hyperledger / fabric-x-committer / 26497225140

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main: 92%

Pull #601

github

Fix empty ledger newest delivery seek

When SeekPosition_Newest is used on an empty ledger (height=0),
FileLedger.Iterator(Newest) computes Height()-1, underflowing to
math.MaxUint64. Similarly, Stop=Newest computes height-1, also
underflowing. Additionally, for BLOCK_UNTIL_READY behavior, the
cursor was created before waiting for block zero, which could fail
on FileLedger since the block-zero index does not exist yet.

- Move WaitForCondition (height > 0) before cursor creation for
  BLOCK_UNTIL_READY
- In getCursor, replace Start=Newest with Specified{Number:0} when
  height is 0
- Guard Stop=Newest against zero height, returning 0 instead of
  height-1

Signed-off-by: Senthilnathan <cendhu@gmail.com>

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