[website/docs]: add page on EVM precompiles #944
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docs/src/spec/precompiles.md
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| ### Parameters | ||
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| - `input_buf`: a sequence of bytes to hash, `MemoryBuffer` |
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The input argument at the callsite is buf; input_buf is the name of the value used internally in the function (argument labelling scheme was borrowed from swift, btw). The signature should probably be written sha2_256(buf: MemoryBuffer) -> u256.
(I'd argue that these single-argument functions should be defined as e.g. sha2_256(_ input_buf: MemoryBuffer) -> u256, so they can be called without a label on the arg.)
docs/src/spec/precompiles.md
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| ### Function signature | ||
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| ```fe,ignore,ignore | ||
| pub fn sha2_256(buf input_buf: MemoryBuffer) -> u256 {} |
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Since I'm nitpicking, the {} should be left off of the signature.
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like this?:
| pub fn sha2_256(buf input_buf: MemoryBuffer) -> u256 {} | |
| pub fn {} sha2_256(buf input_buf: MemoryBuffer) -> u256 |
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I mean "left off of" as in "not included". So, like this:
pub fn sha2_256(buf input_buf: MemoryBuffer) -> u256
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Looks great, thanks for adding this.
We could borrow the descriptions of the functions and parameters from evm.codes (MIT licensed, should be fair game, right?) for a bit more detail, but I'd be happy to see this merged any time as it's obviously much better than what we have now.
docs/src/SUMMARY.md
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| @@ -81,6 +81,7 @@ | |||
| * [Memory](spec/data_layout/memory/index.md) | |||
| * [Sequence types in memory](spec/data_layout/memory/sequence_types_in_memory.md) | |||
| * [Function calls](spec/function_calls.md) | |||
| * [Precompiles](spec/precompiles.md) | |||
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Since precompiles are part of the std library, I believe this should sit outside of spec as spec is supposed to as close as possible a language specification (inspired by https://doc.rust-lang.org/stable/reference/introduction.html) and hence not cover std library stuff. I think that this should either become a sub of "Using Fe" or become a sub of a completely new item but I'm not sure what that would be (maybe "Standard Library"). The more I think about it, I think I like the idea of organizing this under a "Standard Library" section.
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This PR adds a new page documenting the EVM precompiles included in Fe