diff --git a/near-contract-standards/src/contract_metadata.rs b/near-contract-standards/src/contract_metadata.rs
index c75714482..765d47142 100644
--- a/near-contract-standards/src/contract_metadata.rs
+++ b/near-contract-standards/src/contract_metadata.rs
@@ -1,17 +1,171 @@
+pub use build_info::BuildInfo;
 use near_sdk::serde::{Deserialize, Serialize};
 
-/// The contract source metadata is a standard interface that allows auditing and viewing source code for a deployed smart contract.
-#[derive(Debug, Serialize, Deserialize, PartialEq, Clone)]
+/// The struct provides information about deployed contract's source code and supported standards.
+///
+/// Contract source metadata follows [**NEP-330 standard**](https://github.com/near/NEPs/blob/master/neps/nep-0330.md) for smart contracts
+///
+/// See documentation of [`near_api::types::contract::ContractSourceMetadata`](https://docs.rs/near-api/latest/near_api/types/contract/struct.ContractSourceMetadata.html)
+/// and [`near_api::Contract::contract_source_metadata`](https://docs.rs/near-api/latest/near_api/struct.Contract.html#method.contract_source_metadata)
+/// on how to query this piece of data from a contract via `near_api` crate
+#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize, Deserialize)]
 #[serde(crate = "near_sdk::serde")]
 pub struct ContractSourceMetadata {
+    /// Optional version identifier, typically a semantic version
+    ///
+    /// ## Examples:
+    ///
+    /// ```rust,no_run
+    /// # let version: Option<String> =
+    /// // Semantic version
+    /// Some("1.0.0".into())
+    /// # ;
+    /// ```
+    /// ```rust,no_run
+    /// # let version: Option<String> =
+    /// // Git commit
+    /// Some("39f2d2646f2f60e18ab53337501370dc02a5661c".into())
+    /// # ;
+    /// ```
     pub version: Option<String>,
+    /// Optional URL to source code repository/tree
+    ///
+    /// ## Examples:
+    ///
+    /// ```rust,no_run
+    /// # let link: Option<String> =
+    /// // GitHub URL
+    /// Some("https://github.com/org/repo/tree/8d8a8a0fe86a1d8eb3bce45f04ab1a65fecf5a1b".into())
+    /// # ;
+    /// ```
+    /// ```rust,no_run
+    /// # let link: Option<String> =
+    /// // GitHub URL
+    /// Some("https://github.com/near-examples/nft-tutorial".into())
+    /// # ;
+    /// ```
+    /// ```rust,no_run
+    /// # let link: Option<String> =
+    /// // IPFS CID
+    /// Some("bafybeiemxf5abjwjbikoz4mc3a3dla6ual3jsgpdr4cjr3oz3evfyavhwq".into())
+    /// # ;
+    /// ```
     pub link: Option<String>,
+    /// List of supported NEAR standards (NEPs) with their versions
+    ///
+    /// This field is an addition of **1.1.0** **NEP-330** revision
+    ///
+    /// ## Examples:
+    ///
+    /// This field will always include NEP-330 itself:
+    /// ```rust,no_run
+    /// # use near_contract_standards::contract_metadata::Standard;
+    /// # let link: Vec<Standard> =
+    /// // this is always at least 1.1.0
+    /// vec![Standard { standard: "nep330".into(), version: "1.1.0".into() }]
+    /// # ;
+    /// ```
+    /// ```rust,no_run
+    /// # use near_contract_standards::contract_metadata::Standard;
+    /// # let link: Vec<Standard> =
+    /// vec![Standard { standard: "nep330".into(), version: "1.2.0".into() }]
+    /// # ;
+    /// ```
+    // it's a guess it was added as 1.1.0 of nep330, [nep330 1.1.0 standard recording](https://www.youtube.com/watch?v=pBLN9UyE6AA) actually discusses nep351
     pub standards: Vec<Standard>,
+    /// Optional details that are required for formal contract WASM build reproducibility verification
+    ///
+    /// This field is an addition of **1.2.0** **NEP-330** revision
+    pub build_info: Option<BuildInfo>,
 }
 
-#[derive(Debug, Serialize, Deserialize, PartialEq, Clone)]
+/// NEAR Standard implementation descriptor following [NEP-330](https://github.com/near/NEPs/blob/master/neps/nep-0330.md)    
+#[derive(Debug, Clone, PartialEq, Eq, Default, Serialize, Deserialize)]
 #[serde(crate = "near_sdk::serde")]
 pub struct Standard {
+    /// Standard name in lowercase NEP format
+    ///
+    /// ## Examples:
+    ///
+    /// ```rust,no_run
+    /// # let standard: String =
+    /// // for fungible tokens
+    /// "nep141".into()
+    /// # ;
+    /// ```
     pub standard: String,
+    /// Implemented standard version using semantic versioning
+    ///
+    /// ## Examples:
+    ///
+    /// ```rust,no_run
+    /// # let version: String =
+    /// // for initial release
+    /// "1.0.0".into()
+    /// # ;
+    /// ```
     pub version: String,
 }
+
+mod build_info {
+    use near_sdk::serde::{Deserialize, Serialize};
+
+    /// Defines all required details for formal WASM build reproducibility verification
+    /// according to [**NEP-330 standard 1.2.0 revision**](https://github.com/near/NEPs/blob/master/neps/nep-0330.md)
+    #[derive(Debug, Clone, PartialEq, Eq, Default, Serialize, Deserialize)]
+    #[serde(crate = "near_sdk::serde")]
+    pub struct BuildInfo {
+        /// Reference to a reproducible build environment docker image
+        ///
+        /// ## Examples:
+        ///
+        /// ```rust,no_run
+        /// # let build_environment: String =  
+        ///  "sourcescan/cargo-near:0.13.3-rust-1.84.0@sha256:722198ddb92d1b82cbfcd3a4a9f7fba6fd8715f4d0b5fb236d8725c4883f97de".into()
+        /// # ;
+        /// ```
+        pub build_environment: String,
+        /// The exact command that was used to build the contract, with all the flags
+        ///
+        /// ## Examples:
+        ///
+        /// ```rust,no_run
+        /// # let build_command: Vec<String> =
+        /// vec![
+        ///     "cargo".into(),
+        ///     "near".into(),
+        ///     "build".into(),
+        ///     "non-reproducible-wasm".into(),
+        ///     "--locked".into()
+        /// ]
+        /// # ;
+        /// ```
+        pub build_command: Vec<String>,
+        /// Relative path to contract crate within the source code
+        ///
+        /// ## Examples:
+        ///
+        /// ```rust,no_run
+        /// # let contract_path: String =
+        /// "near/omni-prover/wormhole-omni-prover-proxy".into()
+        /// # ;
+        /// ```
+        /// ```rust,no_run
+        /// # let contract_path: String =
+        /// // root of a repo
+        /// "".into()
+        /// # ;
+        /// ```
+        pub contract_path: String,
+        /// Reference to the source code snapshot that was used to build the contract
+        ///
+        /// ## Examples:
+        ///
+        /// ```rust,no_run
+        /// # let source_code_snapshot: String =
+        /// "git+https://github.com/org/repo?rev=8d8a8a0fe86a1d8eb3bce45f04ab1a65fecf5a1b".into()
+        /// # ;
+        /// ```
+        pub source_code_snapshot: String,
+    }
+}