Optional-feature identifiers, e.g. solana:signTransactions.
OptionalmaxUpper bound on payloads per SeekerWallet.signMessages call, when the wallet enforces one.
OptionalmaxUpper bound on payloads per transaction-signing call, when the wallet enforces one.
Transaction versions the wallet can sign, e.g. legacy and 0.
Whether the wallet implements sign_and_send_transactions.
The wallet's
get_capabilitiesresponse, decoded from the wire.