{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "nkip-0001/receipt.schema.json",
  "title": "NKIP-0001 deposit receipt (v1, draft)",
  "type": "object",
  "additionalProperties": false,
  "required": ["v","issuer","order_id","deposit_asset","deposit_address","deposit_amount","payout_asset","payout_address","payout_amount","rate_type","created_at","expires_at","policy_hash","key_id","sig"],
  "properties": {
    "v": {"const": "nkip01/1"},
    "issuer": {"type": "string", "pattern": "^[a-z0-9.-]+\\.[a-z]{2,}$"},
    "order_id": {"type": "string", "minLength": 1, "maxLength": 128},
    "deposit_asset": {"type": "string", "minLength": 1, "maxLength": 32},
    "deposit_address": {"type": "string", "minLength": 1, "maxLength": 256},
    "deposit_amount": {"type": "string", "pattern": "^[0-9]+$"},
    "payout_asset": {"type": "string", "minLength": 1, "maxLength": 32},
    "payout_address": {"type": "string", "minLength": 1, "maxLength": 256},
    "payout_amount": {"type": "string", "pattern": "^[0-9]+$"},
    "rate_type": {"enum": ["fixed", "float"]},
    "created_at": {"type": "integer", "minimum": 0},
    "expires_at": {"type": "integer", "minimum": 0},
    "refund_address": {"type": "string", "maxLength": 256},
    "policy_hash": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
    "key_id": {"type": "string", "pattern": "^[0-9a-f]{16}$"},
    "sig": {"type": "string", "pattern": "^[A-Za-z0-9_-]{86}$"}
  }
}