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zeekay
a93f6e3dec
A plugin is its own binary; the daemon that loads it has no business being linked into it. Twelve VMs reached into github.com/luxfi/node for four things, and each one now programs against a home that is actually its own: - fee admission (Policy, FlatPolicy, NoUserTxPolicy, Validate) joins the settlement half already in chains/fee. One fee package, and the nodefee alias that marked the split is gone. - the cross-chain artifact types move to chains/artifacts. - the factory the daemon registers is luxfi/vm/manager.Factory, and the version types are luxfi/version. Both are ordinary modules the daemon reads too, so a VM imports them directly rather than through anything of ours. The GPU switch is deleted, not moved. It was a global set during daemon startup that a separate process could never observe, so every plugin read its default; FHEOptions.Backend is the switch that was really there. go list -deps names no luxfi/node for aivm, bridgevm, dexvm, evm, fhevm, graphvm, identityvm, keyvm, mpcvm, quantumvm, schain or zkvm, and the built plugin binaries carry no such string. oraclevm and relayvm still do: they are re-export shims over luxfi/oracle and luxfi/relay, which build their fee policies upstream. Their tests keep naming the daemon's fee package because that is the type their value has.
48 lines
2.0 KiB
Go
48 lines
2.0 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 mpcvm
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import (
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"github.com/luxfi/constants"
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"github.com/luxfi/log"
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"github.com/luxfi/vm/manager"
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)
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var _ manager.Factory = (*Factory)(nil)
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// VMID identifies M-Chain: MPC threshold signing and bridge custody of external
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// wallets (LP-7100). It is constants.MPCVMID and nothing else.
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//
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// A vmID is an immutable one-way door: it is baked into the CreateChainTx at
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// genesis, it is the plugin binary's filename, and it is what the P-Chain stores
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// forever. Every declaration of it must agree, so there is exactly one — this
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// alias — and it points at the single source of truth in luxfi/constants.
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//
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// This VM previously declared a private `thresholdvm` literal here that matched
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// no other declaration in the stack. Per LP-7050 the thresholdvm package was
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// split into mpcvm (M-Chain) and fhevm (F-Chain); "ThresholdVM" and "mvm" are
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// stale names. constants.MPCVMID, node/genesis/builder/registry.go and
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// node/node/vms.go all say mpcvm.
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var VMID = constants.MPCVMID
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// The value is held by TestVMID_Bytes and TestVMID_IsCanonicalAndStable, which
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// compare it to the literal bytes and to the CB58 the plugin binary is named
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// after.
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//
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// It used to also carry `var _ = map[bool]struct{}{VMID == ids.ID{...}: {}}`,
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// labelled a compile-time assertion. It is not one: a map literal with a
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// single non-constant key compiles whatever the key evaluates to — only a
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// DUPLICATE constant key is a compile error. So it held for every possible
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// value of VMID, including a wrong one, while reading as proof. A check that
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// cannot fail is worse than no check, because it stops anyone writing the one
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// that can.
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// Factory creates M-Chain VM instances.
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type Factory struct{}
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// New returns a new M-Chain VM. Everything that needs configuration or a
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// database is set up in Initialize; a Factory-built VM holds no state.
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func (f *Factory) New(log.Logger) (interface{}, error) {
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return &VM{}, nil
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}
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