Initial snapshot for a raw funding book subscription (prec = R0). Raw frame: [CHAN_ID, [[OFFER_ID, PERIOD, RATE, AMOUNT], ...]].
book
prec = R0
[CHAN_ID, [[OFFER_ID, PERIOD, RATE, AMOUNT], ...]]
Initial snapshot for a raw funding
booksubscription (prec = R0). Raw frame:[CHAN_ID, [[OFFER_ID, PERIOD, RATE, AMOUNT], ...]].