Ethereum Address Format & Checksum Validator

{
  "type": "object",
  "required": [
    "address"
  ],
  "properties": {
    "address": {
      "type": "string",
      "description": "Ethereum address (e.g. 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045)"
    }
  },
  "additionalProperties": false
}

{
  "type": "object",
  "properties": {
    "input": {
      "type": "string",
      "description": "The address text exactly as submitted, echoed back."
    },
    "valid": {
      "type": "boolean",
      "description": "Overall verdict: true only when the address is correctly formatted AND, if a mixed-case checksum is present, that checksum is valid."
    },
    "normalized": {
      "type": "string",
      "description": "The canonical EIP-55 checksummed form of the address. Observed identical to the input when the input was already correctly checksummed, and re-cased to the correct checksum when the input's casing was wrong -- this is the form to use going forward, not necessarily a copy of what was submitted."
    },
    "format_valid": {
      "type": "boolean",
      "description": "True when the address is a well-formed 0x-prefixed 40-hex-character string, independent of checksum casing."
    },
    "checksum_valid": {
      "type": "boolean",
      "description": "True when the address's mixed-case checksum matches EIP-55. Observed false on a format_valid address with a single altered hex character -- format_valid and checksum_valid are independent checks, not one gating the other."
    },
    "is_zero_address": {
      "type": "boolean",
      "description": "True when the address is the all-zero 0x000...000 null address."
    },
    "checksum_present": {
      "type": "boolean",
      "description": "True when the address uses mixed-case letters, i.e. carries a checksum to check."
    }
  },
  "description": "The address validation result, as returned at routing.responseResultPath ($.output).",
  "additionalProperties": true
}