AdvanceNonceAccount instruction updates nonce to blockhash. This makes it
possible that a durable transaction is executed twice both as a normal
transaction and a nonce transaction if it uses blockhash (as opposed to nonce)
for its recent_blockhash field.
The commit prevents this double execution by separating nonce and blockhash
domains; when advancing nonce account, blockhash is hashed with a fixed string.
As a result a blockhash cannot be a valid nonce value; and if transaction was
once executed as a normal transaction it cannot be re-executed as a durable
transaction again and vice-versa.
* Add deprecated tag to Bank::get_blockhash_last_valid_slot
* Update SendTransactionService to use last_valid_block_height
* Update solana-tokens to use last_valid_block_height
* Remove dangling file
* Update solana program to use last_valid_block_height
* Update Banks crates to use last_valid_block_height
behzad nouri
Michael Vines
Jack May
Justin Starry
Tyera Eulberg
Trent Nelson