Cryptocurrency & Crypto Payments Security

Irreversibility changes everything. In crypto payments, a single bad transaction can settle in seconds with no clawback path. The goal of this workflow is to stop high-blast-radius mistakes before signing, then produce auditable triage when automation cannot prove safety. Rechecked August 21, 2026: stop before signing when ownership, a named floor, or rollback cannot be proved.

What this workflow covers

  • Wallet-op hardening for hot-wallet signing services.
  • Address integrity controls to prevent substitution and poisoning.
  • Key-material cleanup in code, logs, CI artifacts, and runbooks.
  • Settlement policy checks before release and after chain events.

Workflow at a glance

Cryptocurrency & Crypto Payments Security workflow

Bound a wallet, custody, settlement, address-integrity, nonce, or finality remediation before irreversible value movement.

core-remediation

  1. Signal

    Capture the payment risk

    Record the affected asset, network, transaction path, custody boundary, and failure or abuse scenario.

  2. Scope

    Map irreversible effects

    Trace signing authority, address derivation, nonce state, confirmation policy, settlement, and rollback limits.

  3. Decision

    Choose a controlled remedy

    Select validation, policy, signer, idempotency, or confirmation changes that do not move live funds.

  4. Action

    Test in a safe environment

    Use fixtures, testnet, simulation, or replay while keeping production keys and transactions out of scope.

  5. Proof

    Prepare two-key review

    Package test evidence, operational steps, rollback constraints, and required independent approvals.

Decision gate

Can the issue be proven and fixed without signing, broadcasting, or moving production value?

Proceed

Prepare a simulated, independently reviewable change packet.

Hold or stop

Stop for incident, custody, legal, or protocol owners when live-value action is required.

Evidence to retain

  • transaction-path model
  • simulation or testnet results
  • approval requirements

Expected outputs

  • payment remediation plan
  • two-key review packet
  • incident triage note

Eligibility profile

A finding is agent-eligible when all are true:

  1. The fix shape is bounded (policy/config, controlled code path, or deterministic runbook update).
  2. A signed transaction is not emitted directly by the agent.
  3. A dry-run or simulation path exists.
  4. Human approval remains mandatory for production key use.

Recipe catalog

Use the following prompt recipes for this workflow:

Guardrails

  • Signer credentials are scoped to simulation-only in agent runs.
  • Allowlists enforce destination, chain, token, amount, and cadence.
  • Every fail-open branch is converted to fail-closed with triage.
  • Incident evidence is written to immutable audit storage.

Not in scope

  • Autonomous treasury strategy decisions.
  • Trading or market-making actions.
  • On-chain signing from unreviewed prompts.

See also