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zeekayandHanzo Dev
5c72db8860
Flip the Q-Chain fee gate from FlatPolicy (user-fee metering) to the committee-only fee.NoUserTxPolicy sentinel. Finality-cert inclusion is a validator obligation paid via P-Chain reward distribution; a fee market on Q would make finality hostage to blockspace pricing — the exact failure mode LP-0130 §6 eliminates. Consensus-internal cert aggregation reaches txPool.AddTransaction directly and is unaffected. Tests updated: policy is the NoUserTxPolicy sentinel and IssueTx refuses every user tx (zero-fee, floor-fee, and 1000x floor) with ErrChainAcceptsNoUserTxs. go test ./quantumvm/ passes; build + vet clean. Closes the top divergence from the 2026-07-03 LP-vs-code audit. Co-authored-by: Hanzo Dev <[email protected]>
45 lines
1.5 KiB
Go
45 lines
1.5 KiB
Go
// Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package quantumvm
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import (
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"fmt"
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"github.com/luxfi/ids"
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"github.com/luxfi/node/vms/types/fee"
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)
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// newFeePolicy returns the canonical Q-Chain FeePolicy. Per LP-0130 §6,
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// Q-Chain has NO user-payable blockspace: finality-cert inclusion is a
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// validator obligation paid via P-Chain reward distribution, never a
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// user fee. A fee market on Q would make finality hostage to blockspace
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// pricing (the exact failure mode LP-0130 §6 eliminates), so the policy
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// is the explicit committee-only sentinel.
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func newFeePolicy(uint32) fee.Policy {
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return fee.NoUserTxPolicy{}
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}
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// gateUserTx refuses every user-submitted tx: Q-Chain state advances
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// only through consensus-internal cert aggregation, which reaches
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// txPool.AddTransaction directly and bypasses this gate.
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func (vm *VM) gateUserTx(tx Transaction) error {
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if vm.feePolicy == nil {
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return fmt.Errorf("quantumvm: fee policy not initialized")
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}
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return vm.feePolicy.ValidateFee(tx.Fee(), ids.Empty)
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}
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// IssueTx is the user-tx admission point on Q-Chain. Under
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// NoUserTxPolicy it structurally refuses all user txs (LP-0130 §6).
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func (vm *VM) IssueTx(tx Transaction) error {
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if err := vm.gateUserTx(tx); err != nil {
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return err
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}
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return vm.txPool.AddTransaction(tx)
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}
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// FeePolicy exposes the chain's declared fee policy for diagnostics
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// and the boot-time Validate gate.
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func (vm *VM) FeePolicy() fee.Policy { return vm.feePolicy }
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