constructionPreprocess

{
  "options": {
    "fee": "10000",
    "nonce": "3"
  }
}

curl --location 'https://api.tatum.io/v3/blockchain/node/cosmos-mainnet/construction/preprocess' \
--header 'Content-Type: application/json' \
--header 'x-api-key: {API_KEY}' \
--data '{
    "networkIdentifier": {
        "blockchain": "cosmos",
        "network": "mainnet"
    },
    "operations": [
      {
        "operation_identifier": {
          "index": 1
        },
        "type": "TRANSFER",
      }
    ]
}'

// Import required libraries and modules from Tatum SDK
import { TatumSDK, CosmosRosetta, Network } from "@tatumio/tatum";

// Initialize the Tatum SDK for Cosmos
const tatum = await TatumSDK.init<CosmosRosetta>({
  network: Network.COSMOS_MAINNET,
});

// Define the input parameters with only required fields
const params = {
  networkIdentifier: {
    blockchain: "cosmos", // Specifies the blockchain
    network: "mainnet", // Specifies the network name
  },
  operations: [
    {
      operation_identifier: {
        index: 1, // Specifies the operation index (number)
      },
      type: "TRANSFER", // Specifies the operation type
    },
  ],
};

// Create a request to fetch metadata for transaction construction
const preprocessRequest = await tatum.rpc.constructionPreprocess(params);

// Log the preprocess request
console.log("Construction Preprocess Request:", preprocessRequest);

// Always destroy the Tatum SDK instance when done to stop any background processes
await tatum.destroy();