{
  "casper_contract_schema_version": 1,
  "toolchain": "rustc 1.73.0 (cc66ad468 2023-10-03)",
  "authors": [
    "John Doe <john@doe.com>"
  ],
  "repository": "https://github.com/casper-ecosystem/casper-contract-schema",
  "homepage": "https://john.doe.com",
  "contract_name": "Erc20",
  "contract_version": "0.1.0",
  "types": [
    {
      "struct": {
        "name": "Transfer",
        "description": "Transfer event",
        "members": [
          {
            "name": "from",
            "description": "Sender of tokens.",
            "ty": {
              "Option": "Key"
            }
          },
          {
            "name": "to",
            "description": "Recipient of tokens.",
            "ty": {
              "Option": "Key"
            }
          },
          {
            "name": "value",
            "description": "Transfered amount.",
            "ty": "U256"
          }
        ]
      }
    },
    {
      "struct": {
        "name": "Approval",
        "description": "Approval event",
        "members": [
          {
            "name": "owner",
            "description": null,
            "ty": {
              "Option": "Key"
            }
          },
          {
            "name": "spender",
            "description": null,
            "ty": {
              "Option": "Key"
            }
          },
          {
            "name": "value",
            "description": null,
            "ty": "U256"
          }
        ]
      }
    }
  ],
  "errors": [
    {
      "name": "InsufficientFunds",
      "description": "Insufficient funds",
      "discriminant": 100
    },
    {
      "name": "InsufficientAllowance",
      "description": "Insufficient allowance",
      "discriminant": 101
    }
  ],
  "entry_points": [
    {
      "name": "transfer",
      "description": "Transfer tokens to another account",
      "is_mutable": true,
      "arguments": [
        {
          "name": "recipient",
          "description": null,
          "ty": "Key",
          "optional": false
        },
        {
          "name": "amount",
          "description": null,
          "ty": "U256",
          "optional": false
        }
      ],
      "return_ty": "Unit",
      "is_contract_context": true,
      "access": "public"
    },
    {
      "name": "transfer_from",
      "description": "Transfer tokens from one account to another",
      "is_mutable": true,
      "arguments": [
        {
          "name": "owner",
          "description": null,
          "ty": "Key",
          "optional": false
        },
        {
          "name": "recipient",
          "description": null,
          "ty": "Key",
          "optional": false
        },
        {
          "name": "amount",
          "description": null,
          "ty": "U256",
          "optional": false
        }
      ],
      "return_ty": "Unit",
      "is_contract_context": true,
      "access": "public"
    },
    {
      "name": "approve",
      "description": "Approve spender to use tokens on behalf of the owner",
      "is_mutable": true,
      "arguments": [
        {
          "name": "spender",
          "description": null,
          "ty": "Key",
          "optional": false
        },
        {
          "name": "amount",
          "description": null,
          "ty": "U256",
          "optional": false
        }
      ],
      "return_ty": "Unit",
      "is_contract_context": true,
      "access": "public"
    },
    {
      "name": "allowance",
      "description": "Check the amount of tokens that an owner allowed to a spender",
      "is_mutable": false,
      "arguments": [
        {
          "name": "owner",
          "description": null,
          "ty": "Key",
          "optional": false
        },
        {
          "name": "spender",
          "description": null,
          "ty": "Key",
          "optional": false
        }
      ],
      "return_ty": "U256",
      "is_contract_context": true,
      "access": "public"
    },
    {
      "name": "balance_of",
      "description": "Check the amount of tokens owned by an account",
      "is_mutable": false,
      "arguments": [
        {
          "name": "owner",
          "description": null,
          "ty": "Key",
          "optional": false
        }
      ],
      "return_ty": "U256",
      "is_contract_context": true,
      "access": "public"
    },
    {
      "name": "total_supply",
      "description": "Check the total supply of tokens",
      "is_mutable": false,
      "arguments": [],
      "return_ty": "U256",
      "is_contract_context": true,
      "access": "public"
    }
  ],
  "events": [
    {
      "name": "event_Transfer",
      "ty": "Transfer"
    },
    {
      "name": "event_Approval",
      "ty": "Approval"
    }
  ],
  "call": {
    "wasm_file_name": "erc20.wasm",
    "description": "Fungible token",
    "arguments": [
      {
        "name": "name",
        "description": "Name of the token",
        "ty": "String",
        "optional": false
      },
      {
        "name": "symbol",
        "description": "Symbol of the token",
        "ty": "String",
        "optional": false
      },
      {
        "name": "decimals",
        "description": "Number of decimals",
        "ty": "U8",
        "optional": false
      },
      {
        "name": "initial_supply",
        "description": "Initial supply of tokens",
        "ty": "U256",
        "optional": false
      }
    ]
  }
}