pub const MAX_HASH_AGE_IN_SECONDS: usize = 120;Expand description
The time window of recent block hash values over which the bank will track signatures.
Once the bank discards a block hash, it will reject any transactions that
use that recent_blockhash in a transaction. Lowering this value reduces
memory consumption, but requires a client to update its recent_blockhash
more frequently. Raising the value lengthens the time a client must wait to
be certain a missing transaction will not be processed by the network.