\r \r

a2a-Market Stake Freeze\r

\r Build the rule engine shell for stake lock lifecycle in A2A transactions.\r \r Current status: registration-first scaffold with explicit policy points.\r \r

Scope\r

• Lock stake when node accepts an intent or enters negotiation.\r
• Release or slash stake based on final outcome and policy.\r
• Keep stake decisions auditable for dispute resolution.\r \r

Suggested Project Layout\r

• app/domain/rules/stake_rules.py\r
• app/application/services/stake_service.py\r
• app/infrastructure/db/stake_repository.py\r
• app/infrastructure/tasks/stake_timeout_worker.py\r \r

Minimum Contracts (MVP P0)\r

1. freeze_stake(node_id, intent_id, amount) returns lock record.\r
2. release_stake(lock_id, reason) closes lock and restores available stake.\r
3. slash_stake(lock_id, reason, evidence) applies penalty and emits incident log.\r
4. evaluate_timeout_locks(now_ts) handles automatic release/slash decisions.\r \r

Policy Baseline\r

• Lock amount should be deterministic from intent risk tier.\r
• Slashing requires evidence payload and policy version.\r
• Timeout defaults to release unless explicit breach condition is met.\r \r

Events\r

• Emit NEGOTIATION_STARTED when stake lock is confirmed.\r
• Emit risk/stake incident events for policy engine and logging.\r \r

Implementation Backlog\r

• Add dynamic stake multipliers by market volatility.\r
• Add external arbitration hook for manual dispute outcomes.\r \r

Runtime Implementation\r

• Status: implemented in local runtime package.\r
• Primary code paths:\r
• runtime/src/domain/stake-policy.js\r
• Validation: covered by runtime/tests and npm test in runtime/.\r