* Rework transaction processing result forwarding
Durable nonce prereq
* Add Durable Nonce program API
* Add runtime changes for Durable Nonce program
* Register Durable Nonce program
* Concise comments and bad math
* Fix c/p error
* Add rent sysvar to withdraw ix
* Remove rent exempt required balance from Meta struct
* Use the helper
* SDK: Add sysvar to expose recent block hashes to programs
* Blockhashes is one word
* Missed one
* Avoid allocs on update
* unwrap_or_else
* Use iterators
* Add microbench
* Revert "unwrap_or_else"
This reverts commit a8f8c3bfbe.
* Revert "Avoid allocs on update"
This reverts commit 486f01790c.