OptionaladvertisedWhen set, the script's embedded pubkey must equal this x-only key.
arkd always builds the checkpoint tapscript from its own forfeitPubkey
(internal/core/application/service.go), so this should be the
forfeitPubkey the caller already trusts — pinned wallet state where one
exists, otherwise the same ArkadeInfo response's own forfeitPubkey field
as a self-consistency check.
Minimum wall-clock delay in seconds, after normalization.
Reject block-typed timelocks. Mirrors arkd, which allows a block-typed checkpoint exit delay only on regtest.
Bounds applied to a server-supplied
ArkadeInfo.checkpointTapscript.