Spend Policy

SpendPolicy.sol is an on-chain spend control contract deployed per agent on X Layer.

ZenithPay uses it as the authoritative gate: policy is always checked before swap or settlement.

SpendPolicy.sol: on-chain enforcement

ZenithPay's spend control is enforced by SpendPolicy.sol on X Layer.

Field	Meaning	Enforcement
`perTxLimit`	Max settlement-token amount per transaction	Hard block on-chain
`dailyBudget`	Max cumulative settlement-token spend per day	Hard block on-chain
`allowlist`	Allowed merchant hostnames (service URLs)	Hard block on-chain (when set)
`approvalThreshold`	Settlement-token amount above which payments require human review	Off-chain "pause" queue (not a contract override)

Approved: payment passes hard policy and executes.
Pending: payment exceeds approvalThreshold and is paused for human review (GET /approvals).
Blocked: payment violates hard policy and is rejected immediately (e.g. per_tx_limit_exceeded, daily_budget_exceeded, merchant_not_allowlisted).