diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 26d1df36..54634bf6 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -35,7 +35,7 @@ jobs:
         uses: github/codeql-action/analyze@v3
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.0'
+          ruby-version: '3.3'
           bundler-cache: true
       - name: "Run rufo code formatting checks"
         run: |
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 4e53f786..f33819c5 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -13,14 +13,14 @@ jobs:
     - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version: '3.0'
+        ruby-version: '3.3'
         bundler-cache: true
     - name: Run Yard Doc
       run: |
         gem install yard
         yard doc
     - name: Deploy GH Pages
-      uses: JamesIves/github-pages-deploy-action@v4.5.0
+      uses: JamesIves/github-pages-deploy-action@v4.6.1
       with:
           branch: gh-pages
           folder: doc/
diff --git a/.github/workflows/spec.yml b/.github/workflows/spec.yml
index 1b54754c..ae9c6daa 100644
--- a/.github/workflows/spec.yml
+++ b/.github/workflows/spec.yml
@@ -18,8 +18,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, macos-12]
-        ruby: ['3.0', '3.1', '3.2']
+        os: [ubuntu-latest, macos-latest]
+        ruby: ['3.1', '3.2', '3.3']
     steps:
     - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
@@ -49,5 +49,9 @@ jobs:
       run: |
         bundle exec rspec
       env:
-        COVERAGE: true
         INFURA_TOKEN: ${{ secrets.INFURA_TOKEN }}
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v4
+      with:
+        fail_ci_if_error: false
+        token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/lib/eth/abi/decoder.rb b/lib/eth/abi/decoder.rb
index 5f104c7f..27911a60 100644
--- a/lib/eth/abi/decoder.rb
+++ b/lib/eth/abi/decoder.rb
@@ -51,6 +51,25 @@ def type(type, arg)
               type(Type.parse(type.base_type), arg[pointer + 32, Util.ceil32(data_l) + 32])
             end
           end
+        elsif type.base_type == 'tuple'
+          offset = 0
+          data = {}
+          type.components.each do |c|
+            if c.dynamic?
+              pointer = Util.deserialize_big_endian_to_int arg[offset, 32] # Pointer to the size of the array's element
+              data_len = Util.deserialize_big_endian_to_int arg[pointer, 32] # length of the element
+
+              data[c.name] = type(c, arg[pointer, Util.ceil32(data_len) + 32])
+              # puts data
+              offset += 32
+            else
+              size = c.size
+              data[c.name] = type(c, arg[offset, size])
+              offset += size
+              # puts data
+            end
+          end
+          data
         elsif type.dynamic?
           l = Util.deserialize_big_endian_to_int arg[0, 32]
           nested_sub = type.nested_sub
diff --git a/lib/eth/abi/event.rb b/lib/eth/abi/event.rb
index a3d07ff1..d61b429d 100644
--- a/lib/eth/abi/event.rb
+++ b/lib/eth/abi/event.rb
@@ -126,9 +126,20 @@ def decode_logs(interfaces, logs)
       def decode_log(inputs, data, topics, anonymous = false)
         topic_inputs, data_inputs = inputs.partition { |i| i["indexed"] }
 
-        topic_types = topic_inputs.map { |i| i["type"] }
-        data_types = data_inputs.map { |i| i["type"] }
-
+        topic_types = topic_inputs.map do |i|
+          if i['type'] == 'tuple'
+            Type.parse(i['type'], i['components'], i['name'])
+          else
+            i['type']
+          end
+        end
+        data_types = data_inputs.map do |i|
+          if i['type'] == 'tuple'
+            Type.parse(i['type'], i['components'], i['name'])
+          else
+            i['type']
+          end
+        end
         # If event is anonymous, all topics are arguments. Otherwise, the first
         # topic will be the event signature.
         if anonymous == false
diff --git a/lib/eth/abi/type.rb b/lib/eth/abi/type.rb
index 62b862cd..94ea4013 100644
--- a/lib/eth/abi/type.rb
+++ b/lib/eth/abi/type.rb
@@ -71,7 +71,15 @@ def initialize(base_type, sub_type, dimensions, components = nil, component_name
       # @return [Eth::Abi::Type] a parsed Type object.
       # @raise [ParseError] if it fails to parse the type.
       def parse(type, components = nil, component_name = nil)
-        return type if type.is_a?(Type)
+        if type.is_a?(Type)
+          @base_type = type.base_type
+          @sub_type = type.sub_type
+          @dimensions = type.dimensions
+          @components = type.components
+          @name = type.name
+          return
+        end
+
         _, base_type, sub_type, dimension = /([a-z]*)([0-9]*x?[0-9]*)((\[[0-9]*\])*)/.match(type).to_a
 
         # type dimension can only be numeric
diff --git a/lib/eth/api.rb b/lib/eth/api.rb
index 2b6488b9..fe650154 100644
--- a/lib/eth/api.rb
+++ b/lib/eth/api.rb
@@ -115,7 +115,6 @@ module Api
       "eth_blockNumber",
       "eth_call",
       "eth_chainId",
-      "eth_coinbase",
       "eth_compileLLL",
       "eth_compileSerpent",
       "eth_compileSolidity",
diff --git a/lib/eth/client.rb b/lib/eth/client.rb
index b75bccad..ecd9dff6 100644
--- a/lib/eth/client.rb
+++ b/lib/eth/client.rb
@@ -25,7 +25,7 @@ class Client
     # The connected network's chain ID.
     attr_reader :chain_id
 
-    # The connected network's client coinbase.
+    # The connected network's client default account.
     attr_accessor :default_account
 
     # The default transaction max priority fee per gas in Wei, defaults to {Tx::DEFAULT_PRIORITY_FEE}.
@@ -62,15 +62,15 @@ def initialize(_)
       @max_fee_per_gas = Tx::DEFAULT_GAS_PRICE
     end
 
-    # Gets the default account (coinbase) of the connected client.
+    # Gets the default account (first account) of the connected client.
     #
     # **Note**, that many remote providers (e.g., Infura) do not provide
     # any accounts.
     #
-    # @return [Eth::Address] the coinbase account address.
+    # @return [Eth::Address] the default account address.
     def default_account
       raise ArgumentError, "The default account is not available on remote connections!" unless local? || @default_account
-      @default_account ||= Address.new eth_coinbase["result"]
+      @default_account ||= Address.new eth_accounts["result"].first
     end
 
     # Gets the chain ID of the connected network.
@@ -108,7 +108,7 @@ def resolve_ens(ens_name, registry = Ens::DEFAULT_ADDRESS, coin_type = Ens::Coin
     end
 
     # Simply transfer Ether to an account and waits for it to be mined.
-    # Uses `eth_coinbase` and external signer if no sender key is
+    # Uses `eth_accounts` and external signer if no sender key is
     # provided.
     #
     # See {#transfer} for params and overloads.
@@ -119,7 +119,7 @@ def transfer_and_wait(destination, amount, **kwargs)
     end
 
     # Simply transfer Ether to an account without any call data or
-    # access lists attached. Uses `eth_coinbase` and external signer
+    # access lists attached. Uses `eth_accounts` and external signer
     # if no sender key is provided.
     #
     # **Note**, that many remote providers (e.g., Infura) do not provide
@@ -179,7 +179,7 @@ def transfer_erc20(erc20_contract, destination, amount, **kwargs)
     end
 
     # Deploys a contract and waits for it to be mined. Uses
-    # `eth_coinbase` or external signer if no sender key is provided.
+    # `eth_accounts` or external signer if no sender key is provided.
     #
     # See {#deploy} for params and overloads.
     #
@@ -190,7 +190,7 @@ def deploy_and_wait(contract, *args, **kwargs)
       contract.address = Address.new(addr).to_s
     end
 
-    # Deploys a contract. Uses `eth_coinbase` or external signer
+    # Deploys a contract. Uses `eth_accounts` or external signer
     # if no sender key is provided.
     #
     # **Note**, that many remote providers (e.g., Infura) do not provide
diff --git a/lib/eth/contract/event.rb b/lib/eth/contract/event.rb
index 999e2bc0..60233ee4 100644
--- a/lib/eth/contract/event.rb
+++ b/lib/eth/contract/event.rb
@@ -26,7 +26,9 @@ class Contract::Event
     # @param data [Hash] contract event data.
     def initialize(data)
       @name = data["name"]
-      @input_types = data["inputs"].collect { |x| x["type"] }
+      @input_types = data["inputs"].collect do |x|
+        type_name x
+      end
       @inputs = data["inputs"].collect { |x| x["name"] }
       @event_string = Abi::Event.signature(data)
       @signature = Digest::Keccak.hexdigest(@event_string, 256)
@@ -38,5 +40,16 @@ def initialize(data)
     def set_address(address)
       @address = address.nil? ? nil : Eth::Address.new(address).address
     end
+
+    private
+    def type_name(x)
+      type = x["type"]
+      case type
+      when "tuple"
+        "(#{x['components'].collect { |c| type_name(c) }.join(',')})"
+      else
+        type
+      end
+    end
   end
 end
diff --git a/spec/eth/abi/event_spec.rb b/spec/eth/abi/event_spec.rb
index fe22ba4d..19ed435f 100644
--- a/spec/eth/abi/event_spec.rb
+++ b/spec/eth/abi/event_spec.rb
@@ -247,6 +247,7 @@
       expect(signature).to eq "Transfer(address,address,uint256)"
     end
 
+
     it "generates transfer function signature" do
       abi = erc20_abi.find { |i| i["type"] == "function" && i["name"] == "transfer" }
       signature = Abi::Event.signature(abi)
diff --git a/spec/eth/contract/event_spec.rb b/spec/eth/contract/event_spec.rb
index 043f0032..f5e78c91 100644
--- a/spec/eth/contract/event_spec.rb
+++ b/spec/eth/contract/event_spec.rb
@@ -13,5 +13,85 @@
       expect(contract.events[1].signature).to eq("1f3a0e41bf4d8306f04763663bf025d1824a391571ce3a07186a195f8c4cfd3c")
       expect(contract.events[1].event_string).to eq("killed()")
     end
+
+    it "generates signature for event with tuple params" do
+      event = Eth::Contract::Event.new({
+            "anonymous" => false,
+            "inputs" => [
+                {
+                    "components" => [
+                        {
+                            "internalType" => "uint256",
+                            "name" => "topicId",
+                            "type" => "uint256"
+                        },
+                        {
+                            "internalType" => "uint256",
+                            "name" => "proposalId",
+                            "type" => "uint256"
+                        },
+                        {
+                            "internalType" => "string",
+                            "name" => "name",
+                            "type" => "string"
+                        },
+                        {
+                            "internalType" => "string",
+                            "name" => "symbol",
+                            "type" => "string"
+                        },
+                        {
+                            "internalType" => "uint256",
+                            "name" => "duration",
+                            "type" => "uint256"
+                        },
+                        {
+                            "internalType" => "uint256",
+                            "name" => "totalSupply",
+                            "type" => "uint256"
+                        },
+                        {
+                            "internalType" => "uint256",
+                            "name" => "miniStakeValue",
+                            "type" => "uint256"
+                        },
+                        {
+                            "internalType" => "uint256",
+                            "name" => "maxStakeValue",
+                            "type" => "uint256"
+                        },
+                        {
+                            "internalType" => "uint256",
+                            "name" => "maxParticipants",
+                            "type" => "uint256"
+                        },
+                        {
+                            "internalType" => "uint256",
+                            "name" => "whitelistIndex",
+                            "type" => "uint256"
+                        },
+                        {
+                            "internalType" => "address",
+                            "name" => "proposer",
+                            "type" => "address"
+                        },
+                        {
+                            "internalType" => "bool",
+                            "name" => "useWhitelist",
+                            "type" => "bool"
+                        }
+                    ],
+                    "indexed" => false,
+                    "internalType" => "struct VoteContract.ProposalCreatedParams",
+                    "name" => "params",
+                    "type" => "tuple"
+                }
+            ],
+            "name" => "ProposalCreated",
+            "type" => "event"
+          })
+      expect(event.event_string).to eq('ProposalCreated((uint256,uint256,string,string,uint256,uint256,uint256,uint256,uint256,uint256,address,bool))')
+      expect(event.signature).to eq('4449031b77cbe261580701c097fb63211e768f685581e616330dfff20493536c')
+    end
   end
 end
diff --git a/spec/eth/solidity_spec.rb b/spec/eth/solidity_spec.rb
index 4663f737..106eb2b3 100644
--- a/spec/eth/solidity_spec.rb
+++ b/spec/eth/solidity_spec.rb
@@ -34,7 +34,8 @@
     result = solc.compile contract
     expect(result["DepositContract"]).to be
     payload = result["DepositContract"]["bin"]
-    expect(payload).to start_with "604060808152"
+    expect(payload).to start_with "60"
+    expect(payload).to end_with "33"
     params = {
       from: geth.default_account,
       priority_fee: 0,