diff --git a/doc/agent1.png b/doc/agent1.png
new file mode 100644
index 0000000..c4ebdcf
Binary files /dev/null and b/doc/agent1.png differ
diff --git a/doc/agent2.png b/doc/agent2.png
new file mode 100644
index 0000000..f46524d
Binary files /dev/null and b/doc/agent2.png differ
diff --git a/doc/agent3.png b/doc/agent3.png
new file mode 100644
index 0000000..95591c5
Binary files /dev/null and b/doc/agent3.png differ
diff --git a/doc/merchant1.png b/doc/merchant1.png
new file mode 100644
index 0000000..e0c33ac
Binary files /dev/null and b/doc/merchant1.png differ
diff --git a/doc/merchant2.png b/doc/merchant2.png
new file mode 100644
index 0000000..0060eeb
Binary files /dev/null and b/doc/merchant2.png differ
diff --git a/doc/merchant3.png b/doc/merchant3.png
new file mode 100644
index 0000000..4d077bb
Binary files /dev/null and b/doc/merchant3.png differ