generator: int & int64 & uint - not supported ?

[iurii-ssv]

I'm trying to use generator and encounter the following error(s):

• for int

  [ERR]: failed to encode storageShare: failed to encode storageShareValidatorMetadata: failed to encode storageShareValidatorMetadata: failed to encode int: could not find struct with name 'int'
  shares.go:22: running "sszgen": exit status 1

• for int64

  [ERR]: failed to encode storageShare: failed to encode storageShareValidatorMetadata: failed to encode storageShareValidatorMetadata: failed to encode int64: could not find struct with name 'int64'
  shares.go:22: running "sszgen": exit status 1

• for uint

  [ERR]: failed to encode storageShare: failed to encode storageShareValidatorMetadata: failed to encode storageShareValidatorMetadata: failed to encode uint: could not find struct with name 'uint'
  shares.go:22: running "sszgen": exit status 1

  It seems uint64 works fine, is there a reason those 3 can't be ssz-encoded ?

[ferranbt]

Can you share a repro of the struct that fails?

[iurii-ssv]

What's also curious is that latest version seems to be 0.1.3 while 0.1.4 seems to have been out for a while now as per https://github.com/ferranbt/fastssz/tags

➜ go install github.com/ferranbt/fastssz/sszgen@latest
...
➜ sszgen version
0.1.3

looking more into it - I believe the issue is only showing up when struct fields start with capital letter (and have int or int64 or uint type):

package storage

//go:generate sszgen -path ./shares.go --objs storageShare

type storageShare struct {
    // intExample working fine
    intExample int
    // int64Example working fine
    int64Example int64
    // uintExample working fine
    uintExample uint

    // IntExample not working fine
    IntExample int
    // Int64Example not working fine
    Int64Example int64
    // UintExample not working fine
    UintExample uint

    Layer2Struct layer2Struct
}

type layer2Struct struct {
    // intExample working fine
    intExample int
    // int64Example working fine
    int64Example int64
    // uintExample working fine
    uintExample uint

    // IntExample not working fine
    IntExample int
    // Int64Example not working fine
    Int64Example int64
    // UintExample not working fine
    UintExample uint
}

[ferranbt]

I was able to reproduce it. There are two issues:

• Uint need to specify the amount of bytes.
• I do not think signed integers are part of the SSZ spec.