Address with optional entrypoint name attached to it. TODO: come up with better name?

Parse an address which can be suffixed with entrypoint name (e.g. "tz1faswCTDciRzE4oJ9jn2Vm2dvjeyA9fUzU%entrypoint").

Parses byte representation of entrypoint address.

For every address

KT1QbdJ7M7uAQZwLpvzerUyk7LYkJWDL7eDh%foo%bar

we get the following byte representation

01afab866e7f1e74f9bba388d66b246276ce50bf4700666f6f25626172
______________________________________//__/____
              address                     %   ep1  % ep2

Annotations for contract parameter declaration.

Following the Michelson specification, this type has the following invariants: 1. No entrypoint name is duplicated. 2. If default entrypoint is explicitly assigned, no "arm" remains uncallable.

Parameter without annotations.

Coordinates of "arm" in Or tree, used solely in error messages.

Errors specific to parameter type declaration (entrypoints).

Construct ParamNotes performing all necessary checks.

Describes how to construct full contract parameter from given entrypoint argument.

This could be just wrapper over Value arg -> Value param, but we cannot use Value type in this module easily.

Reference for calling a specific entrypoint of type arg.

Call parameter which has no entrypoints, always safe.

Construct EntrypointCallT which calls no entrypoint and assumes that there is no explicit "default" one.

Validity of such operation is not ensured.

EntrypointCallT with hidden parameter type.

This requires argument to satisfy ParameterScope constraint. Strictly speaking, entrypoint argument may one day start having different set of constraints comparing to ones applied to parameter, but this seems unlikely.

Construct SomeEntrypointCallT which calls no entrypoint and assumes that there is no explicit "default" one.

Validity of such operation is not ensured.

Call parameter which has no entrypoints, always safe.

Build EntrypointCallT.

Here we accept entrypoint name and type information for the parameter of target contract.

Returns Nothing if entrypoint is not found.

Parameter type of implicit account.

Entrypoint name.

There are two properties we care about:

1. Special treatment of the default entrypoint name. default is prohibited in the CONTRACT instruction and in values of address and contract types. However, it is not prohibited in the SELF instruction. Hence, the value inside EpName can be "default", so that we can distinguish SELF and SELF %default. It is important to distinguish them because their binary representation that is inserted into blockchain is different. For example, typechecking SELF %default consumes more gas than SELF. In this module, we provide several smart constructors with different handling of default, please use the appropriate one for your use case.
2. The set of permitted characters. Intuitively, an entrypoint name should be valid only if it is a valid annotation (because entrypoints are defined using field annotations). However, it is not enforced in Tezos. It is not clear whether this behavior is intended. There is an upstream issue which received bug label, so probably it is considered a bug. Currently we treat it as a bug and deviate from upstream implementation by probiting entrypoint names that are not valid annotations. If Tezos developers fix it soon, we will be happy. If they don't, we should (maybe temporarily) remove this limitation from our code. There is an issue in our repo as well.

This is a bidirectional pattern that can be used for two purposes:

1. Construct an EpName referring to the default entrypoint.
2. Use it in pattern-matching or in equality comparison to check whether EpName refers to the default entrypoint. This is trickier because there are two possible EpName values referring to the default entrypoints. DefEpName will match only the most common one (no entrypoint). However, there is a special case: SELF instruction can have explicit %default reference. For this reason, it is recommended to use isDefEpName instead. Pattern-matching on DefEpName is still permitted for backwards compatibility and for the cases when you are sure that EpName does not come from the SELF instruction.

Make up EpName from annotation in parameter type declaration.

Returns Nothing if no entrypoint is assigned here.

Turn entrypoint name into annotation for contract parameter declaration.

Make up EpName from annotation which is reference to an entrypoint. Note that it's more common for Michelson to prohibit explicit default entrypoint reference.

Specifically, %default annotation is probitited in values of address and contract types. It's also prohibited in the CONTRACT instruction. However, there is an exception: SELF %default is a perfectly valid instruction. Hence, when you construct an EpName from an annotation that's part of SELF, you should use epNameFromSelfAnn instead.

Turn entrypoint name into annotation used as reference to entrypoint.