Module complete

Structs

• CompleteHtlcState
• GatewayCompleteCommon
• GatewayCompleteStateMachine
• WaitForPreimageState

Enums

• CompleteHtlcError 🔒
• GatewayCompleteStates
  State machine that completes the incoming payment by contacting the lightning node when the incoming contract has been funded and the preimage is available.
• HtlcOutcome 🔒