Docs: Update overall design en
remove an extra full stop.
@@ -37,7 +37,7 @@ Figure 3-1 The position of BoAT in the blockchain interactive network<br>
## BoAT implementation framework
BoAT follows a hierarchical design, which is divided into interface layer, protocol layer, RPC layer, hardware dependency layer, general tools and utility programs. among them:
-+ The interface provided by the interface layer is for users to access the corresponding blockchain..
++ The interface provided by the interface layer is for users to access the corresponding blockchain.
+ The protocol layer provides blockchain adpatation services to the interface layer.
+ The RPC layer provides remote process call services to the protocol layer.
+ The hardware dependency layer provides encryption, signature, storage and other services for the wallet at the interface layer.
