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Lightning Network (BOLT) Normal Operation Sequence

H
Hiroki Gondo

The document describes the normal operation sequence of the Lightning Network protocol. It shows a series of messages exchanged between two nodes (A and B) to update payment channels. The sequence involves 6 messages - two nodes send update messages, commit to the updates, then revoke previous commitments and send new commitment transactions.

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Lightning Network (BOLT) Normal Operation Sequence Hiroki Gondo (Nayuta inc.) 2019/05/21
+-----+ +-----+ | |--- update A -->| | | |<-- update B ---| | | | | | | | | | | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ | |--- update A -->| | How many more messages | |<-- update B ---| | are needed? | | | | | | ? | | a. 2 messages | | ? | | b. 4 messages | A | ? | B | c. 6 messages | | ? | | d. more | | ? | | | | ? | | | | ? | | | | ? | | +-----+ +-----+
+------------+ +-----+ +-----+ +------------+ |commit tx #0| | |--- update A -->| | |commit tx #0| +------------+ | |<-- update B ---| | +------------+ |sig | | | | | |sig | +------------+ | | | | +------------+ | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
Lightning Network (BOLT) Normal Operation Sequence
+-----+ +-----+ +-------------+ | | | | |commit tx #0 | | | | | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | | | | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | | | | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | |---- commit --->| | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | |---- commit --->| | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |sig | +-----+ +-----+ +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | |---- commit --->| | +-------------+ | |<--- revoke ----| | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |sig | +-----+ +-----+ +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | |---- commit --->| | +-------------+ | |<--- revoke ----| | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |sig | +-----+ +-----+ +-------------+
+-----+ +-----+ | |--- update A -->| | | |<-- update B ---| |(update B) | | | | | |---- commit --->| | | |<--- revoke ----| | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |sig | +-----+ +-----+ +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| |(update B) +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| |(update B) +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | | | | | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| |(update B) +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | | | | +-------------+ | | | | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | | | | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | | | | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | | | | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
+-----+ +-----+ | |--- update A -->| | | |<-- update B ---| | | | | | | |---- commit --->| | | |<--- revoke ----| | | A | | B | | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+ Ans. 6 messages
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+ Ans. 6 messages ???
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- commit ----| | |update B | | A |<--- revoke ----| B | +-------------+ | |---- revoke --->| | |sig | | |---- commit --->| | +-------------+ | |<--- revoke ----| | | |<--- commit ----| | | |---- revoke --->| | +-----+ +-----+ Ans. 6 or 8 messages
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- commit ----| | |update B | | A |<--- revoke ----| B | +-------------+ | |---- revoke --->| | |sig | | |---- commit --->| | +-------------+ | |<--- revoke ----| | | |<--- commit ----| | | |---- revoke --->| | +-----+ +-----+ Ans. 6 or 8 messages
Lightning Network (BOLT) Normal Operation Sequence
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+ Why?
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+ Why?
Lightning Network (BOLT) Normal Operation Sequence
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |update B !!! | | A | | B | +-------------+ | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |update B | | A |---- commit --->| B | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |update B | | A |---- commit --->| B | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | | update B -| | +-------------+ | | / | | |update A | | | / | | +-------------+ | | / | | |update B | | A |---- commit --->| B | +-------------+ | | / | | |sig | | | / | | +-------------+ | |<-------- | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | | update B -| | +-------------+ | | / | | |update A | | | / | | +-------------+ | | / | | |update B | | A |---- commit --->| B | +-------------+ | | / | | |sig (invalid)| | | / | | +-------------+ | |<-------- | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | | update B -| | +-------------+ | | / | | |update A | | | / | | +-------------+ | |<------------ | | |update B | | A |---- commit --->| B | +-------------+ | | | | |sig (valid) | | | | | +-------------+ | | | | | | | | | | | | +-----+ +-----+
+-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
BOLT #2: Peer Protocol for Channel Management Normal Operation > Counter-intuitively, these updates apply to the other > node's commitment transaction; the node only adds those > updates to its own commitment transaction when the remote > node acknowledges it has applied them via > `revoke_and_ack`.

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Lightning Network (BOLT) Normal Operation Sequence

  • 1. Lightning Network (BOLT) Normal Operation Sequence Hiroki Gondo (Nayuta inc.) 2019/05/21
  • 2. +-----+ +-----+ | |--- update A -->| | | |<-- update B ---| | | | | | | | | | | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
  • 3. +-----+ +-----+ | |--- update A -->| | How many more messages | |<-- update B ---| | are needed? | | | | | | ? | | a. 2 messages | | ? | | b. 4 messages | A | ? | B | c. 6 messages | | ? | | d. more | | ? | | | | ? | | | | ? | | | | ? | | +-----+ +-----+
  • 4. +------------+ +-----+ +-----+ +------------+ |commit tx #0| | |--- update A -->| | |commit tx #0| +------------+ | |<-- update B ---| | +------------+ |sig | | | | | |sig | +------------+ | | | | +------------+ | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
  • 6. +-----+ +-----+ +-------------+ | | | | |commit tx #0 | | | | | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
  • 7. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | | | | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
  • 8. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | | | | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | +-----+ +-----+
  • 9. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | +-----+ +-----+
  • 10. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | | | | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | +-----+ +-----+
  • 11. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | |---- commit --->| | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | +-----+ +-----+
  • 12. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | |---- commit --->| | +-------------+ | | | | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |sig | +-----+ +-----+ +-------------+
  • 13. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | |---- commit --->| | +-------------+ | |<--- revoke ----| | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |sig | +-----+ +-----+ +-------------+
  • 14. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #0 | | |<-- update B ---| |(update B) +-------------+ | | | | |sig | | |---- commit --->| | +-------------+ | |<--- revoke ----| | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |sig | +-----+ +-----+ +-------------+
  • 15. +-----+ +-----+ | |--- update A -->| | | |<-- update B ---| |(update B) | | | | | |---- commit --->| | | |<--- revoke ----| | | A | | B | +-------------+ | | | | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |sig | +-----+ +-----+ +-------------+
  • 16. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| |(update B) +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
  • 17. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| |(update B) +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | | | | | | | | | | | | | | | | +-----+ +-----+
  • 18. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| |(update B) +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | | | | | | | | | | | | | +-----+ +-----+
  • 19. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | | | | +-------------+ | | | | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+
  • 20. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | | | | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+
  • 21. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | | | | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
  • 22. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | | | | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
  • 23. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
  • 24. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |sig | | A | | B | +-------------+ | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
  • 25. +-----+ +-----+ | |--- update A -->| | | |<-- update B ---| | | | | | | |---- commit --->| | | |<--- revoke ----| | | A | | B | | |<--- commit ----| | | |---- revoke --->| | +-------------+ | | | | |commit tx #2 | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update A | +-----+ +-----+ +-------------+ |update B | +-------------+ |sig | +-------------+
  • 26. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
  • 27. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+ Ans. 6 messages
  • 28. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+ Ans. 6 messages ???
  • 29. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- commit ----| | |update B | | A |<--- revoke ----| B | +-------------+ | |---- revoke --->| | |sig | | |---- commit --->| | +-------------+ | |<--- revoke ----| | | |<--- commit ----| | | |---- revoke --->| | +-----+ +-----+ Ans. 6 or 8 messages
  • 30. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- commit ----| | |update B | | A |<--- revoke ----| B | +-------------+ | |---- revoke --->| | |sig | | |---- commit --->| | +-------------+ | |<--- revoke ----| | | |<--- commit ----| | | |---- revoke --->| | +-----+ +-----+ Ans. 6 or 8 messages
  • 32. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
  • 33. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
  • 34. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
  • 35. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+ Why?
  • 36. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
  • 37. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+ Why?
  • 39. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | | | | +-------------+ | | | | |update A | | | | | +-------------+ | | | | | A | | B | | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
  • 40. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |update B !!! | | A | | B | +-------------+ | | | | | | | | | | | | | | | | | | | | +-----+ +-----+
  • 41. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |update B | | A |---- commit --->| B | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | | | | | | | | +-----+ +-----+
  • 42. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | |<-- update B ---| | +-------------+ | | | | |update A | | | | | +-------------+ | | | | |update B | | A |---- commit --->| B | +-------------+ | | | | |sig | | | | | +-------------+ | | | | | | | | | | | | +-----+ +-----+
  • 43. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | | update B -| | +-------------+ | | / | | |update A | | | / | | +-------------+ | | / | | |update B | | A |---- commit --->| B | +-------------+ | | / | | |sig | | | / | | +-------------+ | |<-------- | | | | | | | | | | +-----+ +-----+
  • 44. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | | update B -| | +-------------+ | | / | | |update A | | | / | | +-------------+ | | / | | |update B | | A |---- commit --->| B | +-------------+ | | / | | |sig (invalid)| | | / | | +-------------+ | |<-------- | | | | | | | | | | +-----+ +-----+
  • 45. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #1 | | | update B -| | +-------------+ | | / | | |update A | | | / | | +-------------+ | |<------------ | | |update B | | A |---- commit --->| B | +-------------+ | | | | |sig (valid) | | | | | +-------------+ | | | | | | | | | | | | +-----+ +-----+
  • 46. +-----+ +-----+ +-------------+ | |--- update A -->| | |commit tx #2 | | |<-- update B ---| | +-------------+ | | | | |update A | | |---- commit --->| | +-------------+ | |<--- revoke ----| | |update B | | A | | B | +-------------+ | |<--- commit ----| | |sig | | |---- revoke --->| | +-------------+ | | | | | |---- commit --->| | | |<--- revoke ----| | +-----+ +-----+
  • 47. BOLT #2: Peer Protocol for Channel Management Normal Operation > Counter-intuitively, these updates apply to the other > node's commitment transaction; the node only adds those > updates to its own commitment transaction when the remote > node acknowledges it has applied them via > `revoke_and_ack`.
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