prysm-pulse/proto/ssz_proto_library.bzl
2020-06-09 15:40:48 -07:00

62 lines
1.9 KiB
Python

"""
SSZ proto templating rules.
These rules allow for variable substitution for hardcoded tag values like ssz-size and ssz-max.
"""
####### Configuration #######
mainnet = {
"block_roots.size": "8192,32", # SLOTS_PER_HISTORICAL_ROOT, [32]byte
"state_roots.size": "8192,32", # SLOTS_PER_HISTORICAL_ROOT, [32]byte
"eth1_data_votes.size": "1024", # SLOTS_PER_ETH1_VOTING_PERIOD
"randao_mixes.size": "65536,32", # EPOCHS_PER_HISTORICAL_VECTOR, [32]byte
"previous_epoch_attestations.max": "4096", # MAX_ATTESTATIONS * SLOTS_PER_EPOCH
"current_epoch_attestations.max": "4096", # MAX_ATTESTATIONS * SLOTS_PER_EPOCH
"slashings.size": "8192", # EPOCHS_PER_SLASHINGS_VECTOR
}
minimal = {
"block_roots.size": "64,32",
"state_roots.size": "64,32",
"eth1_data_votes.size": "32",
"randao_mixes.size": "64,32",
"previous_epoch_attestations.max": "1024",
"current_epoch_attestations.max": "1024",
"slashings.size": "64",
}
###### Rules definitions #######
def _ssz_proto_files_impl(ctx):
"""
ssz_proto_files implementation performs expand_template based on the value of "config".
"""
outputs = []
if (ctx.attr.config.lower() == "mainnet"):
subs = mainnet
elif (ctx.attr.config.lower() == "minimal"):
subs = minimal
else:
fail("%s is an unknown configuration" % ctx.attr.config)
for src in ctx.attr.srcs:
output = ctx.actions.declare_file(src.files.to_list()[0].basename)
outputs.append(output)
ctx.actions.expand_template(
template = src.files.to_list()[0],
output = output,
substitutions = subs,
)
return [DefaultInfo(files = depset(outputs))]
ssz_proto_files = rule(
implementation = _ssz_proto_files_impl,
attrs = {
"srcs": attr.label_list(mandatory = True, allow_files = [".proto"]),
"config": attr.string(mandatory = True),
},
)