Merge pull request #2956 from poanetwork/vb-extend-default-list-of-evms

Add support of 0.6.x version of solc compiler

CHANGELOG.md

@@ -8,6 +8,7 @@
 ### Fixes
 - [#2961](https://github.com/poanetwork/blockscout/pull/2961) - Add a guard that addresses is enum in `values` function in `read contract` page
 - [#2960](https://github.com/poanetwork/blockscout/pull/2960) - Add BLOCKSCOUT_HOST to docker setup
+- [#2956](https://github.com/poanetwork/blockscout/pull/2956) - Add support of 0.6.x version of compiler
 - [#2955](https://github.com/poanetwork/blockscout/pull/2955) - Move socket path to env
 - [#2938](https://github.com/poanetwork/blockscout/pull/2938) - utf8 copy tx input tooltip
 - [#2934](https://github.com/poanetwork/blockscout/pull/2934) - RSK release 1.2.0 breaking changes support

apps/block_scout_web/assets/package.json

@@ -8,8 +8,8 @@
   "author": "POA Network",
   "license": "GPL-3.0",
   "engines": {
-    "node": "9.x",
+    "node": "12.x",
-    "npm": "5.x"
+    "npm": "6.x"
   },
   "scripts": {
     "deploy": "webpack --mode production",

apps/explorer/config/config.exs

@@ -12,7 +12,7 @@ config :explorer,
   token_functions_reader_max_retries: 3,
   allowed_evm_versions:
     System.get_env("ALLOWED_EVM_VERSIONS") ||
-      "homestead,tangerineWhistle,spuriousDragon,byzantium,constantinople,petersburg,default",
+      "homestead,tangerineWhistle,spuriousDragon,byzantium,constantinople,petersburg,istanbul,default",
   include_uncles_in_average_block_time:
     if(System.get_env("UNCLES_IN_AVERAGE_BLOCK_TIME") == "true", do: true, else: false),
   healthy_blocks_period: System.get_env("HEALTHY_BLOCKS_PERIOD") || :timer.minutes(5),

apps/explorer/lib/explorer/smart_contract/verifier.ex

@@ -151,6 +151,22 @@ defmodule Explorer.SmartContract.Verifier do
         |> Enum.reverse()
         |> :binary.list_to_bin()
 
+      # Solidity >= 0.6.0 https://github.com/ethereum/solidity/blob/develop/Changelog.md#060-2019-12-17
+      # https://github.com/ethereum/solidity/blob/26b700771e9cc9c956f0503a05de69a1be427963/docs/metadata.rst#encoding-of-the-metadata-hash-in-the-bytecode
+      # IPFS is used instead of Swarm
+      # The current version of the Solidity compiler usually adds the following to the end of the deployed bytecode:
+      # 0xa2
+      # 0x64 'i' 'p' 'f' 's' 0x58 0x22 <34 bytes IPFS hash>
+      # 0x64 's' 'o' 'l' 'c' 0x43 <3 byte version encoding>
+      # 0x00 0x32
+      # Note: there is a bug in the docs. Instead of 0x32, 0x33 should be used.
+      # Fixing PR has been created https://github.com/ethereum/solidity/pull/8174
+      "a264697066735822" <>
+          <<_::binary-size(68)>> <> "64736f6c6343" <> <<_::binary-size(6)>> <> "0033" <> _constructor_arguments ->
+        extracted
+        |> Enum.reverse()
+        |> :binary.list_to_bin()
+
       <<next::binary-size(2)>> <> rest ->
         do_extract_bytecode([next | extracted], rest)
     end

apps/explorer/lib/explorer/smart_contract/verifier/constructor_arguments.ex

@@ -35,36 +35,32 @@ defmodule Explorer.SmartContract.Verifier.ConstructorArguments do
     case code do
       # Solidity ~ 4.23 # https://solidity.readthedocs.io/en/v0.4.23/metadata.html
       "a165627a7a72305820" <> <<_::binary-size(64)>> <> "0029" <> constructor_arguments ->
-        check_func_result = check_func.(constructor_arguments)
+        extract_constructor_arguments_check_func(constructor_arguments, check_func)
-
-        if check_func_result do
-          check_func_result
-        else
-          extract_constructor_arguments(constructor_arguments, check_func)
-        end
 
       # Solidity >= 0.5.10 https://solidity.readthedocs.io/en/v0.5.10/metadata.html
       "a265627a7a72305820" <>
           <<_::binary-size(64)>> <> "64736f6c6343" <> <<_::binary-size(6)>> <> "0032" <> constructor_arguments ->
-        check_func_result = check_func.(constructor_arguments)
+        extract_constructor_arguments_check_func(constructor_arguments, check_func)
-
-        if check_func_result do
-          check_func_result
-        else
-          extract_constructor_arguments(constructor_arguments, check_func)
-        end
 
       # Solidity >= 0.5.11 https://github.com/ethereum/solidity/blob/develop/Changelog.md#0511-2019-08-12
       # Metadata: Update the swarm hash to the current specification, changes bzzr0 to bzzr1 and urls to use bzz-raw://
       "a265627a7a72315820" <>
           <<_::binary-size(64)>> <> "64736f6c6343" <> <<_::binary-size(6)>> <> "0032" <> constructor_arguments ->
-        check_func_result = check_func.(constructor_arguments)
+        extract_constructor_arguments_check_func(constructor_arguments, check_func)
-
+
-        if check_func_result do
+      # Solidity >= 0.6.0 https://github.com/ethereum/solidity/blob/develop/Changelog.md#060-2019-12-17
-          check_func_result
+      # https://github.com/ethereum/solidity/blob/26b700771e9cc9c956f0503a05de69a1be427963/docs/metadata.rst#encoding-of-the-metadata-hash-in-the-bytecode
-        else
+      # IPFS is used instead of Swarm
-          extract_constructor_arguments(constructor_arguments, check_func)
+      # The current version of the Solidity compiler usually adds the following to the end of the deployed bytecode:
-        end
+      # 0xa2
+      # 0x64 'i' 'p' 'f' 's' 0x58 0x22 <34 bytes IPFS hash>
+      # 0x64 's' 'o' 'l' 'c' 0x43 <3 byte version encoding>
+      # 0x00 0x32
+      # Note: there is a bug in the docs. Instead of 0x32, 0x33 should be used.
+      # Fixing PR has been created https://github.com/ethereum/solidity/pull/8174
+      "a264697066735822" <>
+          <<_::binary-size(68)>> <> "64736f6c6343" <> <<_::binary-size(6)>> <> "0033" <> constructor_arguments ->
+        extract_constructor_arguments_check_func(constructor_arguments, check_func)
 
       <<>> ->
         check_func.("")
@@ -74,6 +70,16 @@ defmodule Explorer.SmartContract.Verifier.ConstructorArguments do
     end
   end
 
+  defp extract_constructor_arguments_check_func(constructor_arguments, check_func) do
+    check_func_result = check_func.(constructor_arguments)
+
+    if check_func_result do
+      check_func_result
+    else
+      extract_constructor_arguments(constructor_arguments, check_func)
+    end
+  end
+
   def find_constructor_arguments(address_hash, abi) do
     creation_code =
       address_hash

apps/explorer/package-lock.json

@@ -3,19 +3,6 @@
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   "lockfileVersion": 1,
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-    },
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-      "requires": {
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       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
@@ -38,67 +25,26 @@
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     },
+    "commander": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-3.0.2.tgz",
+      "integrity": "sha512-Gar0ASD4BDyKC4hl4DwHqDrmvjoxWKZigVnAbn5H1owvm4CxCPdb0HQDehwNYMJpla5+M2tPmPARzhtYuwpHow=="
+    },
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-    },
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@@ -116,15 +62,10 @@
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-    },
     "glob": {
-      "version": "7.1.5",
+      "version": "7.1.6",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.5.tgz",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
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+      "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
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@@ -153,11 +94,6 @@
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@@ -190,15 +126,6 @@
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@@ -230,52 +157,16 @@
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@@ -294,42 +185,19 @@
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     "solc": {
-      "version": "0.5.12",
+      "version": "0.6.1",
-      "resolved": "https://registry.npmjs.org/solc/-/solc-0.5.12.tgz",
+      "resolved": "https://registry.npmjs.org/solc/-/solc-0.6.1.tgz",
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+      "integrity": "sha512-iKqNYps2p++x8L9sBg7JeAJb7EmW8VJ/2asAzwlLYcUhj86AzuWLe94UTSQHv1SSCCj/x6lya8twvXkZtlTbIQ==",
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+        "commander": "3.0.2",
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         "memorystream": "^0.3.1",
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@@ -340,56 +208,10 @@
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-      "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.0.tgz",
-      "integrity": "sha512-2eehun/8ALW8TLoIl7MVaRUrg+yCnenu8B4kBlRxj3GJGDKU1Og7sMXPNm1BYyM1DOJmTZ4YeN/Nwxv+8XJsUA==",
-      "requires": {
-        "cliui": "^5.0.0",
-        "find-up": "^3.0.0",
-        "get-caller-file": "^2.0.1",
-        "require-directory": "^2.1.1",
-        "require-main-filename": "^2.0.0",
-        "set-blocking": "^2.0.0",
-        "string-width": "^3.0.0",
-        "which-module": "^2.0.0",
-        "y18n": "^4.0.0",
-        "yargs-parser": "^13.1.1"
-      }
-    },
-    "yargs-parser": {
-      "version": "13.1.1",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.1.tgz",
-      "integrity": "sha512-oVAVsHz6uFrg3XQheFII8ESO2ssAf9luWuAd6Wexsu4F3OtIW0o8IribPXYrD4WC24LWtPrJlGy87y5udK+dxQ==",
-      "requires": {
-        "camelcase": "^5.0.0",
-        "decamelize": "^1.2.0"
-      }
     }
   }
 }

apps/explorer/package.json

@@ -8,12 +8,12 @@
   "author": "POA Network",
   "license": "GPL-3.0",
   "engines": {
-    "node": "9.x",
+    "node": "12.x",
-    "npm": "5.x"
+    "npm": "6.x"
   },
   "scripts": {},
   "dependencies": {
     "keccak": "^2.0.0",
-    "solc": "^0.5.12"
+    "solc": "^0.6.1"
   }
 }

apps/explorer/test/explorer/smart_contract/verifier_test.exs

@@ -212,6 +212,7 @@ defmodule Explorer.SmartContract.VerifierTest do
       params = %{
         "contract_source_code" => different_code,
         "compiler_version" => contract_code_info.version,
+        "evm_version" => "istanbul",
         "name" => contract_code_info.name,
         "optimization" => contract_code_info.optimized
       }