Is this Solana blockhash still valid?

Whether a transaction built on this blockhash would still be accepted right now. A Solana transaction names a recent blockhash, and the chain accepts it only for about 150 blocks (60 to 90 seconds) after that block; after that the transaction must be rebuilt on a newer one. valid: false covers both an expired blockhash and one the chain never produced — the chain does not tell the two apart. commitment is how settled the chain state read is: processed and confirmed see a block within about a second of it, while finalized only sees it about 13 seconds later, so a brand-new blockhash reads false at finalized until its block finalizes. Never cached: every request reads the chain.