Remove Solidity 0.6 & 0.7 code

.changeset/witty-jeans-wave.md

@@ -0,0 +1,5 @@
+---
+"chainlink": minor
+---
+
+Remove 0.6 and 0.7 Solidity source code

.github/workflows/solidity.yml

@@ -26,15 +26,14 @@ jobs:
               - 'contracts/**/*'
               - '.github/workflows/solidity.yml'
               - '.github/workflows/solidity-foundry.yml'
-            old_sol:
-              - 'contracts/src/v0.6/**/*'
-              - 'contracts/src/v0.7/**/*'
+            read_only_sol:
+              - 'contracts/src/v0.8/interfaces/**/*'
 
       - name: Fail if read-only files have changed
-        if: ${{ steps.changes.outputs.old_sol == 'true' }}
+        if: ${{ steps.changes.outputs.read_only_sol == 'true' }}
         run: |
           echo "One or more read-only Solidity file(s) has changed."
-          for file in ${{ steps.changes.outputs.old_sol_files }}; do
+          for file in ${{ steps.changes.outputs.read_only_sol_files }}; do
             echo "$file was changed"
           done
           exit 1

contracts/.changeset/nine-comics-bathe.md

@@ -0,0 +1,5 @@
+---
+"@chainlink/contracts": minor
+---
+
+Removed 0.6 and 0.7 Solidity source code

contracts/.prettierignore

@@ -21,8 +21,6 @@ node_modules
 solc
 LinkToken.json
 typechain
-src/v0.6
-src/v0.7
 **/vendor
 
 # Ignore TS definition and map files

contracts/.solcover.js

@@ -1,15 +1,20 @@
 module.exports = {
   skipFiles: [
-    'v0.6/',
-    'v0.7/',
     'v0.8/mocks',
     'v0.8/interfaces',
     'v0.8/vendor',
+    'v0.8/tests',
     'v0.8/dev/interfaces',
     'v0.8/dev/vendor',
     'v0.8/dev/Keeper2_0/interfaces',
     'v0.8/dev/transmission',
     'v0.8/tests',
+    'v0.8/automation/testhelpers',
+    'v0.8/shared',
+    'v0.8/vrf/testhelpers',
+    'v0.8/vrf/mocks',
+    'v0.8/llo-feeds/test',
+    'v0.8/functions/tests',
   ],
   istanbulReporter: ['text', 'text-summary', 'json'],
   mocha: {

contracts/README.md

@@ -14,12 +14,8 @@ $ npm install @chainlink/contracts --save
 ```sh
 @chainlink/contracts
 ├── src # Solidity contracts
-│   ├── v0.6
-│   ├── v0.7
 │   └── v0.8
 └── abi # ABI json output
-    ├── v0.6
-    ├── v0.7
     └── v0.8
 ```
 

contracts/foundry.toml

@@ -23,7 +23,7 @@ test = 'src/v0.8/functions/tests/v1_X'
 gas_price = 3_000_000_000 # 3 gwei
 
 [profile.vrf]
-optimizer_runs = 1000
+optimizer_runs = 1_000
 src = 'src/v0.8/vrf'
 test = 'test/v0.8/foundry/vrf' # skips tests for no VRF foundry tests
 
@@ -36,18 +36,18 @@ optimizer_runs = 1_000_000
 src = 'src/v0.8/vrf'
 
 [profile.automation]
-optimizer_runs = 10000
+optimizer_runs = 10_000
 src = 'src/v0.8/automation'
 test = 'src/v0.8/automation/test'
 
 [profile.l2ep]
-optimizer_runs = 1000000
+optimizer_runs = 1_000_000
 src = 'src/v0.8/l2ep'
 test = 'src/v0.8/l2ep/test'
 solc_version = '0.8.19'
 
 [profile.llo-feeds]
-optimizer_runs = 1000000
+optimizer_runs = 1_000_000
 src = 'src/v0.8/llo-feeds'
 test = 'src/v0.8/llo-feeds/test'
 solc_version = '0.8.19'
@@ -59,8 +59,14 @@ src = 'src/v0.8/keystone'
 test = 'src/v0.8/keystone/test'
 optimizer_runs = 10_000
 
+[profile.operatorforwarder]
+optimizer_runs = 1_000_000
+solc_version = '0.8.19'
+src = 'src/v0.8/operatorforwarder'
+test = 'src/v0.8/operatorforwarder/test'
+
 [profile.shared]
-optimizer_runs = 1000000
+optimizer_runs = 1_000_000
 src = 'src/v0.8/shared'
 test = 'src/v0.8/shared/test'
 solc_version = '0.8.19'

contracts/hardhat.config.ts

@@ -60,14 +60,6 @@ let config = {
   },
   solidity: {
     compilers: [
-      {
-        version: '0.6.6',
-        settings: COMPILER_SETTINGS,
-      },
-      {
-        version: '0.7.6',
-        settings: COMPILER_SETTINGS,
-      },
       {
         version: '0.8.6',
         settings: COMPILER_SETTINGS,

contracts/scripts/native_solc_compile_all

@@ -12,7 +12,7 @@ python3 -m pip install --require-hashes -r $SCRIPTPATH/requirements.txt
 # 6 and 7 are legacy contracts, for each other product we have a native_solc_compile_all_$product script
 # These scripts can be run individually, or all together with this script.
 # To add new CL products, simply write a native_solc_compile_all_$product script and add it to the list below.
-for product in 6 7 automation events_mock feeds functions keystone llo-feeds logpoller operatorforwarder shared transmission vrf
+for product in automation events_mock feeds functions keystone llo-feeds logpoller operatorforwarder shared transmission vrf
 do
   $SCRIPTPATH/native_solc_compile_all_$product
 done

contracts/scripts/prepublish_generate_abi_folder

@@ -9,7 +9,7 @@ SCRIPTPATH="$( cd "$(dirname "$0")" >/dev/null 2>&1 ; cd .. && pwd -P )"
 TARGET="abi"
 
 # For each version directory in src, copy the json files to the correct location
-versions=( v0.6 v0.7 v0.8 )
+versions=( v0.8 )
 for version in "${versions[@]}"
 do
   rm -rf $SCRIPTPATH/$TARGET/$version