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starknet_getClass

Returns the contract class definition of the specified contract class hash in the specified block.

Parameters​

  • block_id: [Required] The block parameter object containing one of the following:
    • block_hash: (string) Block hash.
    • block_number: (integer) Decimal block number.
    • One of the string tags latest or pending.
  • class_hash: (string) [Required] The class hash of the requested contract class.

Returns​

A contract class object containing:

  • abi: The class ABI, as supplied by the user declaring the class.
  • contract_class_version: The version of the contract class object.
  • entry_points_by_type: Entry points by type.
  • sierra_program: The list of Sierra instructions of which the program consists.

Example​

Replace <YOUR-API-KEY> with an API key from your MetaMask Developer dashboard.

Request​

curl https://starknet-mainnet.infura.io/v3/<YOUR-API-KEY> \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "starknet_getClass",
    "params": {
      "block_id": {
        "block_hash": "0x041b10c45dc3f39372f7b9409261cac9d880c5d75a5bb077d028db20b1bd76c4"
      },
      "class_hash": "0x515dd668a1798214e7ca9ec90c52e267229b8104fb296a90f20b6f70baaef53"
    },
    "id": 0
  }'

Response​

{
  "jsonrpc": "2.0",
  "id": 0,
  "result": {
    "abi": "[{\"type\": \"impl\", \"name\": \"ISTARKSImpl\", \"interface_name\": \"ins::ins::ISTARKS\"}, {\"type\": \"interface\", \"name\": \"ins::ins::ISTARKS\", \"items\": [{\"type\": \"function\", \"name\": \"get_total_supply\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}], \"outputs\": [{\"type\": \"core::integer::u128\"}], \"state_mutability\": \"view\"}, {\"type\": \"function\", \"name\": \"get_max_supply\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}], \"outputs\": [{\"type\": \"core::integer::u128\"}], \"state_mutability\": \"view\"}, {\"type\": \"function\", \"name\": \"balance_of\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}, {\"name\": \"account\", \"type\": \"core::starknet::contract_address::ContractAddress\"}], \"outputs\": [{\"type\": \"core::integer::u128\"}], \"state_mutability\": \"view\"}, {\"type\": \"function\", \"name\": \"allowance\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}, {\"name\": \"owner\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"spender\", \"type\": \"core::starknet::contract_address::ContractAddress\"}], \"outputs\": [{\"type\": \"core::integer::u128\"}], \"state_mutability\": \"view\"}, {\"type\": \"function\", \"name\": \"get_holders\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}], \"outputs\": [{\"type\": \"core::integer::u128\"}], \"state_mutability\": \"view\"}, {\"type\": \"function\", \"name\": \"transfer\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}, {\"name\": \"recipient\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"amount\", \"type\": \"core::integer::u128\"}], \"outputs\": [], \"state_mutability\": \"external\"}, {\"type\": \"function\", \"name\": \"transfer_from\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}, {\"name\": \"sender\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"recipient\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"amount\", \"type\": \"core::integer::u128\"}], \"outputs\": [], \"state_mutability\": \"external\"}, {\"type\": \"function\", \"name\": \"approve\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}, {\"name\": \"spender\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"amount\", \"type\": \"core::integer::u128\"}], \"outputs\": [], \"state_mutability\": \"external\"}, {\"type\": \"function\", \"name\": \"increase_allowance\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}, {\"name\": \"spender\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"added_value\", \"type\": \"core::integer::u128\"}], \"outputs\": [], \"state_mutability\": \"external\"}, {\"type\": \"function\", \"name\": \"decrease_allowance\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}, {\"name\": \"spender\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"subtracted_value\", \"type\": \"core::integer::u128\"}], \"outputs\": [], \"state_mutability\": \"external\"}, {\"type\": \"function\", \"name\": \"Inscribe\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}], \"outputs\": [], \"state_mutability\": \"external\"}, {\"type\": \"function\", \"name\": \"Deploy\", \"inputs\": [{\"name\": \"tick\", \"type\": \"core::felt252\"}, {\"name\": \"maxSupply\", \"type\": \"core::integer::u128\"}, {\"name\": \"maxPerMint\", \"type\": \"core::integer::u128\"}], \"outputs\": [], \"state_mutability\": \"external\"}, {\"type\": \"function\", \"name\": \"get_tick_counter\", \"inputs\": [], \"outputs\": [{\"type\": \"core::integer::u128\"}], \"state_mutability\": \"view\"}, {\"type\": \"function\", \"name\": \"get_ticks\", \"inputs\": [], \"outputs\": [{\"type\": \"core::array::Array::\u003ccore::integer::u128\u003e\"}], \"state_mutability\": \"view\"}]}, {\"type\": \"constructor\", \"name\": \"constructor\", \"inputs\": [{\"name\": \"_admin\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"_ff\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"_eth\", \"type\": \"core::starknet::contract_address::ContractAddress\"}, {\"name\": \"_firstTick\", \"type\": \"core::felt252\"}, {\"name\": \"_firstTickSupply\", \"type\": \"core::integer::u128\"}, {\"name\": \"_firstTickPerMint\", \"type\": \"core::integer::u128\"}]}, {\"type\": \"event\", \"name\": \"ins::ins::STARKS::Transfer\", \"kind\": \"struct\", \"members\": [{\"name\": \"tick\", \"type\": \"core::felt252\", \"kind\": \"data\"}, {\"name\": \"from\", \"type\": \"core::starknet::contract_address::ContractAddress\", \"kind\": \"data\"}, {\"name\": \"to\", \"type\": \"core::starknet::contract_address::ContractAddress\", \"kind\": \"data\"}, {\"name\": \"value\", \"type\": \"core::integer::u128\", \"kind\": \"data\"}]}, {\"type\": \"event\", \"name\": \"ins::ins::STARKS::Approval\", \"kind\": \"struct\", \"members\": [{\"name\": \"tick\", \"type\": \"core::felt252\", \"kind\": \"data\"}, {\"name\": \"owner\", \"type\": \"core::starknet::contract_address::ContractAddress\", \"kind\": \"data\"}, {\"name\": \"spender\", \"type\": \"core::starknet::contract_address::ContractAddress\", \"kind\": \"data\"}, {\"name\": \"value\", \"type\": \"core::integer::u128\", \"kind\": \"data\"}]}, {\"type\": \"event\", \"name\": \"ins::ins::STARKS::Deploy\", \"kind\": \"struct\", \"members\": [{\"name\": \"tick\", \"type\": \"core::felt252\", \"kind\": \"data\"}, {\"name\": \"maxSupply\", \"type\": \"core::integer::u128\", \"kind\": \"data\"}, {\"name\": \"maxPerMint\", \"type\": \"core::integer::u128\", \"kind\": \"data\"}]}, {\"type\": \"event\", \"name\": \"ins::ins::STARKS::Event\", \"kind\": \"enum\", \"variants\": [{\"name\": \"Transfer\", \"type\": \"ins::ins::STARKS::Transfer\", \"kind\": \"nested\"}, {\"name\": \"Approval\", \"type\": \"ins::ins::STARKS::Approval\", \"kind\": \"nested\"}, {\"name\": \"Deploy\", \"type\": \"ins::ins::STARKS::Deploy\", \"kind\": \"nested\"}]}]",
    "contract_class_version": "0.1.0",
    "entry_points_by_type": {
      "CONSTRUCTOR": [
        {
          "function_idx": 14,
          "selector": "0x28ffe4ff0f226a9107253e17a904099aa4f63a02a5621de0576e5aa71bc5194"
        }
      ],
      "EXTERNAL": [
        {
          "function_idx": 11,
          "selector": "0x14dfa38c36b389189b8be0b1d3f9434ffcca49bf1a88f3658579d23d16368f"
        },
        {
          "function_idx": 10,
          "selector": "0x1fd12fd4580400368d8953eca1bf472ee233e7e06245d1ef8c176ff12bd3c4"
        },
        ...
      ],
      "L1_HANDLER": []
    },
    "sierra_program": [
      "0x1",
      "0x3",
      "0x0",
      "0x361",
      "0x800000000000000700000000000000000000000000000000",
      "0x537472756374",
      ...
    ]
  }
}