Support encode/decode functions on hosted abi #2348
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| params_ptr: AscPtr<Array<AscPtr<AscEnum<EthereumValueKind>>>>, | ||
| ) -> Result<AscPtr<Uint8Array>, DeterministicHostError> { | ||
| let data = host_exports::abi_encode(self.asc_get(params_ptr)?); | ||
| // return `null` if it fails |
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This is reasonable, but needs to be documented on the graph-ts api.
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You mean with a | null in the type annotation?
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Ah yes that's even better than just documenting it.
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I've added on graph-ts 🙂
I will add later on docs!
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runtime/wasm/src/host_exports.rs
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| let param_types = | ||
| Reader::read(&types).or_else(|e| Err(anyhow::anyhow!("Failed to read types: {}", e)))?; | ||
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| decode(&[param_types], &data).context("Failed to decode") |
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If we pass a single type to decode, we're guaranteed to have a single Token as output, so we can assert that here and return Token instead of Vec<Token>.
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Only the tests are missing, I can run them locally now, so that should be no problem 🙂 |
| Reader::read(&types).or_else(|e| Err(anyhow::anyhow!("Failed to read types: {}", e)))?; | ||
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| decode(&[param_types], &data) | ||
| .map(|mut tokens| tokens.pop().unwrap()) |
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Please add a comment explaining why it's ok to .pop().unwrap() and discard the vec.
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| assert(address.toAddress() == decoded[0].toAddress(), "address ethereum encoded does not equal the decoded value"); | ||
| assert(bigInt1.toBigInt() == decoded[1].toTuple()[0].toArray()[0].toBigInt(), "uint256[0] ethereum encoded does not equal the decoded value"); | ||
| assert(bigInt2.toBigInt() == decoded[1].toTuple()[0].toArray()[1].toBigInt(), "uint256[1] ethereum encoded does not equal the decoded value"); | ||
| assert(bool.toBoolean() == decoded[1].toTuple()[1].toBoolean(), "boolean ethereum encoded does not equal the decoded value"); |
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It would be good to use some intermediary variables to make the test more readable. It's great to have a test for tuples, could we also test for a simple type, and also for nested tuples? e.g. (address,(address, bool)).
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@otaviopace Could you also write something in the 'unreleased' section of NEWS.md about this? |
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| let encoded = ethereum.encode(params)!; | ||
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| let decoded = ethereum.decode("(address,(address,bool))", encoded).toTuple(); |
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The simple case I meant was not a tuple at all, but just .decode("address", ..
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Solves #767.
Note for the reviewer: the part that I am not quite sure if its good is the error handling on
abi_decode.Also, I need some help with the tests, they should be only on
graph-ts?