Preview a GBLIN swap (buy ETH→GBLIN or sell GBLIN→ETH) with dynamic slippage and a MEV-saf

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x0ebA5d314F4f5Dcb7A094953Fa9311a45172dd1B",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "amount": "0.01",
          "direction": "buy"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "amount_in_eth": "0.01",
          "direction": "buy",
          "expected_gblin_out": "27.853214",
          "fees": {
            "founder_eth": "0.000005",
            "stability_eth": "0.000005",
            "total_fee_bps": 10
          },
          "next_step": "Call contract.buyGBLIN(safe_min_gblin_out) with msg.value = amount_in_eth.",
          "safe_min_gblin_out": "27.156885",
          "slippage_buffer_bps": 250,
          "slippage_reason": "normal"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "amount": {
                  "description": "Input amount as a decimal string (ETH for buy, GBLIN for sell)",
                  "type": "string"
                },
                "direction": {
                  "description": "Swap direction: buy = ETH→GBLIN, sell = GBLIN→ETH",
                  "enum": [
                    "buy",
                    "sell"
                  ],
                  "type": "string"
                }
              },
              "required": [
                "direction",
                "amount"
              ],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://gblin.digital/api/x402/quote"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://gblin.digital/api/x402/quote");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://gblin.digital/api/x402/quote")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header