feat: submit agent-wallet transactions

[MicBun]

resolves: https://github.com/truflation/website/issues/4085

Adds the maa_exec transaction to kwil-js so a developer can run one allow-listed action as an agent wallet (Modular Agent Address): the wallet's restricted agent or unrestricted owner signs the transaction, and the node looks up the rule, enforces the allow-list for the signer's role, and re-enters the engine with @caller rewritten to the wallet. maa_exec is a distinct transaction payload, not an action call.

What this adds

• PayloadType.MAA_EXEC ('maa_exec'), MAAExecPayload, and encodeMAAExec() — serialized byte-for-byte identically to kwil-db's core/types.MAAExec.MarshalBinary (the wire layout is a consensus contract: one divergent byte rewrites which action runs, or under whose identity).
• Public kwil.maaExec(body, signer) method on both NodeKwil and WebKwil, mirroring execSql/transfer. It normalizes the address (0x-hex or raw bytes), defaults an empty namespace to main, validates the 20-byte length, and formats positional inputs through the same encoder execute uses.
• Utils.encodeMAAExec and Types.MAAExecBody exports.

Testing

• New unit tests assert byte-equality against the Go golden vector (kwil-db core/types/payloads_maa_test.go), the single-call argument framing, and empty-namespace handling.
• tsc --noEmit, the full unit suite, and the CJS + ESM build pass; the built dist reproduces the golden vector exactly.

Context

This completes the kwil-js slice of MAA Problem #9. The sibling slices are already merged:

• feat: broadcast arbitrary payloads from the core client kwil-db#1712
• feat: submit agent-wallet transactions sdk-go#193
• feat: submit agent-wallet transactions from Python sdk-py#122

The sdk-js wrapper follows once a kwil-js version shipping this is published.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: e38e5181-d49d-4af3-91f1-e158273937e0

📥 Commits

Reviewing files that changed from the base of the PR and between fe2a9ab and 3a3f594.

📒 Files selected for processing (8)

• src/client/kwil.ts
• src/core/action.ts
• src/core/enums.ts
• src/core/payload.ts
• src/index.ts
• src/transaction/payloadTx.ts
• src/utils/kwilEncoding.ts
• tests/unitTests/utils/kwilEncoding.test.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/maa-exec-submission

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Time Submission Status

Member	#	Time	Running Total	Status	Last Update
MicBun			4h	✅ Submitted	Jun 17, 2026, 6:26 AM

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[MicBun]

@holdex pr submit-time 4h

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