harmonize percentage members (#5459)
* harmonize percentage members * update tests * update capitalization when burning fees * verify capitalization in fee burn * fixup
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@ -627,6 +627,7 @@ mod tests {
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use crate::contact_info::ContactInfo;
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use crate::genesis_utils::{create_genesis_block, GenesisBlockInfo};
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use jsonrpc_core::{MetaIoHandler, Output, Response, Value};
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use solana_sdk::fee_calculator::DEFAULT_BURN_PERCENT;
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use solana_sdk::hash::{hash, Hash};
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use solana_sdk::instruction::InstructionError;
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use solana_sdk::signature::{Keypair, KeypairUtil};
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@ -958,7 +959,7 @@ mod tests {
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let expected = json!({
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"jsonrpc": "2.0",
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"result": [ blockhash.to_string(), {
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"burnPercent": 50,
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"burnPercent": DEFAULT_BURN_PERCENT,
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"lamportsPerSignature": 0,
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"maxLamportsPerSignature": 0,
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"minLamportsPerSignature": 0,
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@ -467,8 +467,11 @@ impl Bank {
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let collector_fees = self.collector_fees.load(Ordering::Relaxed) as u64;
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if collector_fees != 0 {
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let (unburned, burned) = self.fee_calculator.burn(collector_fees);
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// burn a portion of fees
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self.deposit(&self.collector_id, self.fee_calculator.burn(collector_fees));
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self.deposit(&self.collector_id, unburned);
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self.capitalization
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.fetch_sub(burned as usize, Ordering::Relaxed);
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}
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}
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@ -1791,10 +1794,13 @@ mod tests {
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genesis_block.fee_calculator.lamports_per_signature = 4; // something divisible by 2
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let expected_fee_paid = genesis_block.fee_calculator.lamports_per_signature;
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let expected_fee_collected = genesis_block.fee_calculator.burn(expected_fee_paid);
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let (expected_fee_collected, expected_fee_burned) =
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genesis_block.fee_calculator.burn(expected_fee_paid);
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let mut bank = Bank::new(&genesis_block);
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let capitalization = bank.capitalization();
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let key = Keypair::new();
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let tx = system_transaction::transfer(
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&mint_keypair,
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@ -1819,6 +1825,9 @@ mod tests {
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initial_balance + expected_fee_collected
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); // Leader collects fee after the bank is frozen
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// verify capitalization
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assert_eq!(capitalization - expected_fee_burned, bank.capitalization());
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// Verify that an InstructionError collects fees, too
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let mut bank = Bank::new_from_parent(&Arc::new(bank), &leader, 1);
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let mut tx =
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@ -1929,6 +1938,7 @@ mod tests {
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+ bank
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.fee_calculator
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.burn(bank.fee_calculator.lamports_per_signature * 2)
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.0
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);
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assert_eq!(results[0], Ok(()));
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assert_eq!(results[1], Ok(()));
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@ -21,7 +21,7 @@ pub struct FeeCalculator {
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pub min_lamports_per_signature: u64,
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pub max_lamports_per_signature: u64,
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// What portion of collected fees are to be destroyed, percentage-wise
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// What portion of collected fees are to be destroyed, as a fraction of std::u8::MAX
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pub burn_percent: u8,
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}
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@ -29,7 +29,7 @@ pub struct FeeCalculator {
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pub const DEFAULT_TARGET_LAMPORTS_PER_SIGNATURE: u64 = 42;
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pub const DEFAULT_TARGET_SIGNATURES_PER_SLOT: usize =
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710_000 * DEFAULT_TICKS_PER_SLOT as usize / DEFAULT_NUM_TICKS_PER_SECOND as usize;
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pub const DEFAULT_BURN_PERCENT: u8 = 50;
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pub const DEFAULT_BURN_PERCENT: u8 = 127;
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impl Default for FeeCalculator {
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fn default() -> Self {
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@ -127,9 +127,10 @@ impl FeeCalculator {
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self.lamports_per_signature * u64::from(message.header.num_required_signatures)
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}
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/// calculate unburned fee from a fee total
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pub fn burn(&self, fees: u64) -> u64 {
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fees * u64::from(100 - self.burn_percent) / 100
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/// calculate unburned fee from a fee total, returns (unburned, burned)
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pub fn burn(&self, fees: u64) -> (u64, u64) {
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let unburned = fees * u64::from(std::u8::MAX - self.burn_percent) / u64::from(std::u8::MAX);
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(unburned, fees - unburned)
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}
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}
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@ -143,13 +144,13 @@ mod tests {
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fn test_fee_calculator_burn() {
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let mut fee_calculator = FeeCalculator::default();
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assert_eq!(fee_calculator.burn(2), 1);
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assert_eq!(fee_calculator.burn(2), (1, 1));
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fee_calculator.burn_percent = 0;
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assert_eq!(fee_calculator.burn(2), 2);
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fee_calculator.burn_percent = 100;
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assert_eq!(fee_calculator.burn(2), 0);
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assert_eq!(fee_calculator.burn(2), (2, 0));
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fee_calculator.burn_percent = std::u8::MAX;
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assert_eq!(fee_calculator.burn(2), (0, 2));
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}
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#[test]
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