Add profile card contract example

README.md

@@ -36,6 +36,7 @@ Athena Consulting has been awarded a grant by [Atom Accelerator DAO](https://www
 - [TimeLock Contract](https://github.com/athena-consulting/cosmwasm-by-example/tree/main/timelock)
 - [Crowdfunding Contract](https://github.com/athena-consulting/cosmwasm-by-example/tree/main/crowdfunding)
 - [Token Vault](https://github.com/athena-consulting/cosmwasm-by-example/tree/main/token-vault)
+- [Profile Card](https://github.com/athena-consulting/cosmwasm-by-example/tree/main/profile-card)
 
 ### :three: Complex Applications
 - [Constant Product AMM](https://github.com/athena-consulting/cosmwasm-by-example/tree/main/constant-product-amm)

profile-card/Cargo.toml

@@ -0,0 +1,44 @@
+[package]
+name = "profile-card"
+version = "0.1.0"
+authors = ["gachouchani1999 <gachouchani@ndu.edu.lb>"]
+edition = "2021"
+
+exclude = [
+  "contract.wasm",
+  "hash.txt",
+]
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[profile.release]
+opt-level = 3
+debug = false
+rpath = false
+lto = true
+debug-assertions = false
+codegen-units = 1
+panic = 'abort'
+incremental = false
+overflow-checks = true
+
+[features]
+backtraces = ["cosmwasm-std/backtraces"]
+library = []
+
+[package.metadata.scripts]
+optimize = """docker run --rm -v "$(pwd)":/code \
+  --mount type=volume,source="$(basename "$(pwd)")_cache",target=/code/target \
+  --mount type=volume,source=registry_cache,target=/usr/local/cargo/registry \
+  cosmwasm/rust-optimizer:0.12.10
+"""
+
+[dependencies]
+cosmwasm-schema = "1.1.3"
+cosmwasm-std = "1.1.3"
+cw-storage-plus = "1.0.1"
+cw2 = "1.0.1"
+schemars = "0.8.10"
+serde = { version = "1.0.145", default-features = false, features = ["derive"] }
+thiserror = { version = "1.0.31" }

profile-card/README.md

@@ -0,0 +1,59 @@
+# Profile Card
+
+This contract stores a small public profile for each wallet address. It is a
+simple example of owner-controlled state: every sender can create, update, query,
+list, or clear only their own profile card.
+
+The example demonstrates:
+
+- validating execute message fields before saving state
+- using `Map` to store one record per address
+- removing state with `Map::remove`
+- paginating query results with `start_after` and `limit`
+
+## Instantiate
+
+The contract does not need any setup data.
+
+```rust
+pub struct InstantiateMsg {}
+```
+
+## Execute Messages
+
+`SetProfile` saves a profile for the message sender. Empty optional fields are
+stored as `None`, and the display name must not be empty.
+
+```rust
+SetProfile {
+    display_name: "Alice".to_string(),
+    bio: Some("CosmWasm builder".to_string()),
+    website: Some("https://example.com".to_string()),
+}
+```
+
+`ClearProfile` removes the sender's profile.
+
+```rust
+ClearProfile {}
+```
+
+## Query Messages
+
+`GetProfile` returns a single profile by address.
+
+```rust
+GetProfile {
+    address: "alice".to_string(),
+}
+```
+
+`ListProfiles` returns stored profiles in address order. The query accepts an
+optional `start_after` cursor and a bounded `limit`.
+
+```rust
+ListProfiles {
+    start_after: None,
+    limit: Some(10),
+}
+```

profile-card/src/bin/schema.rs

@@ -0,0 +1,10 @@
+use cosmwasm_schema::write_api;
+use profile_card::msg::{ExecuteMsg, InstantiateMsg, QueryMsg};
+
+fn main() {
+    write_api! {
+        instantiate: InstantiateMsg,
+        execute: ExecuteMsg,
+        query: QueryMsg,
+    }
+}