chains: rename thresholdvm → mpcvm (LP-134 T-Chain retirement finished)

Under LP-0130's canonical roster, chains/thresholdvm/ hosts the M-Chain
VM (MPC threshold signing). The package name "thresholdvm" was the last
piece of T-Chain nomenclature still shipping in code — legacy from the
pre-LP-134 shared-substrate design. Renamed to mpcvm/ so the package
name matches the M-Chain letter and LP-7100 spec.

- chains/thresholdvm/ → chains/mpcvm/ (dir + inner files + package decl)
- Sed-replace thresholdvm → mpcvm across .go / .md / .yml / .json / .sh
- Fee/settlement primitive references now say mpcvm
- LLM.md canonical chain roster (LP-0130) already points at mpcvm/

F-Chain runtime pieces (fhe/, protocol/tfhe_keygen/,
runtime/f_chain_adapter.go) stay under mpcvm/ for now — they consume
the same shared threshold primitives. A follow-up extract to
chains/fhevm/ can happen once F-Chain runtime graduates.

Co-authored-by: Hanzo Dev <dev@hanzo.ai>

.github/images.json

@@ -10,6 +10,6 @@
   {"vm": "oraclevm",     "image": "ghcr.io/luxfi/chains/oraclevm",     "cgo": "0"},
   {"vm": "quantumvm",    "image": "ghcr.io/luxfi/chains/quantumvm",    "cgo": "0"},
   {"vm": "relayvm",      "image": "ghcr.io/luxfi/chains/relayvm",      "cgo": "0"},
-  {"vm": "thresholdvm",  "image": "ghcr.io/luxfi/chains/thresholdvm",  "cgo": "0"},
+  {"vm": "mpcvm",  "image": "ghcr.io/luxfi/chains/mpcvm",  "cgo": "0"},
   {"vm": "zkvm",         "image": "ghcr.io/luxfi/chains/zkvm",         "cgo": "0"}
 ]

LLM.md

@@ -34,8 +34,8 @@ domain-execution chain that MUST consume UTXO settlement via the
 | `zkvm/` | **Z** | Rollup / private commitment + nullifier. Shielded supply is an X-escrow wrapper (LP-0130 §2, I-5) | LP-8000 |
 | `aivm/` | **A** | Inference receipt + attestation. Rides B's settlement engine (LP-0130 §9) | LP-5000 |
 | `bridgevm/` | **B** | Cross-chain message lifecycle. Fees deducted from bridged amount (LP-0130 §8) | LP-6000 |
-| `thresholdvm/` | **M** | MPC signing / custody. Service fees paid by originating chain (LP-0130 §7); no user M-balance | LP-7100 |
-| `thresholdvm/fhe/` | **F** | FHE runtime. Encrypted supply reconciles to X-escrow (LP-0130 §2, I-5) | LP-8200 |
+| `mpcvm/` | **M** | MPC signing / custody. Service fees paid by originating chain (LP-0130 §7); no user M-balance | LP-7100 |
+| `mpcvm/fhe/` | **F** | FHE runtime. Encrypted supply reconciles to X-escrow (LP-0130 §2, I-5) | LP-8200 |
 
 **Service VMs** (not canonical primary chains under LP-0130):
 

PLUGGABLE.md

@@ -12,8 +12,8 @@ operator daemons (no luxd validator required), the same way `mpcd` and
 |---|---|---|---|
 | R-Chain (relay) | `chains/relayvm/` (shim) | `luxfi/relay/vm/` | `luxfi/relay/cmd/relayd` |
 | O-Chain (oracle) | `chains/oraclevm/` (shim) | `luxfi/oracle/vm/` | `luxfi/oracle/cmd/oracled` |
-| M-Chain (MPC threshold) | `luxfi/chains/thresholdvm/` (canonical, MPC mode) | (same) | n/a — runs in luxd |
-| F-Chain (FHE) | `luxfi/chains/thresholdvm/` (canonical, FHE mode) | (same) | `luxfi/fhe/cmd/fhed` (standalone FHE daemon) |
+| M-Chain (MPC threshold) | `luxfi/chains/mpcvm/` (canonical, MPC mode) | (same) | n/a — runs in luxd |
+| F-Chain (FHE) | `luxfi/chains/mpcvm/` (canonical, FHE mode) | (same) | `luxfi/fhe/cmd/fhed` (standalone FHE daemon) |
 | C-Chain (EVM) | `chains/evm/` | uses `chains/evm/cevm` (C++/GPU FFI shim) or pure-Go (default) via build tags | n/a — runs in luxd |
 | A-Chain (AI) | `chains/aivm/` | `luxfi/ai` | n/a |
 | I-Chain (identity) | `chains/identityvm/` | `luxfi/id` | n/a |

README.md

@@ -39,6 +39,6 @@ Or copy binaries to `~/.lux/plugins/<vmid>`.
 | relayvm | R-Chain | Cross-chain relay |
 | servicenodevm | S-Chain | Service node registry |
 | teleportvm | T-Chain | Unified teleport (bridge + relay + oracle) |
-| thresholdvm (MPC) | M-Chain | MPC ceremonies (CGGMP21, FROST, Pulsar-general) — bridge custody for external wallets |
-| thresholdvm (FHE) | F-Chain | FHE compute + TFHE bootstrap-key generation (encrypted EVM) |
+| mpcvm (MPC) | M-Chain | MPC ceremonies (CGGMP21, FROST, Pulsar-general) — bridge custody for external wallets |
+| mpcvm (FHE) | F-Chain | FHE compute + TFHE bootstrap-key generation (encrypted EVM) |
 | zkvm | Z-Chain | Groth16 over BLS12-381 (rolls N × ML-DSA-65 sigs into 192-byte proof) |

internal/warpmsg/warpmsg.go

@@ -5,7 +5,7 @@
 // signs, and wraps a single-signer Warp message.
 //
 // Every VM that emits a cross-chain Warp message — bridgevm reshare gossip,
-// zkvm FHE task callbacks, thresholdvm decryption fulfillments — calls
+// zkvm FHE task callbacks, mpcvm decryption fulfillments — calls
 // BuildSigned. The build→sign→wrap sequence lives here and nowhere else, so
 // there is exactly one way to turn (networkID, sourceChainID, payload) into a
 // transmittable signed Warp envelope.

mpcvm/DESIGN.md

@@ -11,7 +11,7 @@ flowchart LR
     Stake[Validator stake + delegation]
   end
 
-  subgraph Substrate["thresholdvm (library, this repo)"]
+  subgraph Substrate["mpcvm (library, this repo)"]
     SM[Ceremony state machine]
     Share[Share envelope: offset/len]
     Lane[QuasarCertLane registration]
@@ -228,7 +228,7 @@ or boot-time failure, not a silent semantic bug.
 
 Per LP-134 (Lux Chain Topology) and LP-7050 (Supersession Map), T-Chain is
 fully removed. Its threshold concerns decompose onto two chains that import
-this same `thresholdvm` **library** substrate in process:
+this same `mpcvm` **library** substrate in process:
 
 - **M-Chain** (`mpcvm`, LP-7100) — CGGMP21, FROST, Pulsar-general threshold
   signing for bridge custody. Owns all threshold signing.

mpcvm/LLM.md

@@ -1,4 +1,4 @@
-# LLM context — `chains/thresholdvm/`
+# LLM context — `chains/mpcvm/`
 
 ## What this is
 
@@ -16,7 +16,7 @@ shared by both chains.
 - Do **not** turn this back into a chain. No `factory.go` exposed to
   `chains.Manager`. No new VM ID. M-Chain and F-Chain are the chains.
 - Do **not** import M-Chain or F-Chain code from this package. The
-  dependency graph is `mchain → thresholdvm` and `fchain → thresholdvm`;
+  dependency graph is `mchain → mpcvm` and `fchain → mpcvm`;
   reverse edges are forbidden.
 - Do **not** add a protocol implementation here. Protocol packages
   expose **interfaces only**; impls live in the chain that runs the

mpcvm/README.md

@@ -12,7 +12,7 @@ chains, each of which consumes this library substrate:
 - **F-Chain** (`fhevm`, LP-8200) — TFHE keygen, encrypted EVM, threshold
   decrypt, confidential compute. Owns *all* encrypted computation.
 
-`chains/thresholdvm/` is the shared **library** these two chains import in
+`chains/mpcvm/` is the shared **library** these two chains import in
 process — it is not itself a chain and has no genesis, no validators, no
 block production. There is **no** `teleportvm` and **no** "T-Chain": teleport
 IS `bridgevm` (B-Chain, LP-6000). Any live identifier still naming "T-Chain",
@@ -99,7 +99,7 @@ in `runtime/`.
 
 ## Migration from T-Chain
 
-LP-5013 is deprecated. The legacy chain at `chains/thresholdvm/` (this
+LP-5013 is deprecated. The legacy chain at `chains/mpcvm/` (this
 directory's `vm.go`, `block.go`, `factory.go`, `fhe/`, `cmd/`) hosts
 the migration shims that route legacy `TChain*` cert lanes to the
 appropriate `MChain*` / `FChain*` verifiers during the one-epoch grace

mpcvm/backend.go

@@ -3,7 +3,7 @@
 
 //go:build cgo
 
-package thresholdvm
+package mpcvm
 
 // dlopen probe for the MPCVM GPU plugin. Runs once at package init() and
 // pins the resolved GPUBackend into the gpuBackend singleton. Probe order
@@ -18,7 +18,7 @@ package thresholdvm
 // search path: $DYLD_LIBRARY_PATH, $LD_LIBRARY_PATH, system dirs).
 //
 // The probe is intentionally silent on failure: a host with no GPU still
-// boots; thresholdvm just runs on the CPU reference (the existing
+// boots; mpcvm just runs on the CPU reference (the existing
 // protocol/, factory.go, executor.go state machine, unchanged by this
 // bridge).
 

mpcvm/block.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"context"

mpcvm/cert/lane.go

@@ -15,7 +15,7 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/luxfi/chains/thresholdvm/types"
+	"github.com/luxfi/chains/mpcvm/types"
 )
 
 // LaneVerifier is the contract a chain implements to validate shares

mpcvm/cert/lane_test.go

@@ -7,7 +7,7 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/luxfi/chains/thresholdvm/types"
+	"github.com/luxfi/chains/mpcvm/types"
 )
 
 type stubVerifier struct{ lane types.CertLane }

mpcvm/client.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"bytes"
@@ -15,7 +15,7 @@ import (
 	"time"
 )
 
-// Client provides access to thresholdvm services. Per LP-134, this serves
+// Client provides access to mpcvm services. Per LP-134, this serves
 // M-Chain (MPC mode) and F-Chain (FHE mode); legacy T-Chain MPC routes here.
 type Client struct {
 	endpoint   string
@@ -544,7 +544,7 @@ func (c *Client) Health(ctx context.Context) (map[string]interface{}, error) {
 	return result, nil
 }
 
-// IsReady checks if thresholdvm (M-Chain MPC mode per LP-134) is ready
+// IsReady checks if mpcvm (M-Chain MPC mode per LP-134) is ready
 func (c *Client) IsReady(ctx context.Context) (bool, error) {
 	info, err := c.GetInfo(ctx)
 	if err != nil {

mpcvm/cmd/plugin/main.go

@@ -9,7 +9,7 @@ import (
 	"os"
 
 	"github.com/luxfi/log"
-	"github.com/luxfi/chains/thresholdvm"
+	"github.com/luxfi/chains/mpcvm"
 	"github.com/luxfi/sys/ulimit"
 	"github.com/luxfi/vm/chain"
 	"github.com/luxfi/vm/rpc"
@@ -26,7 +26,7 @@ func main() {
 		os.Exit(1)
 	}
 
-	f := &thresholdvm.Factory{}
+	f := &mpcvm.Factory{}
 	raw, err := f.New(log.Root())
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "factory error: %s\n", err)

mpcvm/codec.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"github.com/luxfi/node/vms/pcodecs"

mpcvm/docs/ARCHITECTURE.md

@@ -29,7 +29,7 @@ both chains' binaries.
             +----------+---------------+
                        |
               +--------v---------+
-              |   thresholdvm    |
+              |   mpcvm    |
               |  (this library)  |
               |                  |
               | types/           |

mpcvm/docs/M_CHAIN_INTEGRATION.md

@@ -1,7 +1,7 @@
 # M-Chain Integration
 
 This document describes how `chains/mchain/` plugs into the
-`thresholdvm` substrate when running in **MPC mode** (per LP-134).
+`mpcvm` substrate when running in **MPC mode** (per LP-134).
 The same substrate, running in FHE mode, serves F-Chain — see
 `F_CHAIN_INTEGRATION.md` for that side. The legacy "T-Chain" name is
 removed entirely: teleport IS `bridgevm` (B-Chain, LP-6000), there is no `teleportvm` (LP-6332 superseded by LP-6000 per LP-7050).

mpcvm/executor.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"context"

mpcvm/factory.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"github.com/luxfi/ids"

mpcvm/feegate.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"github.com/luxfi/node/vms/types/fee"

mpcvm/feegate_test.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"errors"

mpcvm/mpcvm_gpu.go

@@ -3,14 +3,14 @@
 
 //go:build cgo
 
-package thresholdvm
+package mpcvm
 
 // GPU bridge — dlopen + dlsym substrate for the MPCVM state-machine kernels.
 //
 // This file binds Go to the host launchers exported by the per-backend GPU
 // plugins in the lux GPU plugin backends/<X>/. Unlike the cevm bridge
 // which links statically through pkg-config (libevm + libevm-gpu), the
-// thresholdvm bridge is a runtime overlay: zero compile-time dependency on
+// mpcvm bridge is a runtime overlay: zero compile-time dependency on
 // the plugin, no pkg-config, no link-time resolution. Either the dlopen
 // succeeds at init() and GPUBackend is populated, or it doesn't and
 // callers fall back to the CPU reference (the Go state machine in
@@ -212,7 +212,7 @@ import (
 // resolved at init() time. Callers check this to fall back to the CPU
 // reference (the protocol/ + executor.go state machine, which is unchanged
 // by this bridge).
-var ErrGPUNotAvailable = errors.New("thresholdvm: GPU backend not available (no plugin dlopened)")
+var ErrGPUNotAvailable = errors.New("mpcvm: GPU backend not available (no plugin dlopened)")
 
 // GPUBackendKind is the resolved plugin family. Matches the dlopen probe
 // order in backend.go: cuda → hip → metal → vulkan → webgpu.
@@ -419,7 +419,7 @@ func assertSizes() {
 	for _, c := range checks {
 		if int(c.got) != c.want {
 			panic(fmt.Sprintf(
-				"thresholdvm: GPU layout mismatch — %s sizeof=%d want=%d. "+
+				"mpcvm: GPU layout mismatch — %s sizeof=%d want=%d. "+
 					"Rebuild gpu-kernels (ops/mpcvm/cuda/mpcvm_kernels_common.cuh) "+
 					"or update the Go struct.", c.name, c.got, c.want))
 		}
@@ -507,7 +507,7 @@ func (g *GPUBackend) CeremonyApply(
 		return 0, ErrGPUNotAvailable
 	}
 	if desc == nil || len(ceremonies) == 0 {
-		return 0, fmt.Errorf("thresholdvm.CeremonyApply: nil desc or empty ceremonies")
+		return 0, fmt.Errorf("mpcvm.CeremonyApply: nil desc or empty ceremonies")
 	}
 	var (
 		ceremonyApplied     uint32
@@ -543,7 +543,7 @@ func (g *GPUBackend) CeremonyApply(
 	runtime.KeepAlive(emptyContribOps)
 	runtime.KeepAlive(emptyContributions)
 	if rc != 0 {
-		return 0, fmt.Errorf("thresholdvm.CeremonyApply: launcher rc=%d", int(rc))
+		return 0, fmt.Errorf("mpcvm.CeremonyApply: launcher rc=%d", int(rc))
 	}
 	return ceremonyApplied, nil
 }
@@ -568,7 +568,7 @@ func (g *GPUBackend) KeyShareApply(
 	}
 	if desc == nil || len(ceremonies) == 0 ||
 		len(keyShares) == 0 || len(contributions) == 0 {
-		return 0, 0, 0, fmt.Errorf("thresholdvm.KeyShareApply: nil desc or empty arena")
+		return 0, 0, 0, fmt.Errorf("mpcvm.KeyShareApply: nil desc or empty arena")
 	}
 	rc := C.call_ceremony_sweep(
 		g.fnCeremonySweep,
@@ -590,7 +590,7 @@ func (g *GPUBackend) KeyShareApply(
 	runtime.KeepAlive(keyShares)
 	runtime.KeepAlive(contributions)
 	if rc != 0 {
-		return 0, 0, 0, fmt.Errorf("thresholdvm.KeyShareApply: launcher rc=%d", int(rc))
+		return 0, 0, 0, fmt.Errorf("mpcvm.KeyShareApply: launcher rc=%d", int(rc))
 	}
 	return roundAdvance, finalized, failed, nil
 }
@@ -611,7 +611,7 @@ func (g *GPUBackend) ContributionApply(
 		return 0, ErrGPUNotAvailable
 	}
 	if desc == nil || len(ceremonies) == 0 || len(contributions) == 0 {
-		return 0, fmt.Errorf("thresholdvm.ContributionApply: nil desc or empty arena")
+		return 0, fmt.Errorf("mpcvm.ContributionApply: nil desc or empty arena")
 	}
 	var (
 		ceremonyApplied     uint32
@@ -644,7 +644,7 @@ func (g *GPUBackend) ContributionApply(
 	runtime.KeepAlive(ceremonies)
 	runtime.KeepAlive(contributions)
 	if rc != 0 {
-		return 0, fmt.Errorf("thresholdvm.ContributionApply: launcher rc=%d", int(rc))
+		return 0, fmt.Errorf("mpcvm.ContributionApply: launcher rc=%d", int(rc))
 	}
 	return contributionApplied, nil
 }
@@ -668,12 +668,12 @@ func (g *GPUBackend) MPCTransition(
 		return nil, ErrGPUNotAvailable
 	}
 	if g.fnComputeLeaves == nil || g.fnComposeRoot == nil {
-		return nil, fmt.Errorf("thresholdvm.MPCTransition: %w (compute_leaves or compose_root missing)",
+		return nil, fmt.Errorf("mpcvm.MPCTransition: %w (compute_leaves or compose_root missing)",
 			ErrGPUNotAvailable)
 	}
 	if desc == nil || state == nil ||
 		len(ceremonies) == 0 || len(keyShares) == 0 || len(contributions) == 0 {
-		return nil, fmt.Errorf("thresholdvm.MPCTransition: nil desc/state or empty arena")
+		return nil, fmt.Errorf("mpcvm.MPCTransition: nil desc/state or empty arena")
 	}
 
 	// Scratch buffers consumed by compute_leaves and feeding compose_root.
@@ -709,7 +709,7 @@ func (g *GPUBackend) MPCTransition(
 		nil,
 	)
 	if rc != 0 {
-		return nil, fmt.Errorf("thresholdvm.MPCTransition compute_leaves: launcher rc=%d", int(rc))
+		return nil, fmt.Errorf("mpcvm.MPCTransition compute_leaves: launcher rc=%d", int(rc))
 	}
 
 	rc = C.call_compose_root(
@@ -744,7 +744,7 @@ func (g *GPUBackend) MPCTransition(
 	runtime.KeepAlive(shareMask)
 	runtime.KeepAlive(contributionMask)
 	if rc != 0 {
-		return nil, fmt.Errorf("thresholdvm.MPCTransition compose_root: launcher rc=%d", int(rc))
+		return nil, fmt.Errorf("mpcvm.MPCTransition compose_root: launcher rc=%d", int(rc))
 	}
 	return &result, nil
 }

mpcvm/mpcvm_gpu_nocgo.go

@@ -3,17 +3,17 @@
 
 //go:build !cgo
 
-package thresholdvm
+package mpcvm
 
 import "errors"
 
 // ErrGPUNotAvailable is returned by GPUBackend methods when the build was
-// produced without CGo. The thresholdvm GPU substrate is a runtime overlay
+// produced without CGo. The mpcvm GPU substrate is a runtime overlay
 // that requires dlopen()/dlsym() — under !cgo there is no way to reach the
 // host launchers, so every method on GPUBackend short-circuits to this
 // error and callers fall back to the CPU reference (the Go state machine
 // in protocol/, factory.go, executor.go — unchanged).
-var ErrGPUNotAvailable = errors.New("thresholdvm: GPU backend not available (built without CGo)")
+var ErrGPUNotAvailable = errors.New("mpcvm: GPU backend not available (built without CGo)")
 
 // GPUBackendKind mirrors the cgo variant so the package surface is
 // identical regardless of build mode. Under nocgo every value is None.

mpcvm/mpcvm_gpu_test.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2026, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"errors"

mpcvm/protocol/cggmp21/cggmp21.go

@@ -12,7 +12,7 @@ package cggmp21
 import (
 	"context"
 
-	"github.com/luxfi/chains/thresholdvm/types"
+	"github.com/luxfi/chains/mpcvm/types"
 )
 
 // Verifier validates a CGGMP21 share payload. It is registered into

mpcvm/protocol/corona_general/corona.go

@@ -16,7 +16,7 @@ package corona_general
 import (
 	"context"
 
-	"github.com/luxfi/chains/thresholdvm/types"
+	"github.com/luxfi/chains/mpcvm/types"
 )
 
 // Verifier validates Corona-general share payloads. Registered as

mpcvm/protocol/frost/frost.go

@@ -11,7 +11,7 @@ package frost
 import (
 	"context"
 
-	"github.com/luxfi/chains/thresholdvm/types"
+	"github.com/luxfi/chains/mpcvm/types"
 )
 
 // Verifier validates FROST share payloads. Registered as the

mpcvm/protocol/tfhe_keygen/tfhe.go

@@ -20,7 +20,7 @@ package tfhe_keygen
 import (
 	"context"
 
-	"github.com/luxfi/chains/thresholdvm/types"
+	"github.com/luxfi/chains/mpcvm/types"
 )
 
 // Producer is implemented by M-Chain. It runs the MPC ceremony that

mpcvm/protocol_executor_test.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"context"

mpcvm/protocols.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"context"

mpcvm/rpc.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import (
 	"encoding/hex"

mpcvm/runtime/f_chain_adapter.go

@@ -6,8 +6,8 @@ package runtime
 import (
 	"context"
 
-	"github.com/luxfi/chains/thresholdvm/cert"
-	"github.com/luxfi/chains/thresholdvm/types"
+	"github.com/luxfi/chains/mpcvm/cert"
+	"github.com/luxfi/chains/mpcvm/types"
 )
 
 // FChainAdapter is the contract F-Chain implements. Same state

mpcvm/runtime/m_chain_adapter.go

@@ -15,8 +15,8 @@ package runtime
 import (
 	"context"
 
-	"github.com/luxfi/chains/thresholdvm/cert"
-	"github.com/luxfi/chains/thresholdvm/types"
+	"github.com/luxfi/chains/mpcvm/cert"
+	"github.com/luxfi/chains/mpcvm/types"
 )
 
 // MChainAdapter is the contract M-Chain implements. The substrate

mpcvm/service.go

@@ -29,8 +29,8 @@
 //     ThresholdService key/decryption committees; owns FHE jobs and
 //     threshold-decrypt. This is F-Chain's surface (LP-8200).
 //
-// thresholdvm itself remains a LIBRARY: there is no T-Chain, no teleportvm.
-package thresholdvm
+// mpcvm itself remains a LIBRARY: there is no T-Chain, no teleportvm.
+package mpcvm
 
 import "github.com/luxfi/threshold/pkg/party"
 

mpcvm/service_test.go

@@ -1,7 +1,7 @@
 // Copyright (C) 2019-2026, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-package thresholdvm
+package mpcvm
 
 import "testing"
 

mpcvm/vm.go

@@ -1,14 +1,14 @@
 // Copyright (C) 2019-2025, Lux Industries Inc. All rights reserved.
 // See the file LICENSE for licensing terms.
 
-// Package thresholdvm implements the shared threshold VM substrate — a LIBRARY,
+// Package mpcvm implements the shared threshold VM substrate — a LIBRARY,
 // not a chain — consumed by M-Chain (MPC: CGGMP21/FROST/Pulsar-general threshold
 // signing for bridge custody of external wallets, LP-7100) and F-Chain (FHE:
 // TFHE compute / threshold decrypt, LP-8200). Per LP-134 / LP-7050 there is NO
 // T-Chain and NO teleportvm; teleport IS bridgevm (B-Chain, LP-6000). Any live
 // identifier still naming "T-Chain" or "ThresholdVM-as-a-chain" is stale.
 // See ../README.md.
-package thresholdvm
+package mpcvm
 
 import (
 	"context"
@@ -250,7 +250,7 @@ func (vm *VM) Initialize(
 	// fee.Validate passes for the sentinel even with zero MinTxFee.
 	vm.feePolicy = newFeePolicy()
 	if err := fee.Validate(vm.feePolicy); err != nil {
-		return fmt.Errorf("thresholdvm: fee policy: %w", err)
+		return fmt.Errorf("mpcvm: fee policy: %w", err)
 	}
 
 	// Parse configuration