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zeekay
a3f3cc563a
K-Chain's mutating service RPCs (CreateKey, DeleteKey, Encrypt) are the user-tx admission points. Attach a FlatPolicy at MinTxFeeFloor in Initialize and add a Fee uint64 field to each mutating Args struct. The fee gate runs before any key material is allocated or MPC capacity consumed. Read-only RPCs (ListKeys, GetKey*) are unchanged — they consume no chain state.
41 lines
1.3 KiB
Go
41 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 keyvm
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import (
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"fmt"
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"github.com/luxfi/constants"
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"github.com/luxfi/node/vms/types/fee"
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)
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// newFeePolicy returns the canonical K-Chain FeePolicy. K-Chain accepts
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// user-submitted mutating RPCs (CreateKey, DeleteKey, Encrypt) that
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// produce on-chain effects, so it MUST charge a non-zero floor; see
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// vms/types/fee/policy.go.
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func newFeePolicy(networkID uint32) fee.Policy {
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return fee.FlatPolicy{
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Fee: fee.MinTxFeeFloor,
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AssetID: constants.UTXOAssetIDFor(networkID),
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}
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}
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// gateUserFee refuses paidFee < MinTxFeeFloor. Called from each
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// mutating service RPC (CreateKey, DeleteKey, Encrypt) before the
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// state-modifying VM method runs.
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//
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// Read-only RPCs (ListKeys, GetKey*) are not gated — they consume no
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// chain state and produce no on-chain effects.
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func (vm *VM) gateUserFee(paidFee uint64) error {
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if vm.feePolicy == nil {
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return fmt.Errorf("keyvm: fee policy not initialized")
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}
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asset := constants.UTXOAssetIDFor(vm.networkID)
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return vm.feePolicy.ValidateFee(paidFee, asset)
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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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