diff --git a/.vscode/settings.json b/.vscode/settings.json
index 312e964fea..1b74e11869 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,5 +2,8 @@
     "rust-analyzer.rustfmt.extraArgs": [
         "+nightly"
     ],
-    "rust-analyzer.showUnlinkedFileNotification": false
-}
+    "rust-analyzer.showUnlinkedFileNotification": false,
+    "cSpell.words": [
+        "lumio"
+    ]
+}
\ No newline at end of file
diff --git a/api/src/transactions.rs b/api/src/transactions.rs
index 93f7922ff2..18fc2504a4 100644
--- a/api/src/transactions.rs
+++ b/api/src/transactions.rs
@@ -23,8 +23,8 @@ use crate::{
 use anyhow::Context as AnyhowContext;
 use lumio_api_types::{
     transaction::TransactionSummary, verify_function_identifier, verify_module_identifier, Address,
-    LumioError, LumioErrorCode, AsConverter, EncodeSubmissionRequest, GasEstimation,
-    GasEstimationBcs, HashValue, HexEncodedBytes, LedgerInfo, MoveType, PendingTransaction,
+    AsConverter, EncodeSubmissionRequest, GasEstimation, GasEstimationBcs, HashValue,
+    HexEncodedBytes, LedgerInfo, LumioError, LumioErrorCode, MoveType, PendingTransaction,
     SubmitTransactionRequest, Transaction, TransactionData, TransactionOnChainData,
     TransactionsBatchSingleSubmissionFailure, TransactionsBatchSubmissionResult, UserTransaction,
     VerifyInput, VerifyInputWithRecursion, U64,
@@ -40,7 +40,7 @@ use lumio_types::{
         TransactionPayload, TransactionPayloadInner,
     },
     vm_status::StatusCode,
-    LumioCoinType, CoinType,
+    CoinType, LumioCoinType,
 };
 use lumio_vm::{LumioSimulationVM, LumioVM};
 use move_core_types::{ident_str, language_storage::ModuleId, vm_status::VMStatus};
@@ -91,16 +91,20 @@ pub enum SubmitTransactionPost {
 
     // TODO: Since I don't want to impl all the Poem derives on SignedTransaction,
     // find a way to at least indicate in the spec that it expects a SignedTransaction.
-    // TODO: https://github.com/lumio-labs/lumio-core/issues/2275
+    // TODO: https://github.com/aptos-labs/aptos-core/issues/2275
     #[oai(content_type = "application/x.lumio.signed_transaction+bcs")]
     Bcs(Bcs),
+
+    // to support the wallet
+    #[oai(content_type = "application/x.aptos.signed_transaction+bcs")]
+    Old(Bcs),
 }
 
 impl VerifyInput for SubmitTransactionPost {
     fn verify(&self) -> anyhow::Result<()> {
         match self {
             SubmitTransactionPost::Json(inner) => inner.0.verify(),
-            SubmitTransactionPost::Bcs(_) => Ok(()),
+            SubmitTransactionPost::Bcs(_) | SubmitTransactionPost::Old(_) => Ok(()),
         }
     }
 }
@@ -117,6 +121,10 @@ pub enum SubmitTransactionsBatchPost {
     // TODO: https://github.com/lumio-labs/lumio-core/issues/2275
     #[oai(content_type = "application/x.lumio.signed_transaction+bcs")]
     Bcs(Bcs),
+
+    // to support the wallet
+    #[oai(content_type = "application/x.aptos.signed_transaction+bcs")]
+    Old(Bcs),
 }
 
 impl VerifyInput for SubmitTransactionsBatchPost {
@@ -127,7 +135,7 @@ impl VerifyInput for SubmitTransactionsBatchPost {
                     request.verify()?;
                 }
             },
-            SubmitTransactionsBatchPost::Bcs(_) => {},
+            SubmitTransactionsBatchPost::Bcs(_) | SubmitTransactionsBatchPost::Old(_) => {},
         }
         Ok(())
     }
@@ -1184,7 +1192,7 @@ impl TransactionsApi {
         pub const MAX_SIGNED_TRANSACTION_DEPTH: usize = 16;
 
         match data {
-            SubmitTransactionPost::Bcs(data) => {
+            SubmitTransactionPost::Bcs(data) | SubmitTransactionPost::Old(data) => {
                 let signed_transaction: SignedTransaction =
                     bcs::from_bytes_with_limit(&data.0, MAX_SIGNED_TRANSACTION_DEPTH)
                         .context("Failed to deserialize input into SignedTransaction")
@@ -1326,7 +1334,9 @@ impl TransactionsApi {
         data: SubmitTransactionsBatchPost,
     ) -> Result<Vec<SignedTransaction>, SubmitTransactionError> {
         match data {
-            SubmitTransactionsBatchPost::Bcs(data) => {
+            SubmitTransactionsBatchPost::Bcs(data) |
+            SubmitTransactionsBatchPost::Old(data)
+             => {
                 let signed_transactions = bcs::from_bytes(&data.0)
                     .context("Failed to deserialize input into SignedTransaction")
                     .map_err(|err| {
diff --git a/api/src/view_function.rs b/api/src/view_function.rs
index e9c77fd7f8..f61bf14bf7 100644
--- a/api/src/view_function.rs
+++ b/api/src/view_function.rs
@@ -13,14 +13,14 @@ use crate::{
     ApiTags, Context,
 };
 use anyhow::Context as anyhowContext;
+use itertools::Itertools;
 use lumio_api_types::{
-    LumioErrorCode, AsConverter, MoveValue, ViewFunction, ViewRequest, MAX_RECURSIVE_TYPES_ALLOWED,
+    AsConverter, LumioErrorCode, MoveValue, ViewFunction, ViewRequest, MAX_RECURSIVE_TYPES_ALLOWED,
     U64,
 };
 use lumio_bcs_utils::serialize_uleb128;
 use lumio_types::{state_store::StateView, transaction::ViewFunctionError, vm_status::StatusCode};
 use lumio_vm::LumioVM;
-use itertools::Itertools;
 use move_core_types::language_storage::TypeTag;
 use poem_openapi::{param::Query, payload::Json, ApiRequest, OpenApi};
 use std::sync::Arc;
@@ -56,6 +56,10 @@ pub enum ViewFunctionRequest {
 
     #[oai(content_type = "application/x.lumio.view_function+bcs")]
     Bcs(Bcs),
+
+    // to support the wallet
+    #[oai(content_type = "application/x.aptos.view_function+bcs")]
+    Old(Bcs),
 }
 
 #[OpenApi]
@@ -123,7 +127,7 @@ fn view_request(
                     &ledger_info,
                 )
             })?,
-        ViewFunctionRequest::Bcs(data) => {
+        ViewFunctionRequest::Bcs(data) | ViewFunctionRequest::Old(data) => {
             bcs::from_bytes_with_limit(data.0.as_slice(), MAX_RECURSIVE_TYPES_ALLOWED as usize)
                 .context("Failed to deserialize input into ViewRequest")
                 .map_err(|err| {
diff --git a/crates/lumio-crypto/src/hash.rs b/crates/lumio-crypto/src/hash.rs
index 1b2cf05001..a5497801c8 100644
--- a/crates/lumio-crypto/src/hash.rs
+++ b/crates/lumio-crypto/src/hash.rs
@@ -118,7 +118,7 @@ use tiny_keccak::{Hasher, Sha3};
 /// A prefix used to begin the salt of every hashable structure. The salt
 /// consists in this global prefix, concatenated with the specified
 /// serialization name of the struct.
-pub(crate) const HASH_PREFIX: &[u8] = b"LUMIO::";
+pub(crate) const HASH_PREFIX: &[u8] = b"APTOS::";
 
 /// Output value of our hash function. Intentionally opaque for safety and modularity.
 #[derive(Clone, Copy, Eq, Hash, PartialEq, PartialOrd, Ord)]