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core/state: add testcase for handling of burned balances

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Martin Holst Swende 2024-10-18 10:57:56 +02:00
parent ccaab0ae10
commit 4de4fa4b60
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1 changed files with 51 additions and 0 deletions
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51
core/state/statedb_test.go
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@ -22,6 +22,7 @@ import (
"fmt"
"maps"
"math"
"math/big"
"math/rand"
"reflect"
"slices"
@ -1377,3 +1378,53 @@ func TestStorageDirtiness(t *testing.T) {
state.RevertToSnapshot(snap)
checkDirty(common.Hash{0x1}, common.Hash{0x1}, true)
}
// This method tests that the 'burn' from sending-to-selfdestructed accounts
// is accounted for.
// (There is also a higher-level test in eth/tracers: TestSupplySelfDestruct )
func TestBurn(t *testing.T) {
// Note: burn can happen even after EIP-6780, if within one single transaction,
// the following occur:
// 1. contract B creates contract A
// 2. contract A is destructed
// 3. constract B sends ether to A
var burned = new(uint256.Int)
s, _ := New(types.EmptyRootHash, NewDatabaseForTesting())
sdblog := newStateDBLogger(s, &tracing.Hooks{
OnBalanceChange: func(addr common.Address, prev, new *big.Int, reason tracing.BalanceChangeReason) {
if reason == tracing.BalanceDecreaseSelfdestructBurn {
burned.Add(burned, uint256.MustFromBig(prev))
}
},
})
createAndDestroy := func(addr common.Address) {
sdblog.AddBalance(addr, uint256.NewInt(100), tracing.BalanceChangeUnspecified)
sdblog.CreateContract(addr)
sdblog.SelfDestruct(addr)
// sanity-check that balance is now 0
if have, want := sdblog.GetBalance(addr), new(uint256.Int); !have.Eq(want) {
t.Fatalf("post-destruct balance wrong: have %v want %v", have, want)
}
}
addA := common.Address{0xaa}
addB := common.Address{0xbb}
addC := common.Address{0xcc}
// Tx 1: create and destroy address A and B in one tx
createAndDestroy(addA)
createAndDestroy(addB)
sdblog.AddBalance(addA, uint256.NewInt(200), tracing.BalanceChangeUnspecified)
sdblog.AddBalance(addB, uint256.NewInt(200), tracing.BalanceChangeUnspecified)
sdblog.Finalise(true)
// Tx 2: create and destroy address C, then commit
createAndDestroy(addC)
sdblog.AddBalance(addC, uint256.NewInt(200), tracing.BalanceChangeUnspecified)
sdblog.Finalise(true)
s.Commit(0, false)
if have, want := burned, uint256.NewInt(600); !have.Eq(want) {
t.Fatalf("burn-count wrong, have %v want %v", have, want)
}
}