diff --git a/.github/eosjs-ci/Dockerfile b/.github/eosjs-ci/Dockerfile
index f26af56d7..277738a80 100644
--- a/.github/eosjs-ci/Dockerfile
+++ b/.github/eosjs-ci/Dockerfile
@@ -14,11 +14,11 @@ RUN git clone https://github.com/EOSIO/eos \
  && cd eos \
  && git checkout develop
 
-RUN git clone https://github.com/EOSIO/eosio.contracts \
- && cd eosio.contracts \
+RUN git clone https://github.com/EOSIO/eosio.cdt \
+ && cd eosio.cdt \
  && git checkout develop \
- && mkdir build && cd build && mkdir eosio.token && cd .. \
- && eosio-cpp -abigen ./contracts/eosio.token/src/eosio.token.cpp -o ./build/eosio.token/eosio.token.wasm -R ./contracts/eosio.token/ricardian/ -I ./contracts/eosio.token/include/
+ && mkdir build && cd build && mkdir read_only_query_tests && cd .. \
+ && eosio-cpp -abigen ./tests/unit/test_contracts/read_only_query_tests.cpp -o ./build/read_only_query_tests/read_only_query_tests.wasm
 
 RUN git clone https://github.com/EOSIO/key-value-example-app.git \
  && cd key-value-example-app \
@@ -36,11 +36,15 @@ RUN cd cfhello \
 
 
 FROM eosio/eosio:${EOSBRANCH}
-ENTRYPOINT ["nodeos", "--data-dir", "/root/.local/share", "-e", "-p", "eosio", "--replay-blockchain", "--plugin", "eosio::producer_plugin", "--plugin", "eosio::chain_api_plugin", "--plugin", "eosio::trace_api_plugin", "--trace-no-abis", "--plugin", "eosio::db_size_api_plugin", "--plugin", "eosio::http_plugin", "--http-server-address=0.0.0.0:8888", "--access-control-allow-origin=*", "--contracts-console", "--http-validate-host=false", "--enable-account-queries=true", "--verbose-http-errors", "--max-transaction-time=100"]
+ENTRYPOINT ["nodeos", "--data-dir", "/root/.local/share", "-e", "-p", "eosio", "--replay-blockchain", "--plugin", "eosio::producer_plugin", "--plugin", "eosio::producer_api_plugin", "--plugin", "eosio::chain_api_plugin", "--plugin", "eosio::trace_api_plugin", "--trace-no-abis", "--plugin", "eosio::db_size_api_plugin", "--plugin", "eosio::http_plugin", "--http-server-address=0.0.0.0:8888", "--access-control-allow-origin=*", "--contracts-console", "--http-validate-host=false", "--enable-account-queries=true", "--verbose-http-errors", "--max-transaction-time=100"]
 WORKDIR /root
 RUN mkdir -p "/opt/eosio/bin/contracts"
 COPY --from=contracts /root/eos/contracts/contracts/eosio.bios/bin/* /opt/eosio/bin/contracts/eosio.bios/
 COPY --from=contracts /root/eos/contracts/contracts/eosio.boot/bin/* /opt/eosio/bin/contracts/eosio.boot/
+COPY --from=contracts /root/eos/unittests/contracts/eosio.system/* /opt/eosio/bin/contracts/eosio.system/
+COPY --from=contracts /root/eos/unittests/contracts/eosio.msig/* /opt/eosio/bin/contracts/eosio.msig/
+COPY --from=contracts /root/eos/unittests/contracts/eosio.token/* /opt/eosio/bin/contracts/eosio.token/
+COPY --from=contracts /root/eosio.cdt/build/read_only_query_tests/* /opt/eosio/bin/contracts/read_only_query_tests/
 COPY --from=contracts /root/eosio.contracts/build/ /opt/eosio/bin/contracts
 COPY --from=contracts /root/key-value-example-app/contracts/kv_todo/build/* /opt/eosio/bin/contracts/kv_todo/
 COPY --from=contracts /root/return-values-example-app/contracts/action_return_value/build/* /opt/eosio/bin/contracts/action_return_value/
diff --git a/.github/eosjs-ci/scripts/deploy_contracts.sh b/.github/eosjs-ci/scripts/deploy_contracts.sh
index f4a694e96..4803722e1 100644
--- a/.github/eosjs-ci/scripts/deploy_contracts.sh
+++ b/.github/eosjs-ci/scripts/deploy_contracts.sh
@@ -162,11 +162,8 @@ cleos create account eosio eosio.vpay $SYSTEM_ACCOUNT_PUBLIC_KEY
 cleos create account eosio eosio.rex $SYSTEM_ACCOUNT_PUBLIC_KEY
 cleos create account eosio eosio.token $SYSTEM_ACCOUNT_PUBLIC_KEY
 cleos create account eosio returnvalue $SYSTEM_ACCOUNT_PUBLIC_KEY
+cleos create account eosio readonly $EXAMPLE_ACCOUNT_PUBLIC_KEY
 cleos create account eosio todo $SYSTEM_ACCOUNT_PUBLIC_KEY
-cleos create account eosio bob $EXAMPLE_ACCOUNT_PUBLIC_KEY
-cleos create account eosio alice $EXAMPLE_ACCOUNT_PUBLIC_KEY
-cleos create account eosio bobr1 $R1_EXAMPLE_ACCOUNT_PUBLIC_KEY
-cleos create account eosio alicer1 $R1_EXAMPLE_ACCOUNT_PUBLIC_KEY
 cleos create account eosio cfhello $CFHELLO_PUBLIC_KEY
 cleos create account cfhello cfactor $CFACTOR_PUBLIC_KEY
 
@@ -193,6 +190,7 @@ activate_feature "4a90c00d55454dc5b059055ca213579c6ea856967712a56017487886a4d4cc
 activate_feature "1a99a59d87e06e09ec5b028a9cbb7749b4a5ad8819004365d02dc4379a8b7241"
 activate_feature "bf61537fd21c61a60e542a5d66c3f6a78da0589336868307f94a82bccea84e88"
 activate_feature "5443fcf88330c586bc0e5f3dee10e7f63c76c00249c87fe4fbf7f38c082006b4"
+activate_feature "808c49387292c34ccb3970e00b08a690b6b3370c1cbcec46d46c19d5dfafab03"
 
 sleep 1s
 setabi eosio $CONTRACTS_DIR/eosio.bios/eosio.bios.abi
@@ -214,21 +212,45 @@ sleep 1s
 setabi returnvalue $CONTRACTS_DIR/action_return_value/action_return_value.abi
 setcode returnvalue $CONTRACTS_DIR/action_return_value/action_return_value.wasm
 
+sleep 1s
+setabi readonly $CONTRACTS_DIR/read_only_query_tests/read_only_query_tests.abi
+setcode readonly $CONTRACTS_DIR/read_only_query_tests/read_only_query_tests.wasm
+
+sleep 1s
+setabi eosio.msig $CONTRACTS_DIR/eosio.msig/eosio.msig.abi
+setcode eosio.msig $CONTRACTS_DIR/eosio.msig/eosio.msig.wasm
+
+sleep 1s
+setabi eosio $CONTRACTS_DIR/eosio.system/eosio.system.abi
+setcode eosio $CONTRACTS_DIR/eosio.system/eosio.system.wasm
+
 sleep 1s
 setabi eosio.token $CONTRACTS_DIR/eosio.token/eosio.token.abi
 setcode eosio.token $CONTRACTS_DIR/eosio.token/eosio.token.wasm
 
 sleep 1s
-cleos push action eosio.token create '["bob", "10000000000.0000 SYS"]' -p eosio.token
-cleos push action eosio.token issue '["bob", "5000000000.0000 SYS", "Half of available supply"]' -p bob
-cleos push action eosio.token transfer '["bob", "alice", "1000000.0000 SYS", "memo"]' -p bob
-cleos push action eosio.token transfer '["bob", "bobr1", "1000000.0000 SYS", "memo"]' -p bob
-cleos push action eosio.token transfer '["bob", "alicer1", "1000000.0000 SYS", "memo"]' -p bob
+cleos push action eosio.token create '["eosio", "10000000000.0000 SYS"]' -p eosio.token
+cleos push action eosio.token issue '["eosio", "5000000000.0000 SYS", "Half of available supply"]' -p eosio
+
+cleos push action eosio init '["0", "4,SYS"]' -p eosio@active
+
+cleos system newaccount eosio --transfer bob $EXAMPLE_ACCOUNT_PUBLIC_KEY --stake-net "10000.0000 SYS" --stake-cpu "10000.0000 SYS" --buy-ram-kbytes 8192
+cleos system newaccount eosio --transfer alice $EXAMPLE_ACCOUNT_PUBLIC_KEY --stake-net "10000.0000 SYS" --stake-cpu "10000.0000 SYS" --buy-ram-kbytes 8192
+cleos system newaccount eosio --transfer bobr1 $R1_EXAMPLE_ACCOUNT_PUBLIC_KEY --stake-net "10000.0000 SYS" --stake-cpu "10000.0000 SYS" --buy-ram-kbytes 8192
+cleos system newaccount eosio --transfer alicer1 $R1_EXAMPLE_ACCOUNT_PUBLIC_KEY --stake-net "10000.0000 SYS" --stake-cpu "10000.0000 SYS" --buy-ram-kbytes 8192
+
+sleep 1s
+cleos push action eosio.token transfer '["eosio", "bob", "1000.0000 SYS", "memo"]' -p eosio
+cleos push action eosio.token transfer '["eosio", "alice", "1000.0000 SYS", "memo"]' -p eosio
+cleos push action eosio.token transfer '["eosio", "bobr1", "1000.0000 SYS", "memo"]' -p eosio
+cleos push action eosio.token transfer '["eosio", "alicer1", "1000.0000 SYS", "memo"]' -p eosio
 
 cleos push action todo upsert '["bf581bee-9f2c-447b-94ad-78e4984b6f51", "todo", "Write Hello World Contract", false]' -p todo@active
 cleos push action todo upsert '["b7b0d09d-a82b-44d9-b067-3bae2d02917e", "todo", "Start Blockchain", false]' -p todo@active
 cleos push action todo upsert '["ac8acfe7-cd4e-4d22-8400-218b697a4517", "todo", "Deploy Hello World Contract", false]' -p todo@active
 
+cleos push action readonly setup '[]' -p readonly@active
+
 echo "All done initializing the blockchain"
 
 if [[ -z $NODEOS_RUNNING ]]; then
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5a29b6ea6..ef56c22c0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12.14.1]
+        node-version: [15.14.0]
     steps:
       - name: Check for GIT_API_KEY
         id: check_token
diff --git a/.github/workflows/integration-test-develop.yml b/.github/workflows/integration-test-develop.yml
index d64efa38e..47f466860 100644
--- a/.github/workflows/integration-test-develop.yml
+++ b/.github/workflows/integration-test-develop.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12.14.1]
+        node-version: [15.14.0]
     steps:
       - name: Checkout
         uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
diff --git a/.github/workflows/integration-test-release.yml b/.github/workflows/integration-test-release.yml
index 3726decde..3de1556bc 100644
--- a/.github/workflows/integration-test-release.yml
+++ b/.github/workflows/integration-test-release.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12.14.1]
+        node-version: [15.14.0]
     steps:
       - name: Checkout
         uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
diff --git a/.github/workflows/publish-edge.yml b/.github/workflows/publish-edge.yml
index 0a4e7db7f..7add10e78 100644
--- a/.github/workflows/publish-edge.yml
+++ b/.github/workflows/publish-edge.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12.14.1]
+        node-version: [15.14.0]
     steps:
       - name: Checkout
         uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
diff --git a/.github/workflows/publish-release.yml b/.github/workflows/publish-release.yml
index 069a700b1..9e8e1f9df 100644
--- a/.github/workflows/publish-release.yml
+++ b/.github/workflows/publish-release.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       matrix:
-        node-version: [12.14.1]
+        node-version: [15.14.0]
     steps:
       - name: Checkout
         uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-16.04
     strategy:
       matrix:
-        node-version: [12.14.1]
+        node-version: [15.14.0]
     steps:
       - name: Checkout
         uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f