runtime: checked math for Bank::withdraw
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dcf2d84b24
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@ -4019,7 +4019,7 @@ impl Bank {
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self.store_account(pubkey, new_account);
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}
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pub fn withdraw(&self, pubkey: &Pubkey, lamports: u64) -> Result<()> {
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fn withdraw(&self, pubkey: &Pubkey, lamports: u64) -> Result<()> {
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match self.get_account_with_fixed_root(pubkey) {
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Some(mut account) => {
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let min_balance = match get_system_account_kind(&account) {
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@ -4029,9 +4029,11 @@ impl Bank {
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.minimum_balance(nonce::State::size()),
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_ => 0,
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};
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if lamports + min_balance > account.lamports() {
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return Err(TransactionError::InsufficientFundsForFee);
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}
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lamports
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.checked_add(min_balance)
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.filter(|required_balance| *required_balance <= account.lamports())
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.ok_or(TransactionError::InsufficientFundsForFee)?;
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account.lamports -= lamports;
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self.store_account(pubkey, &account);
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