get
Returns the minimum lamport balance an account of a given size needs to be rent-exempt.
getMinimumBalanceForRentExemption takes an account data size in bytes and returns the lamport balance needed to be rent-exempt at that size. The runtime rejects creating an account funded below this threshold.
Programs that create accounts, including the System Program's CreateAccount, use this (or equivalent local Rent-sysvar math) to size the funding transfer.
Parameters
params is a JSON array, with values in this order: dataSize, config.
Account data length, in bytes, to compute the rent-exempt minimum for.
0Commitment configuration.
Show propertiesProperties
Bank state to read the current Rent sysvar parameters from.
finalizedconfirmedprocessedResult
The minimum rent-exempt balance, in lamports. Unlike most Accounts-category calls, this is a plain integer — it is not wrapped in a context/value envelope.
Notes
- 165 bytes is the fixed size of a standard SPL Token account (Token-2022 accounts with extensions are larger and cost more).
- This reflects the current Rent sysvar parameters, not a fixed constant; an account funded at a past minimum keeps that balance and is never retroactively topped up or refunded, so a hard-coded rent-exemption number in client code goes stale.