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29 lines
819 B
Markdown
29 lines
819 B
Markdown
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# Functions
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A function in Aqua is a block of code expressing a workflow, i.e., a coordination scenario that works across one or more peers.
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A function may take arguments of any type and may return a value.
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A function can call other functions, take functions as arguments of [arrow type](../types.md#arrow-types) and be provided as an arrow argument.
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Essentially, a function is an arrow. The function call is an expression that connects named arguments to an arrow, and gives a name to the result.
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Finally, all a function does is call its arguments or service functions.
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```haskell
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service MySrv:
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foo()
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func do_something(): -- arrow of type: -> ()
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MySrv "srv id"
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MySrv.foo()
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```
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{% hint style="warning" %}
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TODO
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* list all expressions
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* for each, explain the contract and provide a use case
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{% endhint %}
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