diff --git a/src/StdPrecompiles.sol b/src/StdPrecompiles.sol
index 64b109d..04d4134 100644
--- a/src/StdPrecompiles.sol
+++ b/src/StdPrecompiles.sol
@@ -4,8 +4,6 @@ pragma solidity >=0.8.20 <0.9.0;
 import {IActivationRegistry} from "./interfaces/IActivationRegistry.sol";
 import {IPolicyRegistry} from "./interfaces/IPolicyRegistry.sol";
 import {IB20Factory} from "./interfaces/IB20Factory.sol";
-import {ITransactionContext} from "./interfaces/ITransactionContext.sol";
-import {INonceManager} from "./interfaces/INonceManager.sol";
 
 /// @title StdPrecompiles
 /// @notice Address constants for Base's singleton precompiles, each paired with an interface-typed
@@ -14,13 +12,8 @@ library StdPrecompiles {
     address internal constant B20_FACTORY_ADDRESS = 0xB20f000000000000000000000000000000000000;
     address internal constant POLICY_REGISTRY_ADDRESS = 0x8453000000000000000000000000000000000002;
     address internal constant ACTIVATION_REGISTRY_ADDRESS = 0x8453000000000000000000000000000000000001;
-    // EIP-8130 system precompiles, in the 0x8130... (EIP number) namespace.
-    address internal constant NONCE_MANAGER_ADDRESS = 0x813000000000000000000000000000000000aa01;
-    address internal constant TX_CONTEXT_ADDRESS = 0x813000000000000000000000000000000000aa02;
 
     IB20Factory internal constant B20_FACTORY = IB20Factory(B20_FACTORY_ADDRESS);
     IPolicyRegistry internal constant POLICY_REGISTRY = IPolicyRegistry(POLICY_REGISTRY_ADDRESS);
     IActivationRegistry internal constant ACTIVATION_REGISTRY = IActivationRegistry(ACTIVATION_REGISTRY_ADDRESS);
-    ITransactionContext internal constant TX_CONTEXT = ITransactionContext(TX_CONTEXT_ADDRESS);
-    INonceManager internal constant NONCE_MANAGER = INonceManager(NONCE_MANAGER_ADDRESS);
 }
diff --git a/src/interfaces/INonceManager.sol b/src/interfaces/INonceManager.sol
deleted file mode 100644
index a2a2369..0000000
--- a/src/interfaces/INonceManager.sol
+++ /dev/null
@@ -1,58 +0,0 @@
-// SPDX-License-Identifier: MIT
-pragma solidity >=0.8.20 <0.9.0;
-
-/// @title INonceManager
-///
-/// @notice Singleton precompile managing the EIP-8130 two-dimensional nonces that enable
-///         concurrent account-abstraction transaction execution. Each `(account, nonceKey)`
-///         channel carries its own independently-ordered sequence nonce. Nonce key `0` is the
-///         protocol nonce; it is held in account state and is not served by this precompile.
-interface INonceManager {
-    /*//////////////////////////////////////////////////////////////
-                                 ERRORS
-    //////////////////////////////////////////////////////////////*/
-
-    /// @notice The precompile was invoked via `DELEGATECALL` or `CALLCODE`.
-    error DelegateCallNotAllowed();
-
-    /// @notice Nonce key `0` is the protocol nonce and is not served by this precompile;
-    ///         read it from account state instead.
-    error ProtocolNonceNotSupported();
-
-    /// @notice Nonce key `0` is reserved for the protocol nonce and cannot be incremented here.
-    error InvalidNonceKey();
-
-    /// @notice The `(account, nonceKey)` channel nonce is already at its maximum value.
-    error NonceOverflow();
-
-    /// @notice An expiring nonce's `validBefore` is outside the allowed `(now, now + maxExpiry]` window.
-    error InvalidExpiringNonceExpiry();
-
-    /// @notice An expiring-nonce replay hash has already been recorded and has not yet expired.
-    error ExpiringNonceReplay();
-
-    /// @notice The expiring-nonce set is full of unexpired entries and cannot accept more.
-    error ExpiringNonceSetFull();
-
-    /*//////////////////////////////////////////////////////////////
-                                 EVENTS
-    //////////////////////////////////////////////////////////////*/
-
-    /// @notice Emitted when the 2D nonce for `(account, nonceKey)` is incremented to `newNonce`.
-    event NonceIncremented(address indexed account, uint256 indexed nonceKey, uint64 newNonce);
-
-    /*//////////////////////////////////////////////////////////////
-                              NONCE QUERIES
-    //////////////////////////////////////////////////////////////*/
-
-    /// @notice Returns the current 2D nonce for `account` at `nonceKey`. A never-used channel
-    ///         reads as `0`.
-    ///
-    /// @dev Reverts with `ProtocolNonceNotSupported` for nonce key `0`.
-    ///
-    /// @param account  Account whose channel nonce is being queried.
-    /// @param nonceKey Non-zero nonce channel to query.
-    ///
-    /// @return The current sequence nonce for the channel.
-    function getNonce(address account, uint256 nonceKey) external view returns (uint64);
-}
diff --git a/src/interfaces/ITransactionContext.sol b/src/interfaces/ITransactionContext.sol
deleted file mode 100644
index d63124b..0000000
--- a/src/interfaces/ITransactionContext.sol
+++ /dev/null
@@ -1,42 +0,0 @@
-// SPDX-License-Identifier: MIT
-pragma solidity >=0.8.20 <0.9.0;
-
-/// @title ITransactionContext
-///
-/// @notice Singleton precompile exposing the resolved context of the in-flight EIP-8130
-///         account-abstraction transaction: its sender, payer, and the actor id resolved while
-///         authenticating the sender. On non-EIP-8130 transactions the context is not populated and
-///         the getters fall back to `tx.origin`: `getTransactionSender` and `getTransactionPayer`
-///         return `tx.origin`, and `getTransactionSenderActorId` returns `bytes32(bytes20(tx.origin))`.
-interface ITransactionContext {
-    /*//////////////////////////////////////////////////////////////
-                                 ERRORS
-    //////////////////////////////////////////////////////////////*/
-
-    /// @notice The precompile was invoked via `DELEGATECALL` or `CALLCODE`.
-    error DelegateCallNotAllowed();
-
-    /*//////////////////////////////////////////////////////////////
-                            CONTEXT QUERIES
-    //////////////////////////////////////////////////////////////*/
-
-    /// @notice The resolved sender of the in-flight transaction. Never reverts; returns
-    ///         `tx.origin` outside of an EIP-8130 transaction.
-    ///
-    /// @return The resolved sender, or `tx.origin`.
-    function getTransactionSender() external view returns (address);
-
-    /// @notice The resolved payer of the in-flight transaction, equal to the sender when the
-    ///         transaction is self-paying. Never reverts; returns `tx.origin` outside of an
-    ///         EIP-8130 transaction.
-    ///
-    /// @return The resolved payer, or `tx.origin`.
-    function getTransactionPayer() external view returns (address);
-
-    /// @notice The actor id resolved while authenticating the sender of the in-flight
-    ///         transaction. Never reverts; returns `bytes32(bytes20(tx.origin))` outside of an
-    ///         EIP-8130 transaction.
-    ///
-    /// @return The resolved sender actor id, or `bytes32(bytes20(tx.origin))`.
-    function getTransactionSenderActorId() external view returns (bytes32);
-}