Demo.json

{
  "abi": [
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": false,
          "internalType": "string",
          "name": "message",
          "type": "string"
        }
      ],
      "name": "Echo",
      "type": "event"
    },
    {
      "inputs": [
        {
          "internalType": "string",
          "name": "message",
          "type": "string"
        }
      ],
      "name": "echo",
      "outputs": [],
      "stateMutability": "nonpayable",
      "type": "function"
    }
  ],
  "bytecode": "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"
}