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Verifier nodes are lightweight, independently deployed actors responsible for ensuring fidelity of automation. They provide the trust layer that makes Kwala’s decentralized execution verifiable and tamper-proof. While execution nodes process workflows and perform actions, verifier nodes act as independent auditors. They ensure that every workflow execution adheres strictly to the user’s signed intent and the defined workflow logic.

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Role of verifier nodes

Verifier nodes perform four primary functions in the Kwala network:

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Verification process

1

Execution proof retrieval

Verifier nodes retrieve execution proofs submitted by executor nodes from Kwala’s decentralized ledger. These proofs contain all inputs, outputs, and state transitions from the workflow execution.
2

Intent reconstruction

The verifier retrieves the original user-signed workflow intent from the chain and reconstructs the expected execution path.
3

Independent re-computation

Using the same inputs and trigger data, the verifier independently re-computes the workflow logic to determine the expected outcome.
4

Result comparison

The verifier compares its computed result against the executor’s submitted proof. Any discrepancy triggers the dispute process.
5

Dispute or attestation

If results match, the verifier attests to the execution validity. If results differ, the verifier files a dispute to the arbitration contract.

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Security guarantees

Verifier nodes provide several security guarantees to the Kwala network:
  • Non-repudiation: Users cannot deny their signed intents
  • Execution fidelity: Executors cannot deviate from defined workflows
  • Transparency: All verifications are recorded on-chain
  • Accountability: Malicious actors face economic penalties

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Next steps

System overview

Review the complete system architecture

Workflow execution

Understand the execution lifecycle