Multi-Party Agent Wallet

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name: mpa-wallet description: > Operate and automate threshold multisignature workflows for MPC/MPA wallets on an isolated, dedicated host that contains no unrelated sensitive data or private keys. version: 1.0.12 metadata: openclaw: requires: env: - KEYGEN_ID - AUTH_KEY_PATH - MPA_PATH - MPC_CONFIG_PATH - MPC_AUTH_URL - MANAGEMENT_PORT bins: - curl - jq - forge - cast - python3 - pip3 config: - "$AUTH_KEY_PATH/mpc_auth_ed25519" - "$MPC_CONFIG_PATH/configs.yaml" - "$MPA_PATH/.env" primaryEnv: MPC_AUTH_URL os: - linux homepage: https://clawhub.ai/patrickcure/mpa-wallet

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Skill: MPA / MPC wallet agent (OpenClaw / Clawhub)

Use this skill when operating an AI agent (e.g. OpenClaw) that manages an mpc-auth node participating in a Multi-Party Agent (MPA) wallet: a single on-chain address (EVM today) whose MPC signature requires cooperation of **at least threshold+1 nodes in a Group**. No single node holds the full private key.

Examples of usage

Here are some examples of what a user can say to their AI agent

Create a new KeyGen using the Group with all the nodes and tell me its Ethereum address.

Use this KeyGen from now on.

I have added a little ETH to the new Ethereum address on Linea. Please register it.

Add the chain Linea mainnet to my node.

I added some ETH and USDC to my new Ethereum address on Arbitrum mainnet. Please add

the ERC20 Asset USDC contract 0xaf88d065e77c8cC2239327C5EDb3A432268e5831 with decimals 6 on Arbitrum.

Add Arbitrum mainnet to my chain config

Add a new contact Fred with address 0xf33c74Ee25061966efC645BF2244F6EB0a492511

Send Fred 100 USDC on Arbitrum

Send Fred 1 ETH

Prerequisites

This skill assumes the **operator has already provisioned an MPA wallet environment** in ContinuumDAO terms—not a single standalone node:

At least two mpc-auth nodes must exist: one run by a human and one run

for the AI agent. Threshold signing requires multiple parties; a minimal useful setup pairs a human-controlled node with an agent-controlled node.

The agent’s node must use Ed25519 management signing so automated

POST calls to the management API are authenticated without MetaMask (operator provisions PublicMgtKey / allow-list). Operational signing details: $MPA_PATH/references/ED25519_MANAGEMENT_KEY_SIGNING.md.

Host security requirements (mandatory)

Run this skill only on a dedicated, isolated machine used for MPC node

operations.

Do not run this skill on hosts that contain unrelated secrets, wallets,

SSH keys, cloud credentials, or developer tokens.

The only private key material available to the agent should be the **dedicated

management key** used for management API authentication.

Restrict filesystem and network permissions to only what is required for the

local mpc-auth node and expected RPC/API endpoints.

Prefer a dedicated key path (outside your normal user SSH key set) and ensure

this key is not reused for other systems.

Ensure that there is at least one human-controlled node in the threshold+1

required by the MPC algorithm, so the group cannot be taken over solely via prompt injection against an automated management-signing client.

Scope and egress guardrails (mandatory)

This skill is limited to local MPA operations: management API calls on

$MPC_AUTH_URL:$MANAGEMENT_PORT, chain RPC calls configured by the node, and local files under $MPA_PATH plus the dedicated management key path.

Do not send data to external messaging platforms or third-party web APIs

unless the operator explicitly enables that behavior outside this skill.

Do not read unrelated files, shell history, home-directory secrets, cloud

credentials, wallet files, or SSH keys other than the dedicated management key.

Treat AUTH_KEY_PATH material as high-privilege signing input only: never

print or transmit private key contents.

If a task would require leaving this scope, stop and ask for explicit operator

approval first.

ContinuumDAO documentation (end-user setup, before this skill applies):

Running a node — install, configure, operate an mpc-auth node.

https://docs.continuumdao.org/ContinuumDAO/RunningInstructions/NodeRunningInstruction

Creating an MPC signer — Group, KeyGen, shared MPC wallet / address.

https://docs.continuumdao.org/ContinuumDAO/MPCSigner/CreateMPCSigner

Interact using Foundry — forge scripts, cast for on-chain reads.

https://docs.continuumdao.org/ContinuumDAO/OpenClaw/FoundryInstructionSkill (Building multiSignRequest bodies for POST /multiSignRequest is only via the repo helpers listed under When this skill applies—not arbitrary forge projects or hand-written JSON.)

Complete those guides first; then use this skill for **day-to-day agent behavior** (messaging, multiSignRequest, agree/trigger/execute, and API discipline).

New session and environment bootstrap

On session start, follow $MPA_PATH/references/AI_AGENT_NEW_SESSION.md: load $MPA_PATH/.env, confirm MPA_PATH, MPC_AUTH_URL, MANAGEMENT_PORT, AUTH_KEY_PATH, and MPC_CONFIG_PATH; ensure $MPA_PATH/{recipes,references,scripts,tools} symlink to the clone under MPC_CONFIG_PATH when the repo dirs exist; verify GET /health; then set or obtain KEYGEN_ID (existing id or POST /keyGenRequest / agree flow per $MPA_PATH/references/API_IMPLEMENTATION.md). That doc also restates what the mpa-wallet skill is for.

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Overview (read this first)

This section restates the ideas in $MPA_PATH/references/instructions.md in a form suited for users and agents who do not yet see why Group, KeyGen, threshold, and two signature types matter.

What you are operating

A Multi-Party Agent (MPA) wallet is one shared wallet address (EVM today: one Ethereum address) whose private key never exists whole on any server. It is created and used via Multi-Party Computation (MPC) across a Group of nodes (often VPSs). No single node can sign alone: producing a valid **MPC signature requires cooperation of at least threshold+1** nodes. The integer threshold is set when the KeyGen is created. That is how the address stays protected if one machine is compromised.

The MPC address works on any EVM network; it is not locked to one smart contract.

Humans and AI agents are symmetric. Some nodes are operated by people, others by an agent (e.g. Open Claw). All use the same REST ideas: message the group to propose and refine intent; build multiSignRequest bodies only with $MPA_PATH/scripts/generateMultiSignRequestFromCompose.py, $MPA_PATH/scripts/generateSignRequestWithFoundryScript.py, or $MPA_PATH/recipes/ scripts (see $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md and $MPA_PATH/references/AI_AGENT_FORGE_SIGNREQUEST.md). Never invent or hand-edit multiSignRequest JSON from scratch. Submit POST /multiSignRequest with that helper output plus management clientSig / signedMessage (see $MPA_PATH/references/ED25519_MANAGEMENT_KEY_SIGNING.md). Other nodes agree or reject with /signRequestAgree (the originator does not need to agree), optionally add Thoughts, then **EVM execution is only $MPA_PATH/scripts/executeSignResult.py**: that script POSTs /triggerSignRequestById (management-signed, with txParams / messageHash when required), polls GET /getSignResultById until MPC signatures exist, then eth_sendRawTransaction—do not call POST /triggerSignRequestById directly or bypass the script. The agent’s job is to take intent from the KeyGen messaging flow, run only those helpers. Use multiSignJoin.py to merge two helper-sized JSON files into one batch; save stdout and run multiSignJoin.py again (previous output as --a or --b, plus another helper file) to extend ordered sequences on the same chain—repeatedly for multi-step flows. Then POST /multiSignRequest with management signing and later executeSignResult.py as required—never fabricate multiSignRequest JSON except via the approved helpers (compose, Forge, recipes, or multiSignJoin when merging two outputs).

https://www.getfoundry.sh/introduction/getting-started

The two signatures (critical distinction)

1. Management signature — Per-node API authentication. Each client has its own key material; public keys are in config (e.g. mpc-config/configs.yaml). Every POST to the management API must be signed by that client’s management key (Ed25519 for agents, often MetaMask for interactive users). This proves who is calling the API, not what the MPC wallet authorizes on-chain. 2. MPC signature — On-chain authorization by the shared wallet. There is no single MPC private key file. Nodes run a protocol so that, only after enough agreements, a signature valid for the MPC public address is produced.

Groups, KeyGen, signing (short)

Group: Peers configure each other, one node proposes a group, invitees accept

→ Group ID. See Groups / KeyGen / Signing in $MPA_PATH/references/instructions.md.

KeyGen: Started inside a group; all participants must accept; yields pubKey

/ (secp256k1) an Ethereum address and fixes threshold. When all nodes have agreed, the KeyGen is automatically generated after a delay of up to 2 minutes.

Signing: A member proposes a sign request; each node accepts or rejects;

optional Thoughts guide whether to shelve and revise. With threshold+1 accepts, executeSignResult.py POSTs /triggerSignRequestById (MPC signing), then broadcast txs and updateSignResultStatusById.

Persistent context (why messages and Purpose matter)

Each node stores the same logical data over time: KeyGen messages (listMessages, getMessageThread, …) and sign-request / sign-result metadata (Purpose, Thoughts). That shared history is what future decisions should use—regardless of which LLM or agent version is connected.

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When this skill applies

Generating single or batched transaction proposals and POST /multiSignRequest:

only use helper output from $MPA_PATH/scripts/generateMultiSignRequestFromCompose.py, $MPA_PATH/scripts/generateSignRequestWithFoundryScript.py, $MPA_PATH/scripts/multiSignJoin.py (including chained runs whose inputs are prior helper or multiSignJoin output), or a script under $MPA_PATH/recipes/—see $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md. Never hand-write or invent multiSignRequest JSON; add clientSig / signedMessage per $MPA_PATH/references/ED25519_MANAGEMENT_KEY_SIGNING.md, then POST /multiSignRequest. For the Foundry helper, feed forge script run-latest.json per $MPA_PATH/references/AI_AGENT_FORGE_SIGNREQUEST.md. Common intents include **token transfers, cross-chain calls, and other DeFi** protocol interactions. Evaluating the multi-sign lifecycle (POST /signRequestAgree, etc.) when helping operators interpret state. EVM trigger + broadcast: only $MPA_PATH/scripts/executeSignResult.py (it POSTs /triggerSignRequestById—do not call that endpoint directly).

Using KeyGen messaging (POST /sendMessage, GET /getMessageThread) for

group coordination.

Combining with multiSignJoin.py: merge two JSON outputs (recipes,

compose/Foundry helpers, or a previous multiSignJoin stdout saved to a file) into one batch. Chain merges by running multiSignJoin.py again on (merged file + next helper) to build longer same-chain sequences; then POST /multiSignRequest with only that tool output plus management signing (see AI_AGENT_COMPOSE_MULTISIGNREQUEST.md).

Configuring Ed25519 management authentication for automated POST calls to

the node API.

Explaining threshold, Purpose, Thoughts, shelve, and execute

flows.

Do not confuse management signatures (per-node API auth) with **MPC signatures** (threshold signing over a message).

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Core concepts

Group: Set of nodes that mutually trust each other for relay/config;

identified by Group ID. Formed after configured nodes accept a group request.

KeyGen: MPC key generation for a wallet; yields pubKey / (for

secp256k1) an Ethereum address. Requires all invited nodes to accept. Threshold is fixed at KeyGen creation.

Threshold: Minimum cooperating parties minus one in the usual t-of-n

wording: signing needs threshold+1 agreeing nodes.

Management signature: Authenticates this node’s HTTP POSTs to its

management API. Keys come from mpc-config/configs.yaml (e.g. PublicMgtKey / NodeMgtKey).

MPC signature: Produced only when enough nodes accept the same sign

request and the network runs the TSS signing protocol—not a single machine’s private key.

multi-agree: Policy where nodes explicitly agree (signRequestAgree)

before triggerSignRequestById; use POST /multiSignRequest, not /signRequest (relayer/tx-check only).

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Environment (agent)

Default env file: $MPA_PATH/.env. Load this file first (if present) before prompting for missing variables.

KEYGEN_ID — If set, prefer this KeyGen for signing when unambiguous. If

unset or ambiguous, ask the user via the configured channel (e.g. gateway port 18789), or ask if they want a new KeyGen. Default: Unset.

AUTH_KEY_PATH — Directory containing the Ed25519 management private

key (see AUTH_KEY_FILENAME). If unset, scripts resolve ~/.ssh/mpc_auth_ed25519 (equivalent to ~/.ssh + default basename). Default: Unset (→ ~/.ssh/mpc_auth_ed25519).

AUTH_KEY_FILENAME — Basename of the key file inside AUTH_KEY_PATH

(when set). Default: mpc_auth_ed25519.

MPC_MGT_ED25519_SEED_HEX — Optional override: exactly 64 hex characters

(32-byte raw Ed25519 seed), not a PEM/OpenSSH file contents and not a PKCS#8 Base64 line—see $MPA_PATH/references/ED25519_MANAGEMENT_KEY_SIGNING.md § *Raw 32-byte seed vs key file*. If unset, scripts load AUTH_KEY_PATH / AUTH_KEY_FILENAME as a key file.

MPA_PATH — Directory containing references, scripts, recipes, and tools.

Default: ~/.mpa.

MPC_CONFIG_PATH — Absolute path to the mpc-config repo root (clone

with configs.yaml, scripts/, recipes/, references/, tools/, docs/). Used for symlinks into $MPA_PATH and owner docs. Default: /path/to/mpc-config.

MPC_AUTH_URL — Base URL of the management API (host only).

Default: http://127.0.0.1.

MANAGEMENT_PORT — Management API port (see ManagementAPIsPort in

configs.yaml). Default: (often 8080).

Base URL for a co-located node: $MPC_AUTH_URL:$MANAGEMENT_PORT (see configs.yaml for ManagementAPIsPort).

MPA_PATH is a filesystem location, not a credential. primaryEnv is set to MPC_AUTH_URL because the management API endpoint is the primary operational target for this skill.

Schedule $MPA_PATH/scripts/mpc_event_listener.py (see KeyGen inbox poll below)—not keygen_messaging_agent_poll.py alone. --keygen-messages runs the same poll as keygen_messaging_agent_poll.py; KEYGEN_ID, AUTH_KEY_PATH, and MPC_AUTH_URL apply. --sign-ready runs executeSignResult.py per ready id (which POSTs /triggerSignRequestById). KEYGEN_ID is not required for --sign-ready alone (that path still needs AUTH_KEY_PATH / MPC_MGT_ED25519_SEED_HEX for management POSTs inside executeSignResult.py). If KEYGEN_ID is not set for the keygen handler, ask the user what to do, including stopping --keygen-messages polling with cron.

Python dependencies

Use a dedicated virtual environment under $MPA_PATH/.venv (with the default MPA_PATH, that is ~/.mpa/.venv). Install packages **into that venv with pip from the venv (e.g. $MPA_PATH/.venv/bin/pip install …**) or after source $MPA_PATH/.venv/bin/activate — not with bare pip3 on the system interpreter. PyPI names use hyphens where applicable (eth-account installs the eth_account import).

Bootstrap once (if $MPA_PATH/.venv does not exist):

python3 -m venv "$MPA_PATH/.venv"

Then install into the venv:

1. Base (all signing scripts in $MPA_PATH/scripts): $MPA_PATH/.venv/bin/pip install eth-account — pulls rlp, eth_utils, hexbytes, etc., needed by generateSignRequestWithFoundryScript.py, generateMultiSignRequestFromCompose.py, multiSignJoin.py, and executeSignResult.py. 2. Compose + recipes: $MPA_PATH/.venv/bin/pip install PyNaCl — only generateMultiSignRequestFromCompose.py and recipes/*.py need PyNaCl (optional Ed25519 fields on payloads). Skip if you use only the Forge helper, multiSignJoin, or executeSignResult. 3. KeyGen inbox poll + event listener: $MPA_PATH/.venv/bin/pip install cryptography — satisfies keygen_messaging_agent_poll.py and mpc_event_listener.py (same minimum as $MPA_PATH/scripts/requirements-keygen-agent.txt). Alternatively: $MPA_PATH/.venv/bin/pip install -r $MPA_PATH/scripts/requirements-keygen-agent.txt.

Verify packages before running helpers (agents should check the venv, not the system python3):

"$MPA_PATH/.venv/bin/pip" show eth-account PyNaCl cryptography 2>/dev/null | grep -E '^Name:|^Version:'
"$MPA_PATH/.venv/bin/python" -c "import eth_account; import nacl; import cryptography"

(Adjust the import line if optional packages were skipped — e.g. omit nacl / cryptography when not installed.)

Run scripts with $MPA_PATH/.venv/bin/python — for example $MPA_PATH/.venv/bin/python $MPA_PATH/scripts/generateSignRequestWithFoundryScript.py .... Plain python3 ... only works if your shell’s PATH puts that venv first (prefer the explicit venv python path in automation).

KeyGen inbox poll (@agent)

To notice unread channel messages directed at the agent without manual GET /listMessages each time, schedule $MPA_PATH/scripts/mpc_event_listener.py --keygen-messages (recommended: OpenClaw Gateway isolated cron; see $MPC_CONFIG_PATH/docs/AGENT_ED25519_SETUP.md §8.5; OpenClaw cron: https://docs.openclaw.ai/cron). That handler runs the same logic as keygen_messaging_agent_poll.py; use the poll script only for one-off debugging, not as the primary scheduled entry point.

If polling may already be configured, report whether it is active, the last run time (if known), which handlers are enabled, and the period—then ask whether the operator wants to change it. Ask the operator once whether they want scheduled polling (and where: e.g. OpenClaw cron) before you add or change a timer. **If they want a schedule, ask which period from the fixed set: every 1, 5, 10, 30, 60 minutes or every 2, 4, 6, 8, 10, 12, 24 hours**. Use $MPA_PATH/scripts/mpc_cron_schedules.py (--interactive on a TTY, or plain output for the table) to map the choice to OpenClaw --every and crontab. Do not assume background polling: some setups only use ad-hoc GET /listMessages / getMessageThread, and the handler **marks matched messages read**. If they already declined, a cron entry already exists, or they explicitly asked you to wire the poll, skip re-asking.

1. Once: install cryptography into $MPA_PATH/.venv (see **Python dependencies** below). 2. Run: $MPA_PATH/.venv/bin/python $MPA_PATH/scripts/mpc_event_listener.py --keygen-messages (and KEYGEN_ID set; AUTH_KEY_PATH / MPC_AUTH_URL if not defaults). --dry-run applies to the keygen handler only: list matches without multiMarkMessagesRead. 3. Output: one JSON line: handlers.keygen_messages contains matches, match_count, marked_ids (same shape as keygen_messaging_agent_poll.py stdout). If KEYGEN_ID is missing, the keygen_messages handler fails (set KEYGEN_ID). For a JSON error line on stdout instead, run keygen_messaging_agent_poll.py directly (debug only). 4. After handlers.keygen_messages.match_count > 0: the handler only marks messages read; you must read each match’s title and body (and pull thread context with GET /getMessageThread / related APIs if needed), infer intent, then act—invoke tools, management POST routes (e.g. /sendMessage), or build multiSignRequest bodies with the approved helpers and POST /multiSignRequest per $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md (never invent the JSON), or both. Reply in-channel with POST /sendMessage when a text response is appropriate (management-signed; $MPA_PATH/references/API_KEYGEN_MESSAGING.md). Encode the same “parse → act” expectation in any Open Claw cron --message that runs this script. Humans can @agent in title or body to target the agent.

Event listener (mpc_event_listener.py) — optional extra handlers

Use the same mpc_event_listener.py when one cron should also run sign_ready (GET /listSignRequestsReady → executeSignResult.py per id, which POSTs /triggerSignRequestById, polls getSignResultById, then broadcasts—optional --fast / --execute-fast). AI agents run only executeSignResult.py for EVM execution. Ask the operator which handlers to turn on: use --interactive (TTY) or explicit --keygen-messages / --sign-ready (or both). For sign_ready, --execute-fast selects the executeSignResult --fast path (parallel receipt confirmation for batch txs); omit it for sequential execution. --sign-ready-dry-run only lists ready request ids (no executeSignResult). Before you add or change a timer for this script, ask the operator once if they want scheduled polling (and where: e.g. Open Claw cron); if yes, ask which period from the fixed set (**every 1, 5, 10, 30, 60 minutes or every 2, 4, 6, 8, 10, 12, 24 hours**) and map it with mpc_cron_schedules.py to Open Claw --every and crontab. Apply the same ask once / skip re-asking rules as the KeyGen inbox poll above. More handlers can be added to the same script over time.

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Default operational loop (high level)

1. Discuss in KeyGen messaging: human or other nodes POST /sendMessage; everyone reads GET /getMessageThread (and related list/get APIs). Optionally use mpc_event_listener.py --keygen-messages (KeyGen inbox poll above) when the agent should wake on @agent mentions. 2. Plan: use KeyGen message context plus local/on-chain state to pick a concise rationale based on the user's wishes and which path applies: generateMultiSignRequestFromCompose.py, generateSignRequestWithFoundryScript.py, $MPA_PATH/recipes/, and—only when merging two separate helper outputs—multiSignJoin.py (including chained joins for longer same-chain sequences). 3. Build and propose: follow $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md — only those tools; Foundry broadcast JSON for generateSignRequestWithFoundryScript.py per $MPA_PATH/references/AI_AGENT_FORGE_SIGNREQUEST.md. Most proposals: run one compose/Forge/recipe helper and POST /multiSignRequest with that stdout (add clientSig / signedMessage per ED25519_MANAGEMENT_KEY_SIGNING.md)—no multiSignJoin needed. When you need two helper outputs in one batch: merge with multiSignJoin.py (--first-nonce = MPC cast nonce for the first tx in that merge); repeat with saved stdout plus another helper file to grow the batch. Include a concise Purpose (≤256 chars). POST /multiSignRequest with only tool-produced JSON (never ad hoc). 4. Agree: other nodes (everyone except the originator of the sign request) POST /signRequestAgree (accept/reject) until threshold+1 agreements exist. The originator does not need to agree—creating the request already records their intent. Optional Thoughts per node to guide the agent (e.g. to POST /shelveSignRequest and revise). 5. Approval gate (recommended default): require explicit human approval in KeyGen messaging before executeSignResult.py (see step 6). 6. Trigger, MPC sign, and broadcast (AI agent): only $MPA_PATH/scripts/executeSignResult.py. It POSTs /triggerSignRequestById only when getSignResultById does not yet have MPC signatures. **EVM (required): pass --sign-request-file PATH to the saved JSON from the same compose/recipe run (stdout that includes bodyForSign with txNonce** / txGasLimit / fee fields), plus --sign-request-id. The management API does not return those fields on GET /getSignRequestById; the file is what lets the script build txParams and messageHash for trigger (same as web Get Sig). See $MPA_PATH/references/API_IMPLEMENTATION.md § POST /triggerSignRequestById. After trigger, GET /getSignRequestById?tx_params=1 can return the stored snapshot. The script polls GET /getSignResultById until signatures exist, then rebuilds and eth_sendRawTransaction. Single-tx: same reconstruction as continuumdao-node-app Execute — GET /getSignRequestById?tx_params=1 (or merged file), GET /getChainDetails, RPC estimateGas / fee discovery, then r,s,v. Batch: messageRawBatch[i] + batchsignatures[i]. By default sequential receipt waits; --fast for concurrent confirms. Readiness: GET /isSignRequestReadyById (see $MPA_PATH/references/API_IMPLEMENTATION.md). Then POST /updateSignResultStatusById with executed and transactionHash (or batch hashes). 7. Report: POST /sendMessage summarizing what was done and what to expect. 8. Context: for future spends, use messages plus Purpose / Thoughts on sign results (GET /listSignResults, GET /getSignRequestById / getSignResultById).

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Other API capabilities (agent)

Per $MPA_PATH/references/instructions.md, the agent may also: /keyGenRequest, /keyGenRequestAgree, /addKnownAddress, /postChainDetails, /addToken, health/version discovery, and fee/credit checks via GET /getGlobalNonceByKeyGenId (and top-up gas as needed). For on-chain fee state on Linea mainnet, use the subsection below.

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Fee payment (Linea mainnet, chainId 59144)

ContinuumDAO’s fee / registration contract on Linea is deployed at a fixed address. Agents should use Foundry cast against that contract with an RPC URL taken from the node’s chain config (same pattern as other on-chain checks).

Fee contract (Linea mainnet): 0x55aD6Df6d8f8824486C3fd3373f1CF29eCecF0A3

On-chain register() from the MPC wallet (multiSignRequest): use the linea_register.py recipe in $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md (recipes table) (Linea 59144, register(), RPC from getChainDetails). **Fee-token top-up (deposit) from the MPC wallet: linea_fee_deposit.py** in the same table; the MPC must approve the fee contract for the ERC20 fee token before deposit succeeds. For approve + deposit in a single batch multiSignRequest, use forge/script/LineaFeeApproveDeposit.s.sol → generateSignRequestWithFoundryScript.py (see $MPA_PATH/references/AI_AGENT_FORGE_SIGNREQUEST.md § Linea fee). For read-only cast checks below, any RPC URL from the node’s chain config is fine.

Variables: Set KEYGEN_ID to your KeyGen result id (see Environment). Set WALLET_ADDRESS to the MPC wallet Ethereum address for that KeyGen (from GET /getKeyGenResultById / ethereumaddress). Use your management API base URL as $MPC_AUTH_URL:$MANAGEMENT_PORT.

RPC URL from the node (Linea chain_id 59144):

RPC=$(curl -s "$MPC_AUTH_URL:$MANAGEMENT_PORT/getChainDetails?chain_id=59144" | jq -r '.Data.rpcGateway')

Registration and fee state (cast reads only):

# Is the KeyGen registered?
cast call 0x55aD6Df6d8f8824486C3fd3373f1CF29eCecF0A3 \
  "isRegistered(address)(bool)" $WALLET_ADDRESS --rpc-url $RPC
Fee config for this KeyGen
cast call 0x55aD6Df6d8f8824486C3fd3373f1CF29eCecF0A3 \
  "keyGenFeeConfig(address)(address,uint256,uint256,uint256,bytes32)" \
  $WALLET_ADDRESS --rpc-url $RPC
Global nonce (for getRemainingNonces) — from the management API, not cast nonce
GNONCE=$(curl -s "$MPC_AUTH_URL:$MANAGEMENT_PORT/getGlobalNonceByKeyGenId?id=$KEYGEN_ID" | jq -r '.Data.globalnonce')
Remaining signatures before top-up
cast call 0x55aD6Df6d8f8824486C3fd3373f1CF29eCecF0A3 \
  "getRemainingNonces(address,uint256)(uint256)" $WALLET_ADDRESS $GNONCE --rpc-url $RPC

Note: globalnonce here is the KeyGen’s MPC signing counter from the API. It is not the EVM account nonce from cast nonce. Fee payment / top-up can be sent as ordinary EVM transactions from any funded wallet—they do not require the multiSignRequest / threshold flow. Paying from a separate hot wallet or custodian is often more convenient than routing top-ups through the MPC wallet. If you do spend from the MPC address itself, those txs still go through multiSignRequest as usual. For ABI-level details of the fee contract, see $MPA_PATH/references/API_IMPLEMENTATION.md and on-chain docs your deployment publishes.

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Incoming MPC sign requests (policy)

When another member requests a signature, default decision inputs:

Group messages and the request Purpose.

Independent analysis from available node messages, API state, and on-chain data.

Owner instructions left for the agent.

If uncertain, message the owner on the dedicated messaging API

POST /sendMessage awaiting guidance.

Remember: threshold+1 accepts are required to generate the MPC signature.

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Management API authentication (Ed25519)

Every POST to the management API requires a management signature

(Ed25519 or Ethereum NodeMgtKey per node config).

clientSig on multiSignRequest signs messageToSign with the

management key—not the MPC key.

GET /getPublicMgtKeyNonce vs GET /getNodeMgtKeyNonce,

GET /getAllowedEd25519MgtKeys, sign-clipboard (--inline / --inline-file), and tools/ed25519_private_to_pubkey_hex.py: $MPA_PATH/references/ED25519_MANAGEMENT_KEY_SIGNING.md (see §7 *Raw 32-byte seed vs key file* for MPC_MGT_ED25519_SEED_HEX / recipe --ed25519-seed-hex vs --ed25519-key-file).

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Creating multiSignRequest payloads

Skim: Foundry → $MPA_PATH/references/AI_AGENT_FORGE_SIGNREQUEST.md. Compose JSON → $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md. Prefer Recipes below (linea_register, linea_fee_deposit, erc20_transfer, …) before hand-writing compose JSON.

Do not invent or hand-edit multiSignRequest JSON from scratch. Only use $MPA_PATH/scripts/generateMultiSignRequestFromCompose.py, $MPA_PATH/scripts/generateSignRequestWithFoundryScript.py, or a script under $MPA_PATH/recipes/ (see $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md and $MPA_PATH/references/AI_AGENT_FORGE_SIGNREQUEST.md for forge script inputs to the Foundry helper). Typical flow: one helper run → add clientSig / signedMessage → POST /multiSignRequest (no multiSignJoin). When you need two helper outputs in one proposal, merge with multiSignJoin.py; repeat multiSignJoin.py using prior stdout as an input file to build longer sequences (same chain, --first-nonce = first tx nonce in the final batch—typically cast nonce on the MPC address). After any helper or multiSignJoin run prints bodyForSign / messageToSign, add clientSig (and signedMessage if required) per ED25519_MANAGEMENT_KEY_SIGNING.md, then POST /multiSignRequest with that JSON—the agent may call this endpoint; the restriction is never submitting a payload the tools did not produce.

That reference doc has messageToSign / signedMessage / postBody rules, multiSignJoin usage, and the recipes table.

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Scripts

Location: Python scripts for API automation under $MPA_PATH/scripts/. Dependencies: (Python dependencies above — $MPA_PATH/.venv/bin/pip install eth-account, then PyNaCl for compose/recipes). eth_account is required for all of the following.

generateSignRequestWithFoundryScript.py — Forge broadcast JSON →

multiSignRequest JSON. Use when the user needs Foundry script logic for complex flows.

generateMultiSignRequestFromCompose.py — Compose JSON (one or batch calls)

→ multiSignRequest body / messageToSign. Requires PyNaCl.

multiSignJoin.py — Join two helper JSON files → one batch

multiSignRequest output. Chaining: reuse stdout as --a or --b with another helper. --first-nonce = nonce of the first tx in the merge. Valid after clientSig. See $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md.

executeSignResult.py — Only EVM path for AI agents: POSTs

/triggerSignRequestById when needed, polls getSignResultById, then broadcasts like web Execute. Single-tx: getSignRequestById?tx_params=1 + chain/RPC; batch: messageRawBatch + batchsignatures. Sequential by default; --fast for parallel confirm.

keygen_messaging_agent_poll.py — Underlying KeyGen @agent poll (debug

or tests). Prefer mpc_event_listener.py --keygen-messages for scheduled runs.

mpc_event_listener.py — Preferred cron entry: --keygen-messages

(inbox), optional --sign-ready → executeSignResult.py per ready id.

mpc_cron_schedules.py — Maps poll periods (1–60 min, 2–24 h) to Open Claw

--every and crontab.

Recipes

Location: $MPA_PATH/recipes/ — thin CLIs around generateMultiSignRequestFromCompose.py (same venv deps as compose). Check here before hand-writing compose JSON; common operations are covered.

Per-script behavior, the recipes table, and examples: $MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md.

References (bundled snapshots)

Location: API specs and agent notes under $MPA_PATH/references.

$MPC_CONFIG_PATH/docs/CONFIGURING_ED25519_KEYS.md (or $MPA_PATH/docs/...

if docs/ is symlinked) — Node owner: PublicMgtKey, add keys, store agent private keys.

$MPA_PATH/references/instructions.md — Human-oriented full workflow.

$MPA_PATH/references/ED25519_MANAGEMENT_KEY_SIGNING.md — Ed25519 management

signing: allow-list, nonces, tools, KeyGen ClientKeys.

$MPA_PATH/references/AI_AGENT_FORGE_SIGNREQUEST.md — Foundry → helper →

multiSignRequest; clientSig rules.

$MPA_PATH/references/AI_AGENT_COMPOSE_MULTISIGNREQUEST.md — Compose JSON →

multiSignRequest; generateMultiSignRequestFromCompose.py.

$MPA_PATH/references/AI_AGENT_NEW_SESSION.md — .env, symlinks,

GET /health, KEYGEN_ID / KeyGen creation.

$MPA_PATH/references/API_IMPLEMENTATION.md — Canonical REST API (endpoints,

auth, bodies).

$MPA_PATH/references/swagger.yaml — OpenAPI/Swagger for tooling.

$MPA_PATH/references/TOKEN_STORAGE_SCHEMA.md — Local token config (ERC20,

CTMERC20 c3transfer, CTMRWA1, etc.).

$MPA_PATH/references/API_KEYGEN_MESSAGING.md — Inter-node messaging API.

$MPA_PATH/references/KNOWN_ADDRESSES_SCHEMA.md — Local address book (EOA and

contract).

$MPA_PATH/references/README.md — Index of references.

Tools

Location: $MPA_PATH/tools — includes sign-clipboard (management POST signing), ed25519_private_to_pubkey_hex.py, and check_ed25519_mgt_keygen.py (debug allow-list + ClientKeys vs a seed or key file). Usage and --inline / --inline-file: $MPA_PATH/references/ED25519_MANAGEMENT_KEY_SIGNING.md § Tools; sign-clipboard/README.md for flags.

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Style notes for agents

POST /multiSignRequest: use only JSON from

generateMultiSignRequestFromCompose.py, generateSignRequestWithFoundryScript.py, recipes/, or multiSignJoin.py (including chained multiSignJoin runs whose inputs are prior helper or join output files)—never improvise the payload.

Prefer exact JSON bodies and canonical signing strings as described in

API_IMPLEMENTATION.

Lookup REST API endpoints in swagger.yaml first; use API_IMPLEMENTATION

only when you need more detail.

Use Thoughts and Purpose as durable audit and coordination context

across nodes.

Use API_KEYGEN_MESSAGING so group members stay informed.

This skill assumes the **operator has already provisioned an MPA wallet environment** in ContinuumDAO terms—not a single standalone node:

At least two mpc-auth nodes must exist: one run by a human and one run

for the AI agent. Threshold signing requires multiple parties; a minimal useful setup pairs a human-controlled node with an agent-controlled node.

The agent’s node must use Ed25519 management signing so automated

POST calls to the management API are authenticated without MetaMask (operator provisions PublicMgtKey / allow-list). Operational signing details: $MPA_PATH/references/ED25519_MANAGEMENT_KEY_SIGNING.md.