Implement contract TTL extension functions #24
Merged
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This PR adds expiration time (as a ledger sequence number, not a timestamp) to contract instances and contract codes. It also implements the host function for extending the contract's TTL (time-to-live).
For now, this expiration time doesn't affect the behavior. It is part of the state archival system, but we do not have state archival implemented yet.
Host function:
extend_current_contract_instance_and_code_ttl
"l" "8"Note:
TTL = live_until - ledger_sequence_number