CipherLabs
/
blockscout
mirror of https://github.com/blockscout/blockscout
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

add find_contructor_arguments

Browse Source
pull/2821/head
Ayrat Badykov 5 years ago
parent 71d92e600c
commit e383413e7f
No known key found for this signature in database
GPG Key ID: B44668E265E9396F
2 changed files with 92 additions and 57 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 44
      apps/explorer/lib/explorer/smart_contract/verifier/constructor_arguments.ex
  2. 105
      apps/explorer/test/explorer/smart_contract/verifier/constructor_arguments_test.exs

44
apps/explorer/lib/explorer/smart_contract/verifier/constructor_arguments.ex
Unescape View File

@ -2,7 +2,7 @@ defmodule Explorer.SmartContract.Verifier.ConstructorArguments do
@moduledoc """
Smart contract contrstructor arguments verification logic.
"""
alias ABI.{FunctionSelector, TypeDecoder}
alias Explorer.Chain
def verify(address_hash, contract_code, arguments_data) do
@ -15,7 +15,7 @@ defmodule Explorer.SmartContract.Verifier.ConstructorArguments do
check_func = fn assumed_arguments -> assumed_arguments == arguments_data end
if verify_older_version(creation_code, contract_code, arguments_data) do
if verify_older_version(creation_code, contract_code, check_func) do
true
else
extract_constructor_arguments(creation_code, check_func)
@ -24,11 +24,11 @@ defmodule Explorer.SmartContract.Verifier.ConstructorArguments do
# Earlier versions of Solidity didn't have whisper code.
# constructor argument were directly appended to source code
defp verify_older_version(creation_code, contract_code, arguments_data) do
defp verify_older_version(creation_code, contract_code, check_func) do
creation_code
|> String.split(contract_code)
|> List.last()
|> Kernel.==(arguments_data)
|> check_func.()
end
defp extract_constructor_arguments(code, check_func) do
@ -74,18 +74,30 @@ defmodule Explorer.SmartContract.Verifier.ConstructorArguments do
end
end
# def find_contructor_arguments(address_hash, contract_code, abi) do
# arguments_data = arguments_data |> String.trim_trailing() |> String.trim_leading("0x")
def find_contructor_arguments(address_hash, contract_code, abi) do
creation_code =
address_hash
|> Chain.contract_creation_input_data()
|> String.replace("0x", "")
constructor_abi = Enum.find(abi, fn el -> el["type"] == "constructor" && el["inputs"] != [] end)
# creation_code =
# address_hash
# |> Chain.contract_creation_input_data()
# |> String.replace("0x", "")
input_types = Enum.map(constructor_abi["inputs"], &FunctionSelector.parse_specification_type/1)
# if verify_older_version(creation_code, contract_code, arguments_data) do
# true
# else
# extract_constructor_arguments(creation_code, arguments_data)
# end
# end
check_func = fn assumed_arguments ->
try do
_ =
assumed_arguments
|> Base.decode16!(case: :mixed)
|> TypeDecoder.decode_raw(input_types)
assumed_arguments
rescue
_ -> false
end
end
verify_older_version(creation_code, contract_code, check_func) ||
extract_constructor_arguments(creation_code, check_func)
end
end

105
apps/explorer/test/explorer/smart_contract/verifier/constructor_arguments_test.exs
Unescape View File

@ -6,63 +6,86 @@ defmodule Explorer.SmartContract.Verifier.ConstructorArgumentsTest do
alias Explorer.Chain.Data
alias Explorer.SmartContract.Verifier.ConstructorArguments
test "veriies constructor constructor arguments with whisper data" do
constructor_arguments = Base.encode16(:crypto.strong_rand_bytes(64), case: :lower)
address = insert(:address)
describe "verify/3" do
test "veriies constructor constructor arguments with whisper data" do
constructor_arguments = Base.encode16(:crypto.strong_rand_bytes(64), case: :lower)
address = insert(:address)
input =
"a165627a7a72305820" <>
Base.encode16(:crypto.strong_rand_bytes(32), case: :lower) <> "0029" <> constructor_arguments
input =
"a165627a7a72305820" <>
Base.encode16(:crypto.strong_rand_bytes(32), case: :lower) <> "0029" <> constructor_arguments
input_data = %Data{
bytes: Base.decode16!(input, case: :lower)
}
input_data = %Data{
bytes: Base.decode16!(input, case: :lower)
}
:transaction
|> insert(created_contract_address_hash: address.hash, input: input_data)
|> with_block()
:transaction
|> insert(created_contract_address_hash: address.hash, input: input_data)
|> with_block()
assert ConstructorArguments.verify(address.hash, "", constructor_arguments)
end
assert ConstructorArguments.verify(address.hash, "", constructor_arguments)
end
test "verifies with multiple nested constructor arguments" do
address = insert(:address)
test "verifies with multiple nested constructor arguments" do
address = insert(:address)
constructor_arguments =
"000000000000000000000000314159265dd8dbb310642f98f50c066173c1259b93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae00000000000000000000000000000000000000000000000000000000590b09b0"
constructor_arguments =
"000000000000000000000000314159265dd8dbb310642f98f50c066173c1259b93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae00000000000000000000000000000000000000000000000000000000590b09b0"
input =
"a165627a7a72305820fbfa6f8a2024760ef0e0eb29a332c9a820526e92f8b4fbcce6f00c7643234b1400297b6c4b278d165a6b33958f8ea5dfb00c8c9d4d0acf1985bef5d10786898bc3e7a165627a7a723058203c2db82e7c80cd1e371fe349b03d49b812c324ba4a3fcd063b7bc2662353c5de0029000000000000000000000000314159265dd8dbb310642f98f50c066173c1259b93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae00000000000000000000000000000000000000000000000000000000590b09b0"
input =
"a165627a7a72305820fbfa6f8a2024760ef0e0eb29a332c9a820526e92f8b4fbcce6f00c7643234b1400297b6c4b278d165a6b33958f8ea5dfb00c8c9d4d0acf1985bef5d10786898bc3e7a165627a7a723058203c2db82e7c80cd1e371fe349b03d49b812c324ba4a3fcd063b7bc2662353c5de0029000000000000000000000000314159265dd8dbb310642f98f50c066173c1259b93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae00000000000000000000000000000000000000000000000000000000590b09b0"
input_data = %Data{
bytes: Base.decode16!(input, case: :lower)
}
input_data = %Data{
bytes: Base.decode16!(input, case: :lower)
}
:transaction
|> insert(created_contract_address_hash: address.hash, input: input_data)
|> with_block()
:transaction
|> insert(created_contract_address_hash: address.hash, input: input_data)
|> with_block()
assert ConstructorArguments.verify(address.hash, "", constructor_arguments)
end
assert ConstructorArguments.verify(address.hash, "", constructor_arguments)
end
test "verifies older version of Solidity where constructor_arguments were directly appended to source code" do
address = insert(:address)
constructor_arguments =
"000000000000000000000000314159265dd8dbb310642f98f50c066173c1259b93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae00000000000000000000000000000000000000000000000000000000590b09b0"
test "verifies older version of Solidity where constructor_arguments were directly appended to source code" do
address = insert(:address)
source_code = "0001"
constructor_arguments =
"000000000000000000000000314159265dd8dbb310642f98f50c066173c1259b93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae00000000000000000000000000000000000000000000000000000000590b09b0"
input = source_code <> constructor_arguments
input_data = %Data{
bytes: Base.decode16!(input, case: :lower)
}
:transaction
|> insert(created_contract_address_hash: address.hash, input: input_data)
|> with_block()
assert ConstructorArguments.verify(address.hash, source_code, constructor_arguments)
end
end
source_code = "0001"
describe "find_contructor_arguments/3" do
test "finds contructor arguments" do
address = insert(:address)
expected_contructor_arguments =
"000000000000000000000000314159265dd8dbb310642f98f50c066173c1259b93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae00000000000000000000000000000000000000000000000000000000590b09b0"
input = source_code <> constructor_arguments
input =
"a165627a7a72305820fbfa6f8a2024760ef0e0eb29a332c9a820526e92f8b4fbcce6f00c7643234b1400297b6c4b278d165a6b33958f8ea5dfb00c8c9d4d0acf1985bef5d10786898bc3e7a165627a7a723058203c2db82e7c80cd1e371fe349b03d49b812c324ba4a3fcd063b7bc2662353c5de0029000000000000000000000000314159265dd8dbb310642f98f50c066173c1259b93cdeb708b7545dc668eb9280176169d1c33cfd8ed6f04690a0bcc88a93fc4ae00000000000000000000000000000000000000000000000000000000590b09b0"
input_data = %Data{
bytes: Base.decode16!(input, case: :lower)
}
input_data = %Data{
bytes: Base.decode16!(input, case: :lower)
}
:transaction
|> insert(created_contract_address_hash: address.hash, input: input_data)
|> with_block()
:transaction
|> insert(created_contract_address_hash: address.hash, input: input_data)
|> with_block()
assert ConstructorArguments.verify(address.hash, source_code, constructor_arguments)
assert ConstructorArguments.find_contructor_arguments(address.hash, "", %{})
end
end
end

Write Preview
Loading…
Cancel
Save