---
agentTools:
  projectIndex: https://innovaz.readme.io/llms.txt
---

# Generate Signature

# OpenAPI definition

```json
{
  "openapi": "3.0.0",
  "info": {
    "title": "Innovaz NFT API",
    "version": "1.0.0"
  },
  "servers": [
    {
      "url": "https://api.testnet.innovaz.io"
    }
  ],
  "tags": [
    {
      "name": "Collections"
    }
  ],
  "paths": {
    "/nft/smc/signature": {
      "post": {
        "tags": [
          "Collections"
        ],
        "summary": "Generate Signature",
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "chain_id": {
                    "type": "integer",
                    "format": "int32"
                  },
                  "user_address": {
                    "type": "string"
                  },
                  "contract_address": {
                    "type": "string"
                  },
                  "nft_address": {
                    "type": "string"
                  },
                  "nft_type": {
                    "type": "integer",
                    "format": "int32",
                    "minimum": 1
                  },
                  "amount": {
                    "type": "integer",
                    "format": "int32",
                    "minimum": 1
                  }
                },
                "required": [
                  "chain_id",
                  "user_address",
                  "contract_address",
                  "nft_address",
                  "nft_type",
                  "amount"
                ],
                "default": {
                  "chain_id": 84531,
                  "user_address": "0x4EF676100062683aAe78D7d9471e4f6822b202d3",
                  "contract_address": "0x90836ab6df35fc19afac9abdff82d1521a48b101",
                  "nft_address": "0xffd748c6b1d20e0c62760a2942bfb491974cc285",
                  "nft_type": 1,
                  "amount": 1
                }
              }
            }
          }
        },
        "parameters": [
          {
            "name": "apikey",
            "in": "header",
            "schema": {
              "type": "string",
              "default": "42b24e5c-2531-4e0d-9908-f1e3f29f38c7"
            },
            "required": true
          },
          {
            "name": "code",
            "in": "query",
            "schema": {
              "type": "string",
              "default": "be5e15eecb49d466155a3dbdd8d757e5"
            },
            "required": true
          }
        ],
        "responses": {
          "200": {
            "description": "Successful response",
            "content": {
              "application/json": {}
            }
          }
        }
      }
    }
  },
  "x-readme": {
    "explorer-enabled": true,
    "proxy-enabled": true,
    "samples-enabled": true
  },
  "_id": {
    "buffer": {
      "0": 100,
      "1": 60,
      "2": 173,
      "3": 142,
      "4": 22,
      "5": 111,
      "6": 27,
      "7": 0,
      "8": 24,
      "9": 244,
      "10": 252,
      "11": 100
    }
  }
}
```