Update terra sdk api to use Addr (#51)

Addr is a checked version of String in cw ecosystem

Author: ali-behjati

examples/terra-contract/Cargo.toml

@@ -34,7 +34,7 @@ cosmwasm-storage = { version = "0.16.0" }
 cw-storage-plus = "0.8.0"
 schemars = "0.8"
 serde = { version = "1.0", default-features = false, features = ["derive"] }
-pyth-sdk-terra = { version = "0.3.0", path = "../../pyth-sdk-terra" } # Remove path and use version only when you use this example on your own.
+pyth-sdk-terra = { version = "0.4.0", path = "../../pyth-sdk-terra" } # Remove path and use version only when you use this example on your own.
 
 [dev-dependencies]
 cosmwasm-schema = { version = "0.16.0" }

examples/terra-contract/Developing.md

@@ -22,8 +22,8 @@ rustup target add wasm32-unknown-unknown
 This example uses relative paths in `Cargo.toml`; you must remove any `path` components within `Cargo.toml` dependencies if you intend to compile this code outside of the `pyth-sdk-terra` repository, otherwise this will fail to compile. For example:
 
 ```diff
-- pyth-sdk-terra = { version = "0.3.0", path = "../../pyth-sdk-terra" }
-+ pyth-sdk-terra = { version = "0.3.0" }
+- pyth-sdk-terra = { version = "0.4.0", path = "../../pyth-sdk-terra" }
++ pyth-sdk-terra = { version = "0.4.0" }
 ```
 
 ## Compiling

examples/terra-contract/src/contract.rs

@@ -80,12 +80,8 @@ fn query_fetch_price(deps: Deps) -> StdResult<FetchPriceResponse> {
     // price feed. The result is a PriceFeed object with fields for the current price and other
     // useful information. The function will fail if the contract address or price feed id are
     // invalid.
-    let price_feed = query_price_feed(
-        &deps.querier,
-        state.pyth_contract_addr.into_string(),
-        state.price_feed_id,
-    )?
-    .price_feed;
+    let price_feed =
+        query_price_feed(&deps.querier, state.pyth_contract_addr, state.price_feed_id)?.price_feed;
 
     // Get the current price and confidence interval from the price feed.
     // This function returns None if the price is not currently available.

pyth-sdk-terra/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pyth-sdk-terra"
-version = "0.3.1"
+version = "0.4.0"
 authors = ["Pyth Data Foundation"]
 edition = "2018"
 license = "Apache-2.0"

pyth-sdk-terra/README.md

@@ -20,7 +20,7 @@ Simply call the `query_price_feed` function in your Terra contract with a price
 
 ```rust
 // Pyth network testnet contract address
-pyth_contract_addr: string = "terra1wzs3rgzgjdde3kg7k3aaz6qx7sc5dcwxqe9fuc";
+pyth_contract_addr = deps.api.addr_validate("terra1wzs3rgzgjdde3kg7k3aaz6qx7sc5dcwxqe9fuc")?;
 // Price feed id for BTC/USD on testnet
 price_feed_id = PriceIdentifier::from_hex("f9c0172ba10dfa4d19088d94f5bf61d3b54d5bd7483a322a982e1373ee8ea31b");
 

pyth-sdk-terra/src/lib.rs

@@ -1,5 +1,6 @@
 use cosmwasm_std::{
     to_binary,
+    Addr,
     QuerierWrapper,
     QueryRequest,
     StdResult,
@@ -35,12 +36,12 @@ pub struct PriceFeedResponse {
 /// Queries the price on-chain
 pub fn query_price_feed(
     querier: &QuerierWrapper,
-    contract_addr: String,
+    contract_addr: Addr,
     id: PriceIdentifier,
 ) -> StdResult<PriceFeedResponse> {
     let price_feed_response = querier.query(&QueryRequest::Wasm(WasmQuery::Smart {
-        contract_addr,
-        msg: to_binary(&QueryMsg::PriceFeed { id })?,
+        contract_addr: contract_addr.into_string(),
+        msg:           to_binary(&QueryMsg::PriceFeed { id })?,
     }))?;
     Ok(price_feed_response)
 }