GetAllLedgerChannels returns a `LedgerChannelInfo` for each ledger channel in the store.

GetLedgerChannelInfo returns the LedgerChannelInfo for the given channel It does this by querying the provided store.

GetPaymentChannelInfo returns the PaymentChannelInfo for the given channel It does this by querying the provided store and voucher manager.

GetPaymentChannelsByLedger returns a `PaymentChannelInfo` for each active payment channel funded by the given ledger channel.

GetVirtualFundObjective returns the virtual fund objective for the given channel if it exists.

GetVoucherBalance returns the amount paid and remaining for a given channel based on vouchers received.

TODO: Think through statuses.

TODO: Think through statuses.

TODO: Think through statuses.

TODO: Think through statuses.

LedgerChannelBalance contains the balance of a ledger channel.

LedgerChannelInfo contains balance and status info about a ledger channel.

PaymentChannelBalance contains the balance of a uni-directional payment channel.

PaymentChannelInfo contains balance and status info about a payment channel.