diff --git a/docs/build/html/_sources/index.txt b/docs/build/html/_sources/index.txt
index 91fd12c544..a11b6fcd76 100644
--- a/docs/build/html/_sources/index.txt
+++ b/docs/build/html/_sources/index.txt
@@ -37,7 +37,7 @@ Read on to learn:
    :maxdepth: 2
    :caption: Tutorials
 
-   tutorial
+   tutorial_contract
    protocol-state-machines
    oracles
 
diff --git a/docs/build/html/_sources/tutorial.txt b/docs/build/html/_sources/tutorial_contract.txt
similarity index 100%
rename from docs/build/html/_sources/tutorial.txt
rename to docs/build/html/_sources/tutorial_contract.txt
diff --git a/docs/build/html/api/core.messaging/-messaging-service/index.html b/docs/build/html/api/core.messaging/-messaging-service/index.html
index 22be71d9ac..367d2c8140 100644
--- a/docs/build/html/api/core.messaging/-messaging-service/index.html
+++ b/docs/build/html/api/core.messaging/-messaging-service/index.html
@@ -90,7 +90,7 @@ take the registration object, unlike the callback to <a href="add-message-handle
 <td>
 <a href="../send.html">send</a></td>
 <td>
-<code><span class="keyword">fun </span><span class="identifier">MessagingService</span><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/to">to</span><span class="symbol">:</span>&nbsp;<a href="../-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code></td>
+<code><span class="keyword">fun </span><span class="identifier">MessagingService</span><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/to">to</span><span class="symbol">:</span>&nbsp;<a href="../-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code></td>
 </tr>
 </tbody>
 </table>
diff --git a/docs/build/html/api/core.messaging/index.html b/docs/build/html/api/core.messaging/index.html
index 842b8f464b..920b1e6735 100644
--- a/docs/build/html/api/core.messaging/index.html
+++ b/docs/build/html/api/core.messaging/index.html
@@ -114,7 +114,7 @@ take the registration object, unlike the callback to <a href="-messaging-service
 <td>
 <a href="send.html">send</a></td>
 <td>
-<code><span class="keyword">fun </span><a href="-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/to">to</span><span class="symbol">:</span>&nbsp;<a href="-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code></td>
+<code><span class="keyword">fun </span><a href="-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/to">to</span><span class="symbol">:</span>&nbsp;<a href="-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code></td>
 </tr>
 </tbody>
 </table>
diff --git a/docs/build/html/api/core.messaging/send.html b/docs/build/html/api/core.messaging/send.html
index 4b0b0475bb..d073f417e6 100644
--- a/docs/build/html/api/core.messaging/send.html
+++ b/docs/build/html/api/core.messaging/send.html
@@ -7,8 +7,8 @@
 <a href="index.html">core.messaging</a>&nbsp;/&nbsp;<a href=".">send</a><br/>
 <br/>
 <h1>send</h1>
-<a name="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)"></a>
-<code><span class="keyword">fun </span><a href="-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/to">to</span><span class="symbol">:</span>&nbsp;<a href="-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code><br/>
+<a name="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)"></a>
+<code><span class="keyword">fun </span><a href="-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/to">to</span><span class="symbol">:</span>&nbsp;<a href="-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code><br/>
 <br/>
 <br/>
 </BODY>
diff --git a/docs/build/html/api/core.node.subsystems/-artemis-messaging-service/index.html b/docs/build/html/api/core.node.subsystems/-artemis-messaging-service/index.html
index 71604a87c0..fc080f093b 100644
--- a/docs/build/html/api/core.node.subsystems/-artemis-messaging-service/index.html
+++ b/docs/build/html/api/core.node.subsystems/-artemis-messaging-service/index.html
@@ -186,7 +186,7 @@ take the registration object, unlike the callback to <a href="../../core.messagi
 <td>
 <a href="../../core.messaging/send.html">send</a></td>
 <td>
-<code><span class="keyword">fun </span><a href="../../core.messaging/-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/to">to</span><span class="symbol">:</span>&nbsp;<a href="../../core.messaging/-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code></td>
+<code><span class="keyword">fun </span><a href="../../core.messaging/-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/to">to</span><span class="symbol">:</span>&nbsp;<a href="../../core.messaging/-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code></td>
 </tr>
 </tbody>
 </table>
diff --git a/docs/build/html/api/core/index.html b/docs/build/html/api/core/index.html
index 634961ba71..c8e4e9d485 100644
--- a/docs/build/html/api/core/index.html
+++ b/docs/build/html/api/core/index.html
@@ -533,6 +533,13 @@ avoid potential bugs where the value is used in a context where negative numbers
 </tr>
 <tr>
 <td>
+<a href="verify-move-commands.html">verifyMoveCommands</a></td>
+<td>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<a href="-command-data.html"><span class="identifier">CommandData</span></a><span class="symbol">&gt;</span> <span class="identifier">verifyMoveCommands</span><span class="symbol">(</span><span class="identifier" id="core$verifyMoveCommands(kotlin.collections.List((core.OwnableState)), core.TransactionForVerification)/inputs">inputs</span><span class="symbol">:</span>&nbsp;<span class="identifier">List</span><span class="symbol">&lt;</span><a href="-ownable-state/index.html"><span class="identifier">OwnableState</span></a><span class="symbol">&gt;</span><span class="symbol">, </span><span class="identifier" id="core$verifyMoveCommands(kotlin.collections.List((core.OwnableState)), core.TransactionForVerification)/tx">tx</span><span class="symbol">:</span>&nbsp;<a href="-transaction-for-verification/index.html"><span class="identifier">TransactionForVerification</span></a><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code><p>Simple functionality for verifying a move command. Verifies that each input has a signature from its owning key.</p>
+</td>
+</tr>
+<tr>
+<td>
 <a href="verify-to-ledger-transaction.html">verifyToLedgerTransaction</a></td>
 <td>
 <code><span class="keyword">fun </span><a href="-signed-transaction/index.html"><span class="identifier">SignedTransaction</span></a><span class="symbol">.</span><span class="identifier">verifyToLedgerTransaction</span><span class="symbol">(</span><span class="identifier" id="core$verifyToLedgerTransaction(core.SignedTransaction, core.node.services.IdentityService, core.node.services.AttachmentStorage)/identityService">identityService</span><span class="symbol">:</span>&nbsp;<a href="../core.node.services/-identity-service/index.html"><span class="identifier">IdentityService</span></a><span class="symbol">, </span><span class="identifier" id="core$verifyToLedgerTransaction(core.SignedTransaction, core.node.services.IdentityService, core.node.services.AttachmentStorage)/attachmentStorage">attachmentStorage</span><span class="symbol">:</span>&nbsp;<a href="../core.node.services/-attachment-storage/index.html"><span class="identifier">AttachmentStorage</span></a><span class="symbol">)</span><span class="symbol">: </span><a href="-ledger-transaction/index.html"><span class="identifier">LedgerTransaction</span></a></code><p>Calls <a href="#">verify</a> to check all required signatures are present, and then uses the passed <a href="../core.node.services/-identity-service/index.html">IdentityService</a> to call
diff --git a/docs/build/html/api/core/verify-move-commands.html b/docs/build/html/api/core/verify-move-commands.html
new file mode 100644
index 0000000000..573ce80bb3
--- /dev/null
+++ b/docs/build/html/api/core/verify-move-commands.html
@@ -0,0 +1,19 @@
+<HTML>
+<HEAD>
+<title>verifyMoveCommands - </title>
+<link rel="stylesheet" href="../style.css">
+</HEAD>
+<BODY>
+<a href="index.html">core</a>&nbsp;/&nbsp;<a href=".">verifyMoveCommands</a><br/>
+<br/>
+<h1>verifyMoveCommands</h1>
+<a name="core$verifyMoveCommands(kotlin.collections.List((core.OwnableState)), core.TransactionForVerification)"></a>
+<code><span class="keyword">inline</span> <span class="keyword">fun </span><span class="symbol">&lt;</span><span class="keyword">reified</span>&nbsp;<span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<a href="-command-data.html"><span class="identifier">CommandData</span></a><span class="symbol">&gt;</span> <span class="identifier">verifyMoveCommands</span><span class="symbol">(</span><span class="identifier" id="core$verifyMoveCommands(kotlin.collections.List((core.OwnableState)), core.TransactionForVerification)/inputs">inputs</span><span class="symbol">:</span>&nbsp;<span class="identifier">List</span><span class="symbol">&lt;</span><a href="-ownable-state/index.html"><span class="identifier">OwnableState</span></a><span class="symbol">&gt;</span><span class="symbol">, </span><span class="identifier" id="core$verifyMoveCommands(kotlin.collections.List((core.OwnableState)), core.TransactionForVerification)/tx">tx</span><span class="symbol">:</span>&nbsp;<a href="-transaction-for-verification/index.html"><span class="identifier">TransactionForVerification</span></a><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></code><br/>
+<p>Simple functionality for verifying a move command. Verifies that each input has a signature from its owning key.</p>
+<h3>Parameters</h3>
+<a name="T"></a>
+<code>T</code> - the type of the move command<br/>
+<br/>
+<br/>
+</BODY>
+</HTML>
diff --git a/docs/build/html/api/demos.protocols/-exit-server-protocol/-broadcast/index.html b/docs/build/html/api/demos.protocols/-exit-server-protocol/-broadcast/index.html
index 079c2e016e..335307f2ee 100644
--- a/docs/build/html/api/demos.protocols/-exit-server-protocol/-broadcast/index.html
+++ b/docs/build/html/api/demos.protocols/-exit-server-protocol/-broadcast/index.html
@@ -91,8 +91,8 @@ progress.</p>
 <td>
 <a href="../../../core.protocols/-protocol-logic/receive.html">receive</a></td>
 <td>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
 </tr>
 <tr>
 <td>
diff --git a/docs/build/html/api/demos/-trader-demo-protocol-buyer/index.html b/docs/build/html/api/demos/-trader-demo-protocol-buyer/index.html
index c362be7371..3e261ea8f5 100644
--- a/docs/build/html/api/demos/-trader-demo-protocol-buyer/index.html
+++ b/docs/build/html/api/demos/-trader-demo-protocol-buyer/index.html
@@ -98,8 +98,8 @@ progress.</p>
 <td>
 <a href="../../core.protocols/-protocol-logic/receive.html">receive</a></td>
 <td>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
 </tr>
 <tr>
 <td>
diff --git a/docs/build/html/api/demos/-trader-demo-protocol-seller/index.html b/docs/build/html/api/demos/-trader-demo-protocol-seller/index.html
index 0e191d15a6..529de8fcab 100644
--- a/docs/build/html/api/demos/-trader-demo-protocol-seller/index.html
+++ b/docs/build/html/api/demos/-trader-demo-protocol-seller/index.html
@@ -122,8 +122,8 @@ progress.</p>
 <td>
 <a href="../../core.protocols/-protocol-logic/receive.html">receive</a></td>
 <td>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
 </tr>
 <tr>
 <td>
diff --git a/docs/build/html/api/index-outline.html b/docs/build/html/api/index-outline.html
index 7b9b811bc3..2b43a39133 100644
--- a/docs/build/html/api/index-outline.html
+++ b/docs/build/html/api/index-outline.html
@@ -7445,6 +7445,7 @@
 <a href="docs/build/html/api/index"><a href="core/then.html"><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span> <span class="identifier">&lt;ERROR CLASS&gt;</span><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">.</span><span class="identifier">then</span><span class="symbol">(</span><span class="identifier" id="core$then(((core.then.T)), java.util.concurrent.Executor, kotlin.Function0((kotlin.Unit)))/executor">executor</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/Executor.html"><span class="identifier">Executor</span></a><span class="symbol">, </span><span class="identifier" id="core$then(((core.then.T)), java.util.concurrent.Executor, kotlin.Function0((kotlin.Unit)))/body">body</span><span class="symbol">:</span>&nbsp;<span class="symbol">(</span><span class="symbol">)</span>&nbsp;<span class="symbol">-&gt;</span>&nbsp;<span class="identifier">Unit</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">&lt;ERROR CLASS&gt;</span></a></a><br/>
 <a href="docs/build/html/api/index"><a href="core/then.html"><span class="keyword">infix</span> <span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span> <span class="identifier">&lt;ERROR CLASS&gt;</span><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">.</span><span class="identifier">then</span><span class="symbol">(</span><span class="identifier" id="core$then(((core.then.T)), kotlin.Function0((kotlin.Unit)))/body">body</span><span class="symbol">:</span>&nbsp;<span class="symbol">(</span><span class="symbol">)</span>&nbsp;<span class="symbol">-&gt;</span>&nbsp;<span class="identifier">Unit</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">&lt;ERROR CLASS&gt;</span><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></a></a><br/>
 <a href="docs/build/html/api/index"><a href="core/to-ledger-transaction.html"><span class="keyword">fun </span><a href="core/-wire-transaction/index.html"><span class="identifier">WireTransaction</span></a><span class="symbol">.</span><span class="identifier">toLedgerTransaction</span><span class="symbol">(</span><span class="identifier" id="core$toLedgerTransaction(core.WireTransaction, core.node.services.IdentityService, core.node.services.AttachmentStorage)/identityService">identityService</span><span class="symbol">:</span>&nbsp;<a href="core.node.services/-identity-service/index.html"><span class="identifier">IdentityService</span></a><span class="symbol">, </span><span class="identifier" id="core$toLedgerTransaction(core.WireTransaction, core.node.services.IdentityService, core.node.services.AttachmentStorage)/attachmentStorage">attachmentStorage</span><span class="symbol">:</span>&nbsp;<a href="core.node.services/-attachment-storage/index.html"><span class="identifier">AttachmentStorage</span></a><span class="symbol">)</span><span class="symbol">: </span><a href="core/-ledger-transaction/index.html"><span class="identifier">LedgerTransaction</span></a></a></a><br/>
+<a href="docs/build/html/api/index"><a href="core/verify-move-commands.html"><span class="keyword">inline</span> <span class="keyword">fun </span><span class="symbol">&lt;</span><span class="keyword">reified</span>&nbsp;<span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<a href="core/-command-data.html"><span class="identifier">CommandData</span></a><span class="symbol">&gt;</span> <span class="identifier">verifyMoveCommands</span><span class="symbol">(</span><span class="identifier" id="core$verifyMoveCommands(kotlin.collections.List((core.OwnableState)), core.TransactionForVerification)/inputs">inputs</span><span class="symbol">:</span>&nbsp;<span class="identifier">List</span><span class="symbol">&lt;</span><a href="core/-ownable-state/index.html"><span class="identifier">OwnableState</span></a><span class="symbol">&gt;</span><span class="symbol">, </span><span class="identifier" id="core$verifyMoveCommands(kotlin.collections.List((core.OwnableState)), core.TransactionForVerification)/tx">tx</span><span class="symbol">:</span>&nbsp;<a href="core/-transaction-for-verification/index.html"><span class="identifier">TransactionForVerification</span></a><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></a></a><br/>
 <a href="docs/build/html/api/index"><a href="core/verify-to-ledger-transaction.html"><span class="keyword">fun </span><a href="core/-signed-transaction/index.html"><span class="identifier">SignedTransaction</span></a><span class="symbol">.</span><span class="identifier">verifyToLedgerTransaction</span><span class="symbol">(</span><span class="identifier" id="core$verifyToLedgerTransaction(core.SignedTransaction, core.node.services.IdentityService, core.node.services.AttachmentStorage)/identityService">identityService</span><span class="symbol">:</span>&nbsp;<a href="core.node.services/-identity-service/index.html"><span class="identifier">IdentityService</span></a><span class="symbol">, </span><span class="identifier" id="core$verifyToLedgerTransaction(core.SignedTransaction, core.node.services.IdentityService, core.node.services.AttachmentStorage)/attachmentStorage">attachmentStorage</span><span class="symbol">:</span>&nbsp;<a href="core.node.services/-attachment-storage/index.html"><span class="identifier">AttachmentStorage</span></a><span class="symbol">)</span><span class="symbol">: </span><a href="core/-ledger-transaction/index.html"><span class="identifier">LedgerTransaction</span></a></a></a><br/>
 </BODY>
 </HTML>
@@ -7886,7 +7887,7 @@
 </HTML>
 </ul>
 <a href="docs/build/html/api/index"><a href="core.messaging/run-on-next-message.html"><span class="keyword">fun </span><a href="core.messaging/-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">runOnNextMessage</span><span class="symbol">(</span><span class="identifier" id="core.messaging$runOnNextMessage(core.messaging.MessagingService, kotlin.String, java.util.concurrent.Executor, kotlin.Function1((core.messaging.Message, kotlin.Unit)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span>&nbsp;<span class="symbol">=</span>&nbsp;""<span class="symbol">, </span><span class="identifier" id="core.messaging$runOnNextMessage(core.messaging.MessagingService, kotlin.String, java.util.concurrent.Executor, kotlin.Function1((core.messaging.Message, kotlin.Unit)))/executor">executor</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/Executor.html"><span class="identifier">Executor</span></a><span class="symbol">?</span>&nbsp;<span class="symbol">=</span>&nbsp;null<span class="symbol">, </span><span class="identifier" id="core.messaging$runOnNextMessage(core.messaging.MessagingService, kotlin.String, java.util.concurrent.Executor, kotlin.Function1((core.messaging.Message, kotlin.Unit)))/callback">callback</span><span class="symbol">:</span>&nbsp;<span class="symbol">(</span><a href="core.messaging/-message/index.html"><span class="identifier">Message</span></a><span class="symbol">)</span>&nbsp;<span class="symbol">-&gt;</span>&nbsp;<span class="identifier">Unit</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></a></a><br/>
-<a href="docs/build/html/api/index"><a href="core.messaging/send.html"><span class="keyword">fun </span><a href="core.messaging/-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/to">to</span><span class="symbol">:</span>&nbsp;<a href="core.messaging/-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, core.messaging.MessageRecipients, kotlin.Any)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></a></a><br/>
+<a href="docs/build/html/api/index"><a href="core.messaging/send.html"><span class="keyword">fun </span><a href="core.messaging/-messaging-service/index.html"><span class="identifier">MessagingService</span></a><span class="symbol">.</span><span class="identifier">send</span><span class="symbol">(</span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/obj">obj</span><span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">, </span><span class="identifier" id="core.messaging$send(core.messaging.MessagingService, kotlin.String, kotlin.Any, core.messaging.MessageRecipients)/to">to</span><span class="symbol">:</span>&nbsp;<a href="core.messaging/-message-recipients.html"><span class="identifier">MessageRecipients</span></a><span class="symbol">)</span><span class="symbol">: </span><span class="identifier">Unit</span></a></a><br/>
 </BODY>
 </HTML>
 </ul>
diff --git a/docs/build/html/api/protocols/-two-party-deal-protocol/-secondary/index.html b/docs/build/html/api/protocols/-two-party-deal-protocol/-secondary/index.html
index a0b72d2ad4..3c3d8716ff 100644
--- a/docs/build/html/api/protocols/-two-party-deal-protocol/-secondary/index.html
+++ b/docs/build/html/api/protocols/-two-party-deal-protocol/-secondary/index.html
@@ -152,8 +152,8 @@ progress.</p>
 <td>
 <a href="../../../core.protocols/-protocol-logic/receive.html">receive</a></td>
 <td>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
 </tr>
 <tr>
 <td>
diff --git a/docs/build/html/api/protocols/-two-party-trade-protocol/-buyer/index.html b/docs/build/html/api/protocols/-two-party-trade-protocol/-buyer/index.html
index dfb5064efb..d4146a7ebd 100644
--- a/docs/build/html/api/protocols/-two-party-trade-protocol/-buyer/index.html
+++ b/docs/build/html/api/protocols/-two-party-trade-protocol/-buyer/index.html
@@ -140,8 +140,8 @@ progress.</p>
 <td>
 <a href="../../../core.protocols/-protocol-logic/receive.html">receive</a></td>
 <td>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
-<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long)/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code><br/>
+<code><span class="keyword">fun </span><span class="symbol">&lt;</span><span class="identifier">T</span>&nbsp;<span class="symbol">:</span>&nbsp;<span class="identifier">Any</span><span class="symbol">&gt;</span> <span class="identifier">receive</span><span class="symbol">(</span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/topic">topic</span><span class="symbol">:</span>&nbsp;<span class="identifier">String</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/sessionIDForReceive">sessionIDForReceive</span><span class="symbol">:</span>&nbsp;<span class="identifier">Long</span><span class="symbol">, </span><span class="identifier" id="core.protocols.ProtocolLogic$receive(kotlin.String, kotlin.Long, java.lang.Class((core.protocols.ProtocolLogic.receive.T)))/clazz">clazz</span><span class="symbol">:</span>&nbsp;<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Class.html"><span class="identifier">Class</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span><span class="symbol">)</span><span class="symbol">: </span><a href="../../../core.utilities/-untrustworthy-data/index.html"><span class="identifier">UntrustworthyData</span></a><span class="symbol">&lt;</span><span class="identifier">T</span><span class="symbol">&gt;</span></code></td>
 </tr>
 <tr>
 <td>
diff --git a/docs/build/html/codestyle.html b/docs/build/html/codestyle.html
index b6acc34b5a..d4f766b4ef 100644
--- a/docs/build/html/codestyle.html
+++ b/docs/build/html/codestyle.html
@@ -97,7 +97,7 @@
 </ul>
 <p class="caption"><span class="caption-text">Tutorials</span></p>
 <ul>
-<li class="toctree-l1"><a class="reference internal" href="tutorial.html">Writing a contract</a></li>
+<li class="toctree-l1"><a class="reference internal" href="tutorial_contract.html">Writing a contract</a></li>
 <li class="toctree-l1"><a class="reference internal" href="protocol-state-machines.html">Protocol state machines</a></li>
 <li class="toctree-l1"><a class="reference internal" href="oracles.html">Writing oracle services</a></li>
 </ul>
diff --git a/docs/build/html/genindex.html b/docs/build/html/genindex.html
index 0223903aae..e33296256b 100644
--- a/docs/build/html/genindex.html
+++ b/docs/build/html/genindex.html
@@ -96,7 +96,7 @@
 </ul>
 <p class="caption"><span class="caption-text">Tutorials</span></p>
 <ul>
-<li class="toctree-l1"><a class="reference internal" href="tutorial.html">Writing a contract</a></li>
+<li class="toctree-l1"><a class="reference internal" href="tutorial_contract.html">Writing a contract</a></li>
 <li class="toctree-l1"><a class="reference internal" href="protocol-state-machines.html">Protocol state machines</a></li>
 <li class="toctree-l1"><a class="reference internal" href="oracles.html">Writing oracle services</a></li>
 </ul>
diff --git a/docs/build/html/index.html b/docs/build/html/index.html
index f7f1713229..60a2b393d7 100644
--- a/docs/build/html/index.html
+++ b/docs/build/html/index.html
@@ -96,7 +96,7 @@
 </ul>
 <p class="caption"><span class="caption-text">Tutorials</span></p>
 <ul>
-<li class="toctree-l1"><a class="reference internal" href="tutorial.html">Writing a contract</a></li>
+<li class="toctree-l1"><a class="reference internal" href="tutorial_contract.html">Writing a contract</a></li>
 <li class="toctree-l1"><a class="reference internal" href="protocol-state-machines.html">Protocol state machines</a></li>
 <li class="toctree-l1"><a class="reference internal" href="oracles.html">Writing oracle services</a></li>
 </ul>
@@ -211,16 +211,16 @@ prove or disprove the following hypothesis:</p>
 <div class="toctree-wrapper compound" id="tutorials">
 <p class="caption"><span class="caption-text">Tutorials</span><a class="headerlink" href="#tutorials" title="Permalink to this toctree">¶</a></p>
 <ul>
-<li class="toctree-l1"><a class="reference internal" href="tutorial.html">Writing a contract</a><ul>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#starting-the-commercial-paper-class">Starting the commercial paper class</a></li>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#states">States</a></li>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#commands">Commands</a></li>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#the-verify-function">The verify function</a></li>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#using-state-groups">Using state groups</a></li>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#checking-the-requirements">Checking the requirements</a></li>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#how-to-test-your-contract">How to test your contract</a></li>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#adding-a-generation-api-to-your-contract">Adding a generation API to your contract</a></li>
-<li class="toctree-l2"><a class="reference internal" href="tutorial.html#non-asset-oriented-based-smart-contracts">Non-asset-oriented based smart contracts</a></li>
+<li class="toctree-l1"><a class="reference internal" href="tutorial_contract.html">Writing a contract</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#starting-the-commercial-paper-class">Starting the commercial paper class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#states">States</a></li>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#commands">Commands</a></li>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#the-verify-function">The verify function</a></li>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#using-state-groups">Using state groups</a></li>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#checking-the-requirements">Checking the requirements</a></li>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#how-to-test-your-contract">How to test your contract</a></li>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#adding-a-generation-api-to-your-contract">Adding a generation API to your contract</a></li>
+<li class="toctree-l2"><a class="reference internal" href="tutorial_contract.html#non-asset-oriented-based-smart-contracts">Non-asset-oriented based smart contracts</a></li>
 </ul>
 </li>
 <li class="toctree-l1"><a class="reference internal" href="protocol-state-machines.html">Protocol state machines</a><ul>
diff --git a/docs/build/html/objects.inv b/docs/build/html/objects.inv
index 75ff139077..017b5207d5 100644
Binary files a/docs/build/html/objects.inv and b/docs/build/html/objects.inv differ
diff --git a/docs/build/html/search.html b/docs/build/html/search.html
index a8eb5452e2..ee936e8720 100644
--- a/docs/build/html/search.html
+++ b/docs/build/html/search.html
@@ -95,7 +95,7 @@
 </ul>
 <p class="caption"><span class="caption-text">Tutorials</span></p>
 <ul>
-<li class="toctree-l1"><a class="reference internal" href="tutorial.html">Writing a contract</a></li>
+<li class="toctree-l1"><a class="reference internal" href="tutorial_contract.html">Writing a contract</a></li>
 <li class="toctree-l1"><a class="reference internal" href="protocol-state-machines.html">Protocol state machines</a></li>
 <li class="toctree-l1"><a class="reference internal" href="oracles.html">Writing oracle services</a></li>
 </ul>
diff --git a/docs/build/html/searchindex.js b/docs/build/html/searchindex.js
index ad6cf9b921..75b71c6391 100644
--- a/docs/build/html/searchindex.js
+++ b/docs/build/html/searchindex.js
@@ -1 +1 @@
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\ No newline at end of file
diff --git a/docs/build/html/tutorial.html b/docs/build/html/tutorial_contract.html
similarity index 99%
rename from docs/build/html/tutorial.html
rename to docs/build/html/tutorial_contract.html
index cb738bc372..f89f022eda 100644
--- a/docs/build/html/tutorial.html
+++ b/docs/build/html/tutorial_contract.html
@@ -151,7 +151,7 @@
       <li class="wy-breadcrumbs-aside">
         
           
-            <a href="_sources/tutorial.txt" rel="nofollow"> View page source</a>
+            <a href="_sources/tutorial_contract.txt" rel="nofollow"> View page source</a>
           
         
       </li>
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 91fd12c544..a11b6fcd76 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -37,7 +37,7 @@ Read on to learn:
    :maxdepth: 2
    :caption: Tutorials
 
-   tutorial
+   tutorial_contract
    protocol-state-machines
    oracles
 
diff --git a/docs/source/tutorial.rst b/docs/source/tutorial_contract.rst
similarity index 100%
rename from docs/source/tutorial.rst
rename to docs/source/tutorial_contract.rst