diff --git a/assets/js/editor/language.js b/assets/js/editor/language.js
index 0cdbb14..e467be3 100644
--- a/assets/js/editor/language.js
+++ b/assets/js/editor/language.js
@@ -514,6 +514,36 @@ export async function setLanguage(monaco) {
           insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
           documentation: 'Returns the map values'
         },
+
+        // State
+        {
+          label: 'State.get/1',
+          kind: monaco.languages.CompletionItemKind.Snippet,
+          insertText: 'State.get("${1:key}")',
+          insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+          documentation: 'Return the value stored at given key. Return nil if no value'
+        },
+        {
+          label: 'State.get/2',
+          kind: monaco.languages.CompletionItemKind.Snippet,
+          insertText: 'State.get("${1:key}", ${2:default})',
+          insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+          documentation: 'Return the value stored at given key. Return default if no value.'
+        },
+        {
+          label: 'State.set/2',
+          kind: monaco.languages.CompletionItemKind.Snippet,
+          insertText: 'State.set("${1:key}", ${2:value})',
+          insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+          documentation: 'Store the value in the state under given key'
+        },
+        {
+          label: 'State.delete/1',
+          kind: monaco.languages.CompletionItemKind.Snippet,
+          insertText: 'State.delete("${1:key}")',
+          insertTextRules: monaco.languages.CompletionItemInsertTextRule.InsertAsSnippet,
+          documentation: 'Remove the value stored under key from the state'
+        },
         // Time
         {
           label: 'Time.now/0',
diff --git a/lib/archethic_playground.ex b/lib/archethic_playground.ex
index 3ba834c..fcab2a5 100644
--- a/lib/archethic_playground.ex
+++ b/lib/archethic_playground.ex
@@ -2,14 +2,19 @@ defmodule ArchethicPlayground do
   @moduledoc """
   Main module to run the functionality needed
   """
-  alias Archethic.Crypto
+
   alias Archethic.Contracts
   alias Archethic.Contracts.Contract
+  alias Archethic.Contracts.Contract.ActionWithoutTransaction
+  alias Archethic.Contracts.Contract.ActionWithTransaction
+  alias Archethic.Contracts.Contract.Failure
+  alias Archethic.Contracts.Contract.State
+  alias Archethic.Crypto
   alias Archethic.TransactionChain.Transaction
-
+  alias Archethic.TransactionChain.Transaction.ValidationStamp.LedgerOperations.UnspentOutput
+  alias ArchethicPlayground.RecipientForm
   alias ArchethicPlayground.Transaction, as: PlaygroundTransaction
   alias ArchethicPlayground.TriggerForm
-  alias ArchethicPlayground.RecipientForm
   alias ArchethicPlayground.Utils
 
   require Logger
@@ -32,7 +37,8 @@ defmodule ArchethicPlayground do
   @spec execute_function(
           contract_tx :: PlaygroundTransaction.t(),
           function_name :: String.t(),
-          args_values :: list(any())
+          args_values :: list(any()),
+          maybe_state_utxo :: nil | UnspentOutput.t()
         ) ::
           {:ok, any()}
           | {:error, :function_failure}
@@ -42,10 +48,11 @@ defmodule ArchethicPlayground do
   def execute_function(
         contract_tx,
         function_name,
-        args_values
+        args_values,
+        maybe_state_utxo
       ) do
     {:ok, contract} = parse(contract_tx)
-    Contracts.execute_function(contract, function_name, args_values)
+    Contracts.execute_function(contract, function_name, args_values, maybe_state_utxo)
   end
 
   @spec execute(PlaygroundTransaction.t(), TriggerForm.t(), list(Mock.t())) ::
@@ -98,27 +105,36 @@ defmodule ArchethicPlayground do
     ArchethicPlayground.MockFunctions.prepare_mocks(mocks)
 
     with {:ok, contract} <- parse(transaction_contract),
+         maybe_state_utxo <- State.get_utxo_from_transaction(contract.transaction),
          :ok <- check_valid_precondition(trigger, contract, maybe_tx, maybe_recipient, datetime),
-         {:ok, tx_or_nil} <-
+         %ActionWithTransaction{next_tx: next_tx, next_state_utxo: next_state_utxo} <-
            Contracts.execute_trigger(
              trigger,
              contract,
              maybe_tx,
              maybe_recipient,
+             maybe_state_utxo,
              time_now: datetime
            ),
-         :ok <- check_valid_postcondition(contract, tx_or_nil, datetime),
-         tx_or_nil <-
+         :ok <- check_valid_postcondition(contract, next_tx, datetime),
+         next_tx <-
            PlaygroundTransaction.from_archethic(
-             tx_or_nil,
+             next_tx,
+             next_state_utxo,
              transaction_contract.seed,
              1 + transaction_contract.index
            ) do
-      {:ok, tx_or_nil}
+      {:ok, next_tx}
+    else
+      %ActionWithoutTransaction{} ->
+        {:ok, nil}
+
+      %Failure{user_friendly_error: reason} ->
+        {:error, reason}
+
+      {:error, reason} ->
+        {:error, reason}
     end
-  catch
-    {:error, reason} ->
-      {:error, reason}
   end
 
   defp get_time_now(mocks) do
diff --git a/lib/archethic_playground/mock_functions.ex b/lib/archethic_playground/mock_functions.ex
index e7abc59..304845c 100644
--- a/lib/archethic_playground/mock_functions.ex
+++ b/lib/archethic_playground/mock_functions.ex
@@ -42,6 +42,16 @@ defmodule ArchethicPlayground.MockFunctions do
     get_mocked_value("Chain.get_genesis_address/1", [address])
   end
 
+  @impl Library.Common.Chain
+  def get_last_address(address) do
+    get_mocked_value("Chain.get_last_address/1", [address])
+  end
+
+  @impl Library.Common.Chain
+  def get_last_transaction(address) do
+    get_mocked_value("Chain.get_last_transaction/1", [address])
+  end
+
   @impl Library.Common.Chain
   def get_first_transaction_address(address) do
     get_mocked_value("Chain.get_first_transaction_address/1", [address])
diff --git a/lib/archethic_playground/transaction.ex b/lib/archethic_playground/transaction.ex
index 4061abd..c38ce4b 100644
--- a/lib/archethic_playground/transaction.ex
+++ b/lib/archethic_playground/transaction.ex
@@ -8,6 +8,7 @@ defmodule ArchethicPlayground.Transaction do
   alias __MODULE__.Ownership
 
   alias Archethic.Crypto
+  alias Archethic.Contracts.Contract.State
   alias Archethic.TransactionChain.Transaction, as: ArchethicTransaction
   alias Archethic.TransactionChain.TransactionData
   alias Archethic.TransactionChain.TransactionData.Recipient, as: ArchethicRecipient
@@ -24,7 +25,8 @@ defmodule ArchethicPlayground.Transaction do
           token_transfers: list(TokenTransfer.t()),
           ownerships: list(Ownership.t()),
           seed: String.t(),
-          index: non_neg_integer()
+          index: non_neg_integer(),
+          state: String.t()
         }
 
   @derive {Jason.Encoder, except: [:__meta__, :id]}
@@ -35,6 +37,7 @@ defmodule ArchethicPlayground.Transaction do
     field(:validation_timestamp, :string)
     field(:seed, :string)
     field(:index, :integer)
+    field(:state, :string)
     embeds_many(:recipients, Recipient, on_replace: :delete)
     embeds_many(:uco_transfers, UcoTransfer, on_replace: :delete)
     embeds_many(:token_transfers, TokenTransfer, on_replace: :delete)
@@ -53,7 +56,7 @@ defmodule ArchethicPlayground.Transaction do
 
   def changeset(transaction, attrs \\ %{}) do
     transaction
-    |> cast(attrs, [:type, :content, :seed, :index, :code, :validation_timestamp])
+    |> cast(attrs, [:type, :content, :state, :seed, :index, :code, :validation_timestamp])
     |> cast_embed(:uco_transfers)
     |> cast_embed(:token_transfers)
     |> cast_embed(:recipients)
@@ -163,6 +166,10 @@ defmodule ArchethicPlayground.Transaction do
     filter_code? = Keyword.get(opts, :filter_code, false)
 
     Map.from_struct(t)
+    |> Map.update(:state, nil, fn
+      nil -> nil
+      state -> Jason.decode!(state)
+    end)
     |> Enum.reject(fn {key, value} ->
       key in [:__meta__, :seed, :index] || value in [nil, [], ""] ||
         (filter_code? && key == :code)
@@ -248,21 +255,30 @@ defmodule ArchethicPlayground.Transaction do
           ArchethicTransaction.ValidationStamp.generate_dummy()
           | timestamp: Utils.Date.browser_timestamp_to_datetime(t.validation_timestamp),
             ledger_operations: %ArchethicTransaction.ValidationStamp.LedgerOperations{
-              transaction_movements: ArchethicTransaction.get_movements(signed_tx)
+              transaction_movements: ArchethicTransaction.get_movements(signed_tx),
+              unspent_outputs:
+                case extract_state_utxo(t) do
+                  {:ok, nil} -> []
+                  {:ok, state_utxo} -> [state_utxo]
+                  {:error, :invalid_state} -> []
+                end
             }
         }
     }
   end
 
-  def from_archethic(nil, _, _), do: nil
-
-  def from_archethic(t = %ArchethicTransaction{}, seed, index) do
+  def from_archethic(t = %ArchethicTransaction{}, maybe_state_utxo, seed, index) do
     %__MODULE__{
       seed: seed,
       index: index,
       type: Atom.to_string(t.type),
       code: t.data.code,
       content: t.data.content,
+      state:
+        case maybe_state_utxo do
+          nil -> nil
+          state_utxo -> State.from_utxo(state_utxo) |> Jason.encode!()
+        end,
       validation_timestamp:
         if t.validation_stamp != nil do
           Utils.Date.datetime_to_browser_timestamp(t.validation_stamp.timestamp)
@@ -335,4 +351,20 @@ defmodule ArchethicPlayground.Transaction do
 
   defp bin_to_hex(nil), do: nil
   defp bin_to_hex(bin), do: Base.encode16(bin)
+
+  def extract_state_utxo(tx) do
+    case tx.state do
+      nil ->
+        {:ok, nil}
+
+      state_str ->
+        case Jason.decode(state_str) do
+          {:ok, map} when is_map(map) ->
+            State.to_utxo(map)
+
+          _ ->
+            {:error, :invalid_state}
+        end
+    end
+  end
 end
diff --git a/lib/archethic_playground_web/live/components/contract_component.html.heex b/lib/archethic_playground_web/live/components/contract_component.html.heex
index 4725f6f..36bc95c 100644
--- a/lib/archethic_playground_web/live/components/contract_component.html.heex
+++ b/lib/archethic_playground_web/live/components/contract_component.html.heex
@@ -12,6 +12,7 @@
     module={TransactionFormComponent}
     display_mocks={true}
     display_code={false}
+    display_state={true}
     global_variable="contract"
     parent={@myself}
     transaction={@transaction}
diff --git a/lib/archethic_playground_web/live/components/mock_form_component/chain_get_transaction1.html.heex b/lib/archethic_playground_web/live/components/mock_form_component/chain_get_transaction1.html.heex
index db8dbe0..7c0721e 100644
--- a/lib/archethic_playground_web/live/components/mock_form_component/chain_get_transaction1.html.heex
+++ b/lib/archethic_playground_web/live/components/mock_form_component/chain_get_transaction1.html.heex
@@ -10,6 +10,7 @@
       module={TransactionFormComponent}
       display_mocks={true}
       display_code={true}
+      display_state={false}
       global_variable="transaction"
       parent={@myself}
       transaction={@transaction}
diff --git a/lib/archethic_playground_web/live/components/transaction_form_component.html.heex b/lib/archethic_playground_web/live/components/transaction_form_component.html.heex
index da3fb04..1ebd9a3 100644
--- a/lib/archethic_playground_web/live/components/transaction_form_component.html.heex
+++ b/lib/archethic_playground_web/live/components/transaction_form_component.html.heex
@@ -4,6 +4,17 @@
     <.field field={@form[:index]} type="hidden" />
     <.field field={@form[:type]} type="select" options={list_transaction_types()} label="Type*" />
 
+    <%= if @display_state do %>
+      <.field
+        field={@form[:state]}
+        type="textarea"
+        label="State"
+        help_text="Remainder: a contract is always deployed without state"
+      />
+    <% else %>
+      <.field field={@form[:state]} type="hidden" label="State" />
+    <% end %>
+
     <.field field={@form[:content]} type="textarea" label="Content" />
 
     <%= if @display_code do %>
@@ -24,7 +35,12 @@
         <input
           type="text"
           class="pc-text-input"
-          value={ArchethicPlayground.Utils.Address.from_seed_index(input_value(f, :seed), input_value(f, :index))}
+          value={
+            ArchethicPlayground.Utils.Address.from_seed_index(
+              input_value(f, :seed),
+              input_value(f, :index) + 1
+            )
+          }
           disabled
         />
         <div class="pc-form-help-text ">
@@ -184,17 +200,16 @@
         />
 
         <%= if length(input_value(f, :ownerships)) > 0 do %>
-        <div class="pc-form-help-text ">
-          You must encode the secret with an AES key.<br/>
-          Then you must encrypt the AES key for each public key.
-
-          <a href="https://wiki.archethic.net/learn/cryptography/" target="_blank">
-            <.icon
-              name={:question_mark_circle}
-              class="inline text-gray-500 cursor-pointer w-6 h-6"
-            />
-          </a>
-        </div>
+          <div class="pc-form-help-text ">
+            You must encode the secret with an AES key.<br />
+            Then you must encrypt the AES key for each public key.
+            <a href="https://wiki.archethic.net/learn/cryptography/" target="_blank">
+              <.icon
+                name={:question_mark_circle}
+                class="inline text-gray-500 cursor-pointer w-6 h-6"
+              />
+            </a>
+          </div>
         <% end %>
 
         <%= for ownership_form <- inputs_for f, :ownerships do %>
diff --git a/lib/archethic_playground_web/live/components/trigger_component.html.heex b/lib/archethic_playground_web/live/components/trigger_component.html.heex
index 84b8c29..2b11533 100644
--- a/lib/archethic_playground_web/live/components/trigger_component.html.heex
+++ b/lib/archethic_playground_web/live/components/trigger_component.html.heex
@@ -75,6 +75,7 @@
       module={TransactionFormComponent}
       display_mocks={true}
       display_code={true}
+      display_state={false}
       parent={@myself}
       global_variable="transaction"
       transaction={@form[:transaction].value}
diff --git a/lib/archethic_playground_web/live/editor_live.ex b/lib/archethic_playground_web/live/editor_live.ex
index 8674eee..5171221 100644
--- a/lib/archethic_playground_web/live/editor_live.ex
+++ b/lib/archethic_playground_web/live/editor_live.ex
@@ -116,7 +116,11 @@ defmodule ArchethicPlaygroundWeb.EditorLive do
     case ArchethicPlayground.execute_function(
            socket.assigns.transaction_contract,
            function_name,
-           args_values
+           args_values,
+           case Transaction.extract_state_utxo(socket.assigns.transaction_contract) do
+             {:ok, maybe_state_utxo} -> maybe_state_utxo
+             {:error, :invalid_state} -> nil
+           end
          ) do
       {:ok, result} ->
         send(self(), {:console, :success, result})