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P-chain - Memo field zeroed post Durango #2607

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Jan 19, 2024
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18 changes: 18 additions & 0 deletions vms/components/avax/base_tx.go
Original file line number Diff line number Diff line change
Expand Up @@ -65,3 +65,21 @@ func (t *BaseTx) Verify(ctx *snow.Context) error {
return nil
}
}

func VerifyMemoFieldLength(memo types.JSONByteSlice, isDurangoActive bool) error {
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I added a different method rather than extending SyntacticVerify with config and chainTIme. We can revisit this choice down the line, in case other syntactic checks will depend on the specific fork used

if !isDurangoActive {
// SyntacticVerify validates this field pre-Durango
return nil
}

if len(memo) != 0 {
return fmt.Errorf(
"%w: %d > %d",
ErrMemoTooLarge,
len(memo),
0,
)
}

return nil
}
63 changes: 50 additions & 13 deletions vms/platformvm/txs/executor/staker_tx_verification.go
Original file line number Diff line number Diff line change
Expand Up @@ -103,11 +103,16 @@ func verifyAddValidatorTx(
var (
currentTimestamp = chainState.GetTimestamp()
isDurangoActive = backend.Config.IsDurangoActivated(currentTimestamp)
startTime = currentTimestamp
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return nil, err
}

startTime := currentTimestamp
if !isDurangoActive {
startTime = tx.StartTime()
}

duration := tx.EndTime().Sub(startTime)
switch {
case tx.Validator.Wght < backend.Config.MinValidatorStake:
Expand Down Expand Up @@ -194,8 +199,12 @@ func verifyAddSubnetValidatorTx(
var (
currentTimestamp = chainState.GetTimestamp()
isDurangoActive = backend.Config.IsDurangoActivated(currentTimestamp)
startTime = currentTimestamp
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return err
}

startTime := currentTimestamp
if !isDurangoActive {
startTime = tx.StartTime()
}
Expand Down Expand Up @@ -283,6 +292,14 @@ func verifyRemoveSubnetValidatorTx(
return nil, false, err
}

var (
currentTimestamp = chainState.GetTimestamp()
isDurangoActive = backend.Config.IsDurangoActivated(currentTimestamp)
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return nil, false, err
}

isCurrentValidator := true
vdr, err := chainState.GetCurrentValidator(tx.Subnet, tx.NodeID)
if err == database.ErrNotFound {
Expand Down Expand Up @@ -351,8 +368,14 @@ func verifyAddDelegatorTx(
var (
currentTimestamp = chainState.GetTimestamp()
isDurangoActive = backend.Config.IsDurangoActivated(currentTimestamp)
endTime = tx.EndTime()
startTime = currentTimestamp
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return nil, err
}

var (
endTime = tx.EndTime()
startTime = currentTimestamp
)
if !isDurangoActive {
startTime = tx.StartTime()
Expand Down Expand Up @@ -458,15 +481,19 @@ func verifyAddPermissionlessValidatorTx(
return err
}

if !backend.Bootstrapped.Get() {
return nil
}

var (
currentTimestamp = chainState.GetTimestamp()
isDurangoActive = backend.Config.IsDurangoActivated(currentTimestamp)
startTime = currentTimestamp
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return err
}

if !backend.Bootstrapped.Get() {
return nil
}

startTime := currentTimestamp
if !isDurangoActive {
startTime = tx.StartTime()
}
Expand Down Expand Up @@ -578,15 +605,21 @@ func verifyAddPermissionlessDelegatorTx(
return err
}

var (
currentTimestamp = chainState.GetTimestamp()
isDurangoActive = backend.Config.IsDurangoActivated(currentTimestamp)
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return err
}

if !backend.Bootstrapped.Get() {
return nil
}

var (
currentTimestamp = chainState.GetTimestamp()
isDurangoActive = backend.Config.IsDurangoActivated(currentTimestamp)
endTime = tx.EndTime()
startTime = currentTimestamp
endTime = tx.EndTime()
startTime = currentTimestamp
)
if !isDurangoActive {
startTime = tx.StartTime()
Expand Down Expand Up @@ -728,6 +761,10 @@ func verifyTransferSubnetOwnershipTx(
return err
}

if err := avax.VerifyMemoFieldLength(tx.Memo, true /*=isDurangoActive*/); err != nil {
return err
}

if !backend.Bootstrapped.Get() {
// Not bootstrapped yet -- don't need to do full verification.
return nil
Expand Down
6 changes: 4 additions & 2 deletions vms/platformvm/txs/executor/staker_tx_verification_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -139,13 +139,15 @@ func TestVerifyAddPermissionlessValidatorTx(t *testing.T) {
}
},
stateF: func(ctrl *gomock.Controller) state.Chain {
return nil
mockState := state.NewMockChain(ctrl)
mockState.EXPECT().GetTimestamp().Return(now) // chain time is after Durango fork activation since now.After(activeForkTime)
return mockState
},
sTxF: func() *txs.Tx {
return &verifiedSignedTx
},
txF: func() *txs.AddPermissionlessValidatorTx {
return nil
return &txs.AddPermissionlessValidatorTx{}
},
expectedErr: nil,
},
Expand Down
50 changes: 46 additions & 4 deletions vms/platformvm/txs/executor/standard_tx_executor.go
Original file line number Diff line number Diff line change
Expand Up @@ -54,14 +54,21 @@ func (e *StandardTxExecutor) CreateChainTx(tx *txs.CreateChainTx) error {
return err
}

var (
currentTimestamp = e.State.GetTimestamp()
isDurangoActive = e.Config.IsDurangoActivated(currentTimestamp)
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return err
}

baseTxCreds, err := verifyPoASubnetAuthorization(e.Backend, e.State, e.Tx, tx.SubnetID, tx.SubnetAuth)
if err != nil {
return err
}

// Verify the flowcheck
timestamp := e.State.GetTimestamp()
createBlockchainTxFee := e.Config.GetCreateBlockchainTxFee(timestamp)
createBlockchainTxFee := e.Config.GetCreateBlockchainTxFee(currentTimestamp)
if err := e.FlowChecker.VerifySpend(
tx,
e.State,
Expand Down Expand Up @@ -98,9 +105,16 @@ func (e *StandardTxExecutor) CreateSubnetTx(tx *txs.CreateSubnetTx) error {
return err
}

var (
currentTimestamp = e.State.GetTimestamp()
isDurangoActive = e.Config.IsDurangoActivated(currentTimestamp)
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return err
}

// Verify the flowcheck
timestamp := e.State.GetTimestamp()
createSubnetTxFee := e.Config.GetCreateSubnetTxFee(timestamp)
createSubnetTxFee := e.Config.GetCreateSubnetTxFee(currentTimestamp)
if err := e.FlowChecker.VerifySpend(
tx,
e.State,
Expand Down Expand Up @@ -131,6 +145,14 @@ func (e *StandardTxExecutor) ImportTx(tx *txs.ImportTx) error {
return err
}

var (
currentTimestamp = e.State.GetTimestamp()
isDurangoActive = e.Config.IsDurangoActivated(currentTimestamp)
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return err
}

e.Inputs = set.NewSet[ids.ID](len(tx.ImportedInputs))
utxoIDs := make([][]byte, len(tx.ImportedInputs))
for i, in := range tx.ImportedInputs {
Expand Down Expand Up @@ -209,6 +231,14 @@ func (e *StandardTxExecutor) ExportTx(tx *txs.ExportTx) error {
return err
}

var (
currentTimestamp = e.State.GetTimestamp()
isDurangoActive = e.Config.IsDurangoActivated(currentTimestamp)
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return err
}

outs := make([]*avax.TransferableOutput, len(tx.Outs)+len(tx.ExportedOutputs))
copy(outs, tx.Outs)
copy(outs[len(tx.Outs):], tx.ExportedOutputs)
Expand Down Expand Up @@ -386,6 +416,14 @@ func (e *StandardTxExecutor) TransformSubnetTx(tx *txs.TransformSubnetTx) error
return err
}

var (
currentTimestamp = e.State.GetTimestamp()
isDurangoActive = e.Config.IsDurangoActivated(currentTimestamp)
)
if err := avax.VerifyMemoFieldLength(tx.Memo, isDurangoActive); err != nil {
return err
}

// Note: math.MaxInt32 * time.Second < math.MaxInt64 - so this can never
// overflow.
if time.Duration(tx.MaxStakeDuration)*time.Second > e.Backend.Config.MaxStakeDuration {
Expand Down Expand Up @@ -512,6 +550,10 @@ func (e *StandardTxExecutor) BaseTx(tx *txs.BaseTx) error {
return err
}

if err := avax.VerifyMemoFieldLength(tx.Memo, true /*=isDurangoActive*/); err != nil {
return err
}

// Verify the flowcheck
if err := e.FlowChecker.VerifySpend(
tx,
Expand Down
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