Sylvia: Describe IBC support

src/pages/sylvia/basics/_meta.json

@@ -1,6 +1,7 @@
 {
-  "getting-started": "Getting started",
-  "generate-contract": "Generate contract",
-  "contract-structure": "Contract structure",
-  "interoperability": "Interoperability"
+    "getting-started": "Getting started",
+    "generate-contract": "Generate contract",
+    "contract-structure": "Contract structure",
+    "interoperability": "Interoperability",
+    "ibc": "Ibc"
 }

src/pages/sylvia/basics/contract-structure.mdx

@@ -1,5 +1,5 @@
 ---
-tags: ["sylvia", "basics"]
+tags: ["sylvia"]
 ---
 
 # Contract structure

src/pages/sylvia/basics/generate-contract.mdx

@@ -1,5 +1,5 @@
 ---
-tags: ["sylvia", "basics"]
+tags: ["sylvia"]
 ---
 
 # Generate contract

src/pages/sylvia/basics/getting-started.mdx

@@ -1,5 +1,5 @@
 ---
-tags: ["sylvia", "basics"]
+tags: ["sylvia"]
 ---
 
 import { Callout } from "nextra/components";

src/pages/sylvia/basics/ibc.mdx

@@ -0,0 +1,88 @@
+---
+tags: ["sylvia", "ibc"]
+---
+
+import { Callout } from "nextra/components";
+
+# IBC
+
+Sylvia doesn't generate any [IBC](../../ibc) related code, but you can define
+your own [IBC entry points](../../ibc/diy-protocol#Entrypoints) like you would
+in the case of a regular CosmWasm contract.
+
+You can define the logic inside the contract and call the method from the entry
+point.
+
+```rust {14-21, 32, 30}
+pub struct IbcContract;
+
+#[contract]
+impl IbcContract {
+    pub fn new() -> Self {
+        Self
+    }
+
+    #[sv::msg(instantiate)]
+    fn instantiate(&self, _ctx: InstantiateCtx) -> StdResult<Response> {
+        Ok(Response::new())
+    }
+
+    pub fn ibc_channel_open(
+        &self,
+        deps: DepsMut,
+        env: Env,
+        msg: IbcChannelOpenMsg,
+    ) -> StdResult<IbcChannelOpenResponse> {
+        // Your logic here
+    }
+}
+
+#[cfg_attr(not(feature = "library"), entry_point)]
+pub fn ibc_channel_open(
+    deps: DepsMut,
+    env: Env,
+    msg: IbcChannelOpenMsg,
+) -> StdResult<IbcChannelOpenResponse> {
+    IbcContract::new().ibc_channel_open(deps, env, msg)
+}
+```
+
+You can also define a trait for the IBC methods and implement it for on the
+contract.
+
+```rust {7, 10, 12-13, 21-22}
+#[cfg_attr(not(feature = "library"), entry_point)]
+pub fn ibc_channel_open(
+    deps: DepsMut,
+    env: Env,
+    msg: IbcChannelOpenMsg,
+) -> StdResult<IbcChannelOpenResponse> {
+    IbcContract::new().ibc_channel_open(deps, env, msg)
+}
+
+pub struct IbcContract;
+
+pub trait Ibc {
+    fn ibc_channel_open(
+        &self,
+        deps: DepsMut,
+        env: Env,
+        msg: IbcChannelOpenMsg,
+    ) -> StdResult<IbcChannelOpenResponse>;
+}
+
+impl Ibc for IbcContract {
+    fn ibc_channel_open(
+        &self,
+        deps: DepsMut,
+        env: Env,
+        msg: IbcChannelOpenMsg,
+    ) -> StdResult<IbcChannelOpenResponse> {
+        // Your logic here
+    }
+}
+```
+
+Remember not to use the interface attribute for this trait. Sylvia does not
+handle IBC entry points, and there is no point in generating helpers around
+them.