Simplify the witness malleation test helper by converting the
ValidWitnessMalleatedTx class to a standalone function
build_malleated_tx_package() and updating call sites.
Co-authored-by: rkrux <rkrux.connect@gmail.com>
Replace test_rpcwhitelistdefault_0_no_permissions and
test_rpcwhitelistdefault_1_no_permissions with a single
test_rpcwhitelistdefault_permissions function.
Refactor satoshi_round function to accept different rounding modes.
Updated call site to use the revised `satoshi_round` function.
Co-authored-by: Kate Salazar <52637275+katesalazar@users.noreply.github.com>
naiyoma