-transaction-signing-key-file command line option when starting Besu.
You can't use account permissioning with random key signing.
If using account permissioning and privacy, a signing key must be specified using the --privacy-marker-transaction-signing-key-file command line option and the corresponding public key included in the accounts allowlist.
Besu signs privacy marker transactions during the private transaction process.