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zeekay
e079072877
M-Chain is committee-driven — keygen and signing requests come from validators via consensus, not a user mempool. Attach the fee.NoUserTxPolicy sentinel in Initialize so the boot-time fee.Validate explicitly approves the no-user-tx posture and any caller that reaches the gate gets ErrChainAcceptsNoUserTxs.
36 lines
1.3 KiB
Go
36 lines
1.3 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 thresholdvm
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import (
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"github.com/luxfi/node/vms/types/fee"
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)
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// newFeePolicy returns the canonical M-Chain FeePolicy. M-Chain is a
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// committee-driven service VM — keygen / signing requests come from
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// validators via consensus, not a user mempool — so it declares the
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// NoUserTxPolicy sentinel. See vms/types/fee/policy.go.
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//
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// Any tx that reaches the fee gate on a NoUserTx chain is a wiring
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// bug; ValidateFee returns ErrChainAcceptsNoUserTxs.
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func newFeePolicy() fee.Policy {
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return fee.NoUserTxPolicy{}
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}
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// gateUserTx refuses every caller — M-Chain accepts no user txs.
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// Any service entry that exposes itself as user-callable MUST route
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// through this gate so the refusal is explicit, not implicit.
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func (vm *VM) gateUserTx() error {
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if vm.feePolicy == nil {
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return fee.ErrChainAcceptsNoUserTxs
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}
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// NoUserTxPolicy.ValidateFee ignores the args and always returns
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// ErrChainAcceptsNoUserTxs.
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return vm.feePolicy.ValidateFee(0, fee.NoUserTxPolicy{}.FeeAssetID())
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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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