feat: nep330 build info field of contract metadata

near-sdk-macros/src/core_impl/contract_metadata/build_info.rs

@@ -0,0 +1,46 @@
+#[derive(serde::Serialize)]
+pub(crate) struct BuildInfo {
+    build_environment: String,
+    build_command: Vec<String>,
+    contract_path: String,
+    source_code_snapshot: String,
+}
+
+const ERR_EMPTY_BUILD_ENVIRONMENT: &str = "`NEP330_BUILD_INFO_BUILD_ENVIRONMENT` is set, \
+                                            but it's set to empty string!";
+const ERR_EMPTY_BUILD_COMMAND: &str = "`NEP330_BUILD_INFO_BUILD_COMMAND` is required, \
+                                        when `NEP330_BUILD_INFO_BUILD_ENVIRONMENT` is set, \
+                                        but it's either not set or empty!";
+const ERR_PARSE_BUILD_COMMAND: &str = "problem parsing `NEP330_BUILD_INFO_BUILD_COMMAND` value";
+
+const ERR_UNSET_CONTRACT_PATH: &str = "`NEP330_BUILD_INFO_CONTRACT_PATH` was provided, \
+                                        but it's not set!";
+
+const ERR_UNSET_OR_EMPTY_SOURCE_SNAPSHOT: &str = "`NEP330_BUILD_INFO_SOURCE_CODE_SNAPSHOT` is \
+                                                    required, when `NEP330_BUILD_INFO_BUILD_ENVIRONMENT` \
+                                                    is set, but it's either not set or empty!";
+
+impl BuildInfo {
+    pub(super) fn from_env() -> Result<Self, String> {
+        let build_environment = std::env::var("NEP330_BUILD_INFO_BUILD_ENVIRONMENT")
+            .ok()
+            .filter(|build_environment| !build_environment.is_empty())
+            .ok_or(ERR_EMPTY_BUILD_ENVIRONMENT.to_string())?;
+
+        let build_command = std::env::var("NEP330_BUILD_INFO_BUILD_COMMAND")
+            .ok()
+            .filter(|build_command| !build_command.is_empty())
+            .ok_or(ERR_EMPTY_BUILD_COMMAND.to_string())?;
+        let build_command: Vec<String> = serde_json::from_str(&build_command)
+            .map_err(|err| format!("{}: {}", ERR_PARSE_BUILD_COMMAND, err))?;
+
+        let source_code_snapshot = std::env::var("NEP330_BUILD_INFO_SOURCE_CODE_SNAPSHOT")
+            .ok()
+            .filter(|source_code_snapshot| !source_code_snapshot.is_empty())
+            .ok_or(ERR_UNSET_OR_EMPTY_SOURCE_SNAPSHOT.to_string())?;
+        let contract_path = std::env::var("NEP330_BUILD_INFO_CONTRACT_PATH")
+            .map_err(|_| ERR_UNSET_CONTRACT_PATH.to_string())?;
+
+        Ok(Self { build_environment, build_command, contract_path, source_code_snapshot })
+    }
+}

near-sdk-macros/src/core_impl/contract_metadata/mod.rs

@@ -1,7 +1,11 @@
+#![allow(clippy::manual_unwrap_or_default)]
+
 use darling::{ast::NestedMeta, Error, FromMeta};
 use proc_macro2::TokenStream;
 use quote::quote;
 
+mod build_info;
+
 #[derive(FromMeta)]
 struct MacroConfig {
     contract_metadata: Option<ContractMetadata>,
@@ -11,8 +15,12 @@ struct MacroConfig {
 pub(crate) struct ContractMetadata {
     version: Option<String>,
     link: Option<String>,
+
     #[darling(multiple, rename = "standard")]
     standards: Vec<Standard>,
+
+    #[darling(skip)]
+    build_info: Option<build_info::BuildInfo>,
 }
 
 impl quote::ToTokens for ContractMetadata {
@@ -47,17 +55,16 @@ struct Standard {
 
 impl ContractMetadata {
     fn populate(mut self) -> Self {
-        if self.version.is_none() {
-            let version = std::env::var("CARGO_PKG_VERSION").unwrap_or(String::from(""));
-            if !version.is_empty() {
-                self.version = Some(version);
+        if self.link.is_none() {
+            let field_val = std::env::var("NEP330_LINK").unwrap_or(String::from(""));
+            if !field_val.is_empty() {
+                self.link = Some(field_val);
             }
         }
-
-        if self.link.is_none() {
-            let repo = std::env::var("CARGO_PKG_REPOSITORY").unwrap_or(String::from(""));
-            if !repo.is_empty() {
-                self.link = Some(repo);
+        if self.version.is_none() {
+            let field_val = std::env::var("NEP330_VERSION").unwrap_or(String::from(""));
+            if !field_val.is_empty() {
+                self.version = Some(field_val);
             }
         }
 
@@ -66,7 +73,14 @@ impl ContractMetadata {
             || self.standards.iter().all(|s| s.standard.to_ascii_lowercase() != "nep330")
         {
             self.standards
-                .push(Standard { standard: "nep330".to_string(), version: "1.1.0".to_string() });
+                .push(Standard { standard: "nep330".to_string(), version: "1.2.0".to_string() });
+        }
+
+        if std::env::var("NEP330_BUILD_INFO_BUILD_ENVIRONMENT").is_ok() {
+            self.build_info = Some(
+                build_info::BuildInfo::from_env()
+                    .expect("Build Details Extension field not provided or malformed"),
+            );
         }
 
         self