ecdsa_to_default_account_id func ported from ink_eth_compatibility crate

crates/env/src/api.rs

@@ -36,6 +36,7 @@ use crate::{
     },
     topics::Topics,
     types::Gas,
+    AccountId,
     Environment,
     Result,
 };
@@ -627,3 +628,15 @@ where
 pub fn set_code_hash(code_hash: &[u8; 32]) -> Result<()> {
     <EnvInstance as OnInstance>::on_instance(|instance| instance.set_code_hash(code_hash))
 }
+
+/// Returns the default Substrate's `AccountId` [u8;32] from the ECDSA compressed public key.
+/// It hashes the compressed public key with the `blake2b_256` algorithm like in substrate.
+///
+/// # Note
+///
+/// This function implies a standart `AccountId` type which is [u8;32].
+pub fn ecdsa_to_default_account_id(pubkey: &[u8; 33]) -> AccountId {
+    <EnvInstance as OnInstance>::on_instance(|instance| {
+        instance.ecdsa_to_default_account_id(pubkey)
+    })
+}

crates/env/src/backend.rs

@@ -24,6 +24,7 @@ use crate::{
         HashOutput,
     },
     topics::Topics,
+    AccountId,
     Environment,
     Result,
 };
@@ -303,6 +304,14 @@ pub trait EnvBackend {
     ///
     /// - If the supplied `code_hash` cannot be found on-chain.
     fn set_code_hash(&mut self, code_hash: &[u8]) -> Result<()>;
+
+    /// Returns the default Substrate's `AccountId` ([u8;32]) from the ECDSA compressed public key.
+    /// It hashes the compressed public key with the `blake2b_256` algorithm like in substrate.
+    ///
+    /// # Note
+    ///
+    /// For more details visit: [`ecdsa_to_default_account_id`][`crate::ecdsa_to_default_account_id`]
+    fn ecdsa_to_default_account_id(&mut self, pubkey: &[u8; 33]) -> AccountId;
 }
 
 /// Environmental contract functionality.

crates/env/src/engine/off_chain/impls.rs

@@ -32,6 +32,7 @@ use crate::{
         Topics,
         TopicsBuilderBackend,
     },
+    AccountId,
     Clear,
     EnvBackend,
     Environment,
@@ -342,6 +343,12 @@ impl EnvBackend for EnvInstance {
     fn set_code_hash(&mut self, _code_hash: &[u8]) -> Result<()> {
         unimplemented!("off-chain environment does not support `set_code_hash`")
     }
+
+    fn ecdsa_to_default_account_id(&mut self, pubkey: &[u8; 33]) -> AccountId {
+        let mut output = <Blake2x256 as HashOutput>::Type::default();
+        <Blake2x256 as CryptoHash>::hash(&pubkey[..], &mut output);
+        output.into()
+    }
 }
 
 impl TypedEnvBackend for EnvInstance {

crates/env/src/engine/on_chain/impls.rs

@@ -328,6 +328,12 @@ impl EnvBackend for EnvInstance {
     fn set_code_hash(&mut self, code_hash_ptr: &[u8]) -> Result<()> {
         ext::set_code_hash(code_hash_ptr).map_err(Into::into)
     }
+
+    fn ecdsa_to_default_account_id(&mut self, pubkey: &[u8; 33]) -> AccountId {
+        let mut output = <Blake2x256 as HashOutput>::Type::default();
+        <Blake2x256 as CryptoHash>::hash(&pubkey[..], &mut output);
+        output.into()
+    }
 }
 
 impl TypedEnvBackend for EnvInstance {
@@ -552,4 +558,14 @@ impl TypedEnvBackend for EnvInstance {
         let hash = scale::Decode::decode(&mut &output[..])?;
         Ok(hash)
     }
+
+    fn ecdsa_to_default_account_id<E, H>(&mut self, pubkey: &[u8; 33]) -> E::AccountId
+    where
+        H: CryptoHash,
+        E: Environment,
+    {
+        let mut output = <hash::Blake2x256 as hash::HashOutput>::Type::default();
+        <H as CryptoHash>::hash(pubkey[..], &mut output);
+        output.into()
+    }
 }

crates/lang/src/env_access.rs

@@ -25,6 +25,7 @@ use ink_env::{
         CryptoHash,
         HashOutput,
     },
+    AccountId,
     Environment,
     Error,
     Result,
@@ -1013,4 +1014,14 @@ where
     pub fn own_code_hash(self) -> Result<E::Hash> {
         ink_env::own_code_hash::<E>()
     }
+
+    /// Returns the default Substrate's `AccountId` from the ECDSA compressed public key.
+    /// It hashes the compressed public key with the `blake2b_256` algorithm like in substrate.
+    ///
+    /// # Note
+    ///
+    /// For more details visit: [`ink_env::ecdsa_to_default_account_id`]
+    pub fn ecdsa_to_default_account_id(self, pubkey: &[u8; 33]) -> AccountId {
+        ink_env::ecdsa_to_default_account_id(pubkey)
+    }
 }