plugeth/consensus/misc/eip4844/eip4844_test.go

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// Copyright 2023 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package eip4844
import (
"fmt"
"math/big"
"testing"
"github.com/ethereum/go-ethereum/params"
)
func TestCalcExcessBlobGas(t *testing.T) {
var tests = []struct {
excess uint64
blobs uint64
want uint64
}{
// The excess blob gas should not increase from zero if the used blob
// slots are below - or equal - to the target.
{0, 0, 0},
{0, 1, 0},
{0, params.BlobTxTargetBlobGasPerBlock / params.BlobTxBlobGasPerBlob, 0},
// If the target blob gas is exceeded, the excessBlobGas should increase
// by however much it was overshot
{0, (params.BlobTxTargetBlobGasPerBlock / params.BlobTxBlobGasPerBlob) + 1, params.BlobTxBlobGasPerBlob},
{1, (params.BlobTxTargetBlobGasPerBlock / params.BlobTxBlobGasPerBlob) + 1, params.BlobTxBlobGasPerBlob + 1},
{1, (params.BlobTxTargetBlobGasPerBlock / params.BlobTxBlobGasPerBlob) + 2, 2*params.BlobTxBlobGasPerBlob + 1},
// The excess blob gas should decrease by however much the target was
// under-shot, capped at zero.
{params.BlobTxTargetBlobGasPerBlock, params.BlobTxTargetBlobGasPerBlock / params.BlobTxBlobGasPerBlob, params.BlobTxTargetBlobGasPerBlock},
{params.BlobTxTargetBlobGasPerBlock, (params.BlobTxTargetBlobGasPerBlock / params.BlobTxBlobGasPerBlob) - 1, params.BlobTxBlobGasPerBlob},
{params.BlobTxTargetBlobGasPerBlock, (params.BlobTxTargetBlobGasPerBlock / params.BlobTxBlobGasPerBlob) - 2, 0},
{params.BlobTxBlobGasPerBlob - 1, (params.BlobTxTargetBlobGasPerBlock / params.BlobTxBlobGasPerBlob) - 1, 0},
}
for _, tt := range tests {
result := CalcExcessBlobGas(tt.excess, tt.blobs*params.BlobTxBlobGasPerBlob)
if result != tt.want {
t.Errorf("excess blob gas mismatch: have %v, want %v", result, tt.want)
}
}
}
func TestCalcBlobFee(t *testing.T) {
tests := []struct {
excessBlobGas uint64
blobfee int64
}{
{0, 1},
{1542706, 1},
{1542707, 2},
{10 * 1024 * 1024, 111},
}
for i, tt := range tests {
have := CalcBlobFee(tt.excessBlobGas)
if have.Int64() != tt.blobfee {
t.Errorf("test %d: blobfee mismatch: have %v want %v", i, have, tt.blobfee)
}
}
}
func TestFakeExponential(t *testing.T) {
tests := []struct {
factor int64
numerator int64
denominator int64
want int64
}{
// When numerator == 0 the return value should always equal the value of factor
{1, 0, 1, 1},
{38493, 0, 1000, 38493},
{0, 1234, 2345, 0}, // should be 0
{1, 2, 1, 6}, // approximate 7.389
{1, 4, 2, 6},
{1, 3, 1, 16}, // approximate 20.09
{1, 6, 2, 18},
{1, 4, 1, 49}, // approximate 54.60
{1, 8, 2, 50},
{10, 8, 2, 542}, // approximate 540.598
{11, 8, 2, 596}, // approximate 600.58
{1, 5, 1, 136}, // approximate 148.4
{1, 5, 2, 11}, // approximate 12.18
{2, 5, 2, 23}, // approximate 24.36
{1, 50000000, 2225652, 5709098764},
}
for i, tt := range tests {
f, n, d := big.NewInt(tt.factor), big.NewInt(tt.numerator), big.NewInt(tt.denominator)
original := fmt.Sprintf("%d %d %d", f, n, d)
have := fakeExponential(f, n, d)
if have.Int64() != tt.want {
t.Errorf("test %d: fake exponential mismatch: have %v want %v", i, have, tt.want)
}
later := fmt.Sprintf("%d %d %d", f, n, d)
if original != later {
t.Errorf("test %d: fake exponential modified arguments: have\n%v\nwant\n%v", i, later, original)
}
}
}