2019-05-22 17:00:34 +02:00
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(ns status-im.ethereum.eip165
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2018-07-24 11:45:29 +02:00
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"Utility function related to [EIP165](https://eips.ethereum.org/EIPS/eip-165)"
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2019-05-22 17:00:34 +02:00
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(:require [status-im.ethereum.abi-spec :as abi-spec]
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[status-im.ethereum.json-rpc :as json-rpc]))
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2018-07-24 11:45:29 +02:00
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(def supports-interface-hash "0x01ffc9a7")
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(def marker-hash "0xffffffff")
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2019-05-20 02:21:38 +02:00
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(defn supports-interface?
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[contract hash cb]
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(json-rpc/eth-call
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{:contract contract
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:method "supportsInterface(bytes4)"
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:params [hash]
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:on-success cb}))
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2018-07-24 11:45:29 +02:00
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(defn supports?
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"Calls cb with true if `supportsInterface` is supported by this contract.
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See EIP for details."
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[web3 contract cb]
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2019-03-28 11:03:42 +01:00
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(supports-interface?
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contract
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supports-interface-hash
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2019-05-20 02:21:38 +02:00
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#(if (true? (abi-spec/hex-to-boolean %))
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2019-03-28 11:03:42 +01:00
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(supports-interface? contract
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marker-hash
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(fn [response]
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2019-05-20 02:21:38 +02:00
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(cb (false? (abi-spec/hex-to-boolean response)))))
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2019-03-28 11:03:42 +01:00
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(cb false))))
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