diff --git a/packages/contract.cm/src/onchain/contract.ts b/packages/contract.cm/src/onchain/contract.ts
index 7cad51e..800500b 100644
--- a/packages/contract.cm/src/onchain/contract.ts
+++ b/packages/contract.cm/src/onchain/contract.ts
@@ -1,31 +1,9 @@
-import { SELF_REGISTER_HANDLER_NAME } from '@coinweb/contract-kit';
-import { selfRegisterHandler } from '@coinweb/self-register';
-import { addMethodHandler, ContractHandlers, executeHandler, executor } from 'cwait';
+import { constructCwebMain } from 'cwait';
 
 import { PUBLIC_METHODS } from '../offchain/shared';
 
 import { addWord } from './addWord';
-import { mutexLock } from './mutex/lock';
-import { mutexUnlock, mutexUnlockExec } from './mutex/unlock';
 
-const createModule = (): ContractHandlers => {
-  const module: ContractHandlers = { handlers: {} };
-
-  addMethodHandler(module, PUBLIC_METHODS.ADD_WORD, executor(addWord));
-
-  addMethodHandler(module, '_lock', mutexLock);
-  addMethodHandler(module, '_unlock', mutexUnlock);
-  addMethodHandler(module, '_unlock_exec', mutexUnlockExec);
-
-  addMethodHandler(module, SELF_REGISTER_HANDLER_NAME, selfRegisterHandler);
-
-  return module;
-};
-
-export const cwebMain = () => {
-  return (async () => {
-    const module = createModule();
-
-    await executeHandler(module);
-  })();
-};
+export const cwebMain = constructCwebMain({
+  [PUBLIC_METHODS.ADD_WORD]: addWord,
+});
diff --git a/packages/contract.cm/src/onchain/mutex/access.ts b/packages/contract.cm/src/onchain/mutex/access.ts
deleted file mode 100644
index c308620..0000000
--- a/packages/contract.cm/src/onchain/mutex/access.ts
+++ /dev/null
@@ -1 +0,0 @@
-export const mutexAccess = () => {};
diff --git a/packages/contract.cm/src/onchain/mutex/lock.ts b/packages/contract.cm/src/onchain/mutex/lock.ts
deleted file mode 100644
index a4d2b64..0000000
--- a/packages/contract.cm/src/onchain/mutex/lock.ts
+++ /dev/null
@@ -1,43 +0,0 @@
-import {
-  constructClaim,
-  constructClaimKey,
-  constructContinueTx,
-  constructContractIssuer,
-  constructContractRef,
-  constructStore,
-  Context,
-  extractContractInfo,
-  getContractId,
-} from '@coinweb/contract-kit';
-
-export const mutexLock = (context: Context) => {
-  const { providedCweb } = extractContractInfo(context.tx);
-  const issuer = constructContractIssuer(getContractId(context.tx));
-
-  return [
-    constructContinueTx(
-      context,
-      [
-        constructStore(
-          constructClaim(constructClaimKey('mutex', context.call.txid.slice(0, 8)), { word: 'CLASH' }, '0x0')
-        ),
-      ],
-      [
-        {
-          callInfo: {
-            ref: constructContractRef(issuer, []),
-            methodInfo: {
-              methodName: '_unlock',
-              methodArgs: [],
-            },
-            contractInfo: {
-              providedCweb: providedCweb ? providedCweb - 1000n : 1000n,
-              authenticated: null,
-            },
-            contractArgs: [],
-          },
-        },
-      ]
-    ),
-  ];
-};
diff --git a/packages/contract.cm/src/onchain/mutex/unlock.ts b/packages/contract.cm/src/onchain/mutex/unlock.ts
deleted file mode 100644
index 2f3ccdb..0000000
--- a/packages/contract.cm/src/onchain/mutex/unlock.ts
+++ /dev/null
@@ -1,59 +0,0 @@
-import {
-  constructContinueTx,
-  constructContractIssuer,
-  constructContractRef,
-  constructRangeRead,
-  constructTake,
-  Context,
-  extractContractArgs,
-  extractContractInfo,
-  extractRead,
-  getContractId,
-} from '@coinweb/contract-kit';
-
-export const mutexUnlock = (context: Context) => {
-  const { providedCweb } = extractContractInfo(context.tx);
-  const issuer = constructContractIssuer(getContractId(context.tx));
-  return [
-    constructContinueTx(
-      context,
-      [],
-      [
-        {
-          callInfo: {
-            ref: constructContractRef(issuer, []),
-            methodInfo: {
-              methodName: '_unlock_exec',
-              methodArgs: [],
-            },
-            contractInfo: {
-              providedCweb: (providedCweb ? providedCweb - 1000n : 1000n) / 2n,
-              authenticated: null,
-            },
-            contractArgs: [constructRangeRead(issuer, 'mutex', {}, 10000)],
-          },
-        },
-        {
-          callInfo: {
-            ref: constructContractRef(issuer, []),
-            methodInfo: {
-              methodName: '_unlock',
-              methodArgs: [],
-            },
-            contractInfo: {
-              providedCweb: (providedCweb ? providedCweb - 1000n : 1000n) / 2n,
-              authenticated: null,
-            },
-            contractArgs: [],
-          },
-        },
-      ]
-    ),
-  ];
-};
-
-export const mutexUnlockExec = (context: Context) => {
-  const claim = extractContractArgs(context.tx)[0]!;
-  const take = extractRead(claim)![0];
-  return [constructContinueTx(context, [constructTake(take.content.key)])];
-};
diff --git a/packages/cwait/src/onchain/constructCwebMain.ts b/packages/cwait/src/onchain/constructCwebMain.ts
new file mode 100644
index 0000000..88e208b
--- /dev/null
+++ b/packages/cwait/src/onchain/constructCwebMain.ts
@@ -0,0 +1,27 @@
+import { ContractHandlers as ContractHandlersOrig, SELF_REGISTER_HANDLER_NAME } from '@coinweb/contract-kit';
+import { selfRegisterHandler } from '@coinweb/self-register';
+import { queue } from 'lib/onchain';
+
+import { addMethodHandler, ContractHandlers, executeHandler } from '../contract-kit';
+
+import { executor } from './executor';
+import { mutexMethods } from './mutex';
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const constructCwebMain = (methods: Record<string, (...args: any[]) => Promise<void>>) => async () => {
+  const module: ContractHandlers = { handlers: {} };
+
+  Object.entries(methods).forEach(([name, handler]) => {
+    addMethodHandler(module, name, executor(handler));
+  });
+
+  Object.entries(mutexMethods).forEach(([name, handler]) => {
+    addMethodHandler(module, name, handler);
+  });
+
+  addMethodHandler(module, SELF_REGISTER_HANDLER_NAME, selfRegisterHandler);
+
+  queue.applyQueue(module as ContractHandlersOrig, []);
+
+  await executeHandler(module);
+};
diff --git a/packages/cwait/src/onchain/executor.ts b/packages/cwait/src/onchain/executor.ts
index f917eee..9532673 100644
--- a/packages/cwait/src/onchain/executor.ts
+++ b/packages/cwait/src/onchain/executor.ts
@@ -43,7 +43,7 @@ export const executor = (method: (...args: any[]) => Promise<void>) => {
       const isFullyExecuted = await execution;
       return constructTx(isFullyExecuted);
     } catch (error) {
-      console.log('<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< executor-error');
+      console.log('<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< executor-error');
       console.log((error as Error).message);
       throw error;
     }
diff --git a/packages/cwait/src/onchain/mutex/calls/constructGetAccessCall.ts b/packages/cwait/src/onchain/mutex/calls/constructGetAccessCall.ts
new file mode 100644
index 0000000..88eec8b
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/calls/constructGetAccessCall.ts
@@ -0,0 +1,26 @@
+import { ContractIssuer, constructContractRef } from '@coinweb/contract-kit';
+
+import { constructMutexLockClaimRangeRead } from '../claims';
+import { getAccessMethodName } from '../methods';
+import { MutexGetAccessArgs } from '../types';
+
+export const constructGetAccessCall = (
+  issuer: ContractIssuer,
+  ...[claimKey, processId, uniqueId]: MutexGetAccessArgs
+) => {
+  return {
+    callInfo: {
+      ref: constructContractRef(issuer, []),
+      methodInfo: {
+        methodName: getAccessMethodName,
+        methodArgs: [claimKey, processId, uniqueId] satisfies MutexGetAccessArgs,
+      },
+      contractInfo: {
+        providedCweb: 800n,
+        authenticated: null,
+      },
+      contractArgs: [constructMutexLockClaimRangeRead(issuer)],
+    },
+    fee: 900n,
+  };
+};
diff --git a/packages/cwait/src/onchain/mutex/calls/constructLockCall.ts b/packages/cwait/src/onchain/mutex/calls/constructLockCall.ts
new file mode 100644
index 0000000..4c2a69a
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/calls/constructLockCall.ts
@@ -0,0 +1,24 @@
+import { ContractIssuer, constructContractRef } from '@coinweb/contract-kit';
+
+import { constructMutexBlockAccessClaimTake, constructMutexLockBlock } from '../claims';
+import { lockMethodName } from '../methods';
+import { lockFee } from '../settings';
+
+export const constructLockCall = (issuer: ContractIssuer, lockId: string) => {
+  return {
+    callInfo: {
+      ref: constructContractRef(issuer, []),
+      methodInfo: {
+        methodName: lockMethodName,
+        methodArgs: [],
+      },
+      contractInfo: {
+        providedCweb: lockFee,
+        authenticated: null,
+      },
+      contractArgs: [],
+    },
+    ops: [constructMutexLockBlock(lockId, issuer), constructMutexBlockAccessClaimTake(lockId)],
+    fee: lockFee + 200n,
+  };
+};
diff --git a/packages/cwait/src/onchain/mutex/calls/constructTryOpCall.ts b/packages/cwait/src/onchain/mutex/calls/constructTryOpCall.ts
new file mode 100644
index 0000000..04d6078
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/calls/constructTryOpCall.ts
@@ -0,0 +1,23 @@
+import { constructContractRef, ContractIssuer } from '@coinweb/contract-kit';
+
+import { constructMutexLockClaimRangeRead } from '../claims';
+import { tryOpMethodName } from '../methods';
+import { MutexTryOpArgs } from '../types';
+
+export const constructTryOpCall = (issuer: ContractIssuer, ...[op, processId]: MutexTryOpArgs) => {
+  return {
+    callInfo: {
+      ref: constructContractRef(issuer, []),
+      methodInfo: {
+        methodName: tryOpMethodName,
+        methodArgs: [op, processId] satisfies MutexTryOpArgs,
+      },
+      contractInfo: {
+        providedCweb: 800n,
+        authenticated: null,
+      },
+      contractArgs: [constructMutexLockClaimRangeRead(issuer)],
+    },
+    fee: 900n,
+  };
+};
diff --git a/packages/cwait/src/onchain/mutex/calls/constructUnlockCall.ts b/packages/cwait/src/onchain/mutex/calls/constructUnlockCall.ts
new file mode 100644
index 0000000..4ce421d
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/calls/constructUnlockCall.ts
@@ -0,0 +1,24 @@
+import { constructContractRef, ContractIssuer } from '@coinweb/contract-kit';
+
+import { constructMutexBlockUnlockClaimTake, constructMutexUnlockBlock } from '../claims';
+import { unlockMethodName } from '../methods';
+import { MutexUnlockArgs } from '../types';
+
+export const constructUnlockCall = (issuer: ContractIssuer, ...[lockId, timestamp, notify]: MutexUnlockArgs) => {
+  return {
+    callInfo: {
+      ref: constructContractRef(issuer, []),
+      methodInfo: {
+        methodName: unlockMethodName,
+        methodArgs: [lockId, timestamp] satisfies MutexUnlockArgs,
+      },
+      contractInfo: {
+        providedCweb: 1000n,
+        authenticated: null,
+      },
+      contractArgs: [],
+    },
+    ops: notify ? [constructMutexUnlockBlock(lockId, issuer), constructMutexBlockUnlockClaimTake(lockId)] : [],
+    fee: 1200n,
+  };
+};
diff --git a/packages/cwait/src/onchain/mutex/calls/index.ts b/packages/cwait/src/onchain/mutex/calls/index.ts
new file mode 100644
index 0000000..357971b
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/calls/index.ts
@@ -0,0 +1,4 @@
+export * from './constructGetAccessCall';
+export * from './constructLockCall';
+export * from './constructTryOpCall';
+export * from './constructUnlockCall';
diff --git a/packages/cwait/src/onchain/mutex/claims/access.ts b/packages/cwait/src/onchain/mutex/claims/access.ts
deleted file mode 100644
index 3c1c9ae..0000000
--- a/packages/cwait/src/onchain/mutex/claims/access.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-import {
-  constructClaim,
-  constructClaimKey,
-  constructStore,
-  constructTake,
-  CwebStore,
-  GStore,
-} from '@coinweb/contract-kit';
-
-import { MutexAccessResult, MutexAccessStatus } from '../types';
-
-export const mutexAccessKey = 'mutex_access';
-
-export const constructMutexAccessFirstPart = () => [mutexAccessKey];
-
-export const constructMutexAccessClaimKey = (uniqueId: string) =>
-  constructClaimKey(constructMutexAccessFirstPart(), [uniqueId]);
-
-export const constructMutexAccessClaim = (uniqueId: string, status: MutexAccessStatus) =>
-  constructClaim(constructMutexAccessClaimKey(uniqueId), { status } satisfies MutexAccessResult, '0x0');
-
-export const constructMutexAccessClaimStore = (uniqueId: string, status: MutexAccessStatus): GStore<CwebStore> =>
-  constructStore(constructMutexAccessClaim(uniqueId, status));
-
-export const constructMutexAccessClaimTake = (uniqueId: string) =>
-  constructTake(constructMutexAccessClaimKey(uniqueId));
diff --git a/packages/cwait/src/onchain/mutex/claims/index.ts b/packages/cwait/src/onchain/mutex/claims/index.ts
index ffb10d3..c1f0350 100644
--- a/packages/cwait/src/onchain/mutex/claims/index.ts
+++ b/packages/cwait/src/onchain/mutex/claims/index.ts
@@ -1,2 +1,4 @@
-export * from './access';
-export * from './lock';
+export * from './mutexBlockAccess';
+export * from './mutexBlockLock';
+export * from './mutexBlockUnlock';
+export * from './mutexLock';
diff --git a/packages/cwait/src/onchain/mutex/claims/mutexBlockAccess.ts b/packages/cwait/src/onchain/mutex/claims/mutexBlockAccess.ts
new file mode 100644
index 0000000..8c02e2e
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/claims/mutexBlockAccess.ts
@@ -0,0 +1,41 @@
+import {
+  BlockFilter,
+  constructBlock,
+  constructClaim,
+  constructClaimKey,
+  constructStore,
+  constructTake,
+  ContractIssuer,
+  CwebStore,
+  GStore,
+} from '@coinweb/contract-kit';
+
+import { MutexAccessResult, MutexAccessStatus } from '../types';
+
+export const mutexBlockAccessKey = 'mutex_block_access';
+
+export const constructMutexBlockAccessClaimKey = (uniqueId: string) =>
+  constructClaimKey([mutexBlockAccessKey], [uniqueId]);
+
+export const constructMutexBlockAccessClaim = (uniqueId: string, status: MutexAccessStatus) =>
+  constructClaim(constructMutexBlockAccessClaimKey(uniqueId), { status } satisfies MutexAccessResult, '0x0');
+
+export const constructMutexBlockAccessClaimStore = (uniqueId: string, status: MutexAccessStatus): GStore<CwebStore> =>
+  constructStore(constructMutexBlockAccessClaim(uniqueId, status));
+
+export const constructMutexBlockAccessClaimTake = (uniqueId: string) =>
+  constructTake(constructMutexBlockAccessClaimKey(uniqueId));
+
+export const constructMutexBlockAccessBlockFilter = (lockId: string, issuer: ContractIssuer): BlockFilter => {
+  const { first_part: first, second_part: second } = constructMutexBlockAccessClaimKey(lockId);
+
+  return {
+    issuer,
+    first,
+    second,
+  };
+};
+
+export const constructMutexAccessBlock = (lockId: string, issuer: ContractIssuer) => {
+  return constructBlock([constructMutexBlockAccessBlockFilter(lockId, issuer)]);
+};
diff --git a/packages/cwait/src/onchain/mutex/claims/mutexBlockLock.ts b/packages/cwait/src/onchain/mutex/claims/mutexBlockLock.ts
new file mode 100644
index 0000000..5985ead
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/claims/mutexBlockLock.ts
@@ -0,0 +1,36 @@
+import {
+  BlockFilter,
+  constructBlock,
+  constructClaim,
+  constructClaimKey,
+  constructStore,
+  constructTake,
+  ContractIssuer,
+} from '@coinweb/contract-kit';
+
+export const mutexBlockLockKey = 'mutex_block_lock';
+
+export const constructMutexBlockLockClaimKey = (lockId: string) => constructClaimKey([mutexBlockLockKey], [lockId]);
+
+export const constructMutexBlockLockClaim = ({ lockId }: { lockId: string }) =>
+  constructClaim(constructMutexBlockLockClaimKey(lockId), {}, '0x0');
+
+export const constructMutexBlockLockClaimStore = ({ lockId }: { lockId: string }) =>
+  constructStore(constructMutexBlockLockClaim({ lockId }));
+
+export const constructMutexBlockLockClaimTake = (lockId: string) =>
+  constructTake(constructMutexBlockLockClaimKey(lockId));
+
+export const constructMutexLockBlockFilter = (lockId: string, issuer: ContractIssuer): BlockFilter => {
+  const { first_part: first, second_part: second } = constructMutexBlockLockClaimKey(lockId);
+
+  return {
+    issuer,
+    first,
+    second,
+  };
+};
+
+export const constructMutexLockBlock = (lockId: string, issuer: ContractIssuer) => {
+  return constructBlock([constructMutexLockBlockFilter(lockId, issuer)]);
+};
diff --git a/packages/cwait/src/onchain/mutex/claims/mutexBlockUnlock.ts b/packages/cwait/src/onchain/mutex/claims/mutexBlockUnlock.ts
new file mode 100644
index 0000000..6f7f7fd
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/claims/mutexBlockUnlock.ts
@@ -0,0 +1,39 @@
+import {
+  BlockFilter,
+  constructBlock,
+  constructClaim,
+  constructClaimKey,
+  constructStore,
+  constructTake,
+  ContractIssuer,
+  CwebStore,
+  GStore,
+} from '@coinweb/contract-kit';
+
+export const mutexBlockUnlockKey = 'mutex_block_unlock';
+
+export const constructMutexBlockUnlockClaimKey = (uniqueId: string) =>
+  constructClaimKey([mutexBlockUnlockKey], [uniqueId]);
+
+export const constructMutexBlockUnlockClaim = (uniqueId: string) =>
+  constructClaim(constructMutexBlockUnlockClaimKey(uniqueId), {}, '0x0');
+
+export const constructMutexBlockUnlockClaimStore = (uniqueId: string): GStore<CwebStore> =>
+  constructStore(constructMutexBlockUnlockClaim(uniqueId));
+
+export const constructMutexBlockUnlockClaimTake = (uniqueId: string) =>
+  constructTake(constructMutexBlockUnlockClaimKey(uniqueId));
+
+export const constructMutexUnlockBlockFilter = (lockId: string, issuer: ContractIssuer): BlockFilter => {
+  const { first_part: first, second_part: second } = constructMutexBlockUnlockClaimKey(lockId);
+
+  return {
+    issuer,
+    first,
+    second,
+  };
+};
+
+export const constructMutexUnlockBlock = (lockId: string, issuer: ContractIssuer) => {
+  return constructBlock([constructMutexUnlockBlockFilter(lockId, issuer)]);
+};
diff --git a/packages/cwait/src/onchain/mutex/claims/lock.ts b/packages/cwait/src/onchain/mutex/claims/mutexLock.ts
similarity index 83%
rename from packages/cwait/src/onchain/mutex/claims/lock.ts
rename to packages/cwait/src/onchain/mutex/claims/mutexLock.ts
index c307665..725d80d 100644
--- a/packages/cwait/src/onchain/mutex/claims/lock.ts
+++ b/packages/cwait/src/onchain/mutex/claims/mutexLock.ts
@@ -1,11 +1,9 @@
 import {
   constructClaim,
   constructClaimKey,
-  constructContractIssuer,
   constructRangeRead,
   constructStore,
-  Context,
-  getContractId,
+  ContractIssuer,
   GRead,
 } from '@coinweb/contract-kit';
 import { CwebRead } from '@coinweb/contract-kit/dist/esm/operations/read';
@@ -58,13 +56,8 @@ export const constructMutexLockClaimStore = ({
   processId: string;
 }) => constructStore(constructMutexLockClaim({ fee, keys, locked, lockId, timestamp, processId }));
 
-export const constructMutexLockClaimRangeRead = (context: Context): GRead<CwebRead> =>
-  constructRangeRead(
-    constructContractIssuer(getContractId(context.tx)),
-    constructMutexLockFirstPart(),
-    {},
-    rangeReadLimit
-  );
+export const constructMutexLockClaimRangeRead = (issuer: ContractIssuer): GRead<CwebRead> =>
+  constructRangeRead(issuer, constructMutexLockFirstPart(), {}, rangeReadLimit);
 
 // export const constructMutexLockClaimTake = (lockId: string, timestamp: number) =>
 //   constructTake(constructMutexLockClaimKey(lockId, timestamp));
diff --git a/packages/cwait/src/onchain/mutex/methods/execLock.ts b/packages/cwait/src/onchain/mutex/methods/execLock.ts
index 0284cf8..3f79a2f 100644
--- a/packages/cwait/src/onchain/mutex/methods/execLock.ts
+++ b/packages/cwait/src/onchain/mutex/methods/execLock.ts
@@ -16,7 +16,7 @@ import { lockFee } from '../settings';
 import { MutexLockState } from '../types';
 import { isMatchLockKeys } from '../utils';
 
-import { lockMethodName } from './names';
+import { lockMethodName, notifyLockMethodName } from './names';
 
 export const mutexExecLock = (context: Context) => {
   const { availableCweb } = getCallParameters(context);
@@ -69,6 +69,20 @@ export const mutexExecLock = (context: Context) => {
             contractArgs: [],
           },
         },
+        {
+          callInfo: {
+            ref: constructContractRef(issuer, []),
+            methodInfo: {
+              methodName: notifyLockMethodName,
+              methodArgs: [(lockCandidate.key.second_part as [number, string])[1]],
+            },
+            contractInfo: {
+              providedCweb: 200n,
+              authenticated: null,
+            },
+            contractArgs: [],
+          },
+        },
       ]
     ),
   ];
diff --git a/packages/cwait/src/onchain/mutex/methods/getAccess.ts b/packages/cwait/src/onchain/mutex/methods/getAccess.ts
index 28d2bdd..a3365ad 100644
--- a/packages/cwait/src/onchain/mutex/methods/getAccess.ts
+++ b/packages/cwait/src/onchain/mutex/methods/getAccess.ts
@@ -2,7 +2,7 @@ import { constructContinueTx, Context, extractContractArgs, extractRead } from '
 import { getContractArguments } from 'lib/onchain';
 import { TypedClaim } from 'lib/shared';
 
-import { constructMutexAccessClaimStore } from '../claims';
+import { constructMutexBlockAccessClaimStore } from '../claims';
 import { MutexAccessStatus, MutexGetAccessArgs, MutexLockState } from '../types';
 import { isMatchLockKeys } from '../utils';
 
@@ -23,7 +23,7 @@ export const mutexGetAccess = (context: Context) => {
 
   return [
     constructContinueTx(context, [
-      constructMutexAccessClaimStore(
+      constructMutexBlockAccessClaimStore(
         uniqueId,
         isLockedByOtherProcess ? MutexAccessStatus.DENIED : MutexAccessStatus.GRANTED
       ),
diff --git a/packages/cwait/src/onchain/mutex/methods/index.ts b/packages/cwait/src/onchain/mutex/methods/index.ts
index 287d9f5..78f9c05 100644
--- a/packages/cwait/src/onchain/mutex/methods/index.ts
+++ b/packages/cwait/src/onchain/mutex/methods/index.ts
@@ -2,4 +2,6 @@ export * from './execLock';
 export * from './getAccess';
 export * from './lock';
 export * from './names';
+export * from './notifyLock';
+export * from './tryOp';
 export * from './unlock';
diff --git a/packages/cwait/src/onchain/mutex/methods/lock.ts b/packages/cwait/src/onchain/mutex/methods/lock.ts
index 0a31048..fb02ef1 100644
--- a/packages/cwait/src/onchain/mutex/methods/lock.ts
+++ b/packages/cwait/src/onchain/mutex/methods/lock.ts
@@ -25,7 +25,7 @@ export const mutexLock = (context: Context) => {
               providedCweb: availableCweb - 700n,
               authenticated: null,
             },
-            contractArgs: [constructMutexLockClaimRangeRead(context)],
+            contractArgs: [constructMutexLockClaimRangeRead(issuer)],
           },
         },
       ]
diff --git a/packages/cwait/src/onchain/mutex/methods/names.ts b/packages/cwait/src/onchain/mutex/methods/names.ts
index 269ca95..b430203 100644
--- a/packages/cwait/src/onchain/mutex/methods/names.ts
+++ b/packages/cwait/src/onchain/mutex/methods/names.ts
@@ -2,3 +2,5 @@ export const lockMethodName = '_mutex_lock';
 export const execLockMethodName = '_mutex_execLock';
 export const getAccessMethodName = '_mutex_get_access';
 export const unlockMethodName = '_mutex_unlock';
+export const tryOpMethodName = '_mutex_try_op';
+export const notifyLockMethodName = '_mutex_notify_lock';
diff --git a/packages/cwait/src/onchain/mutex/methods/notifyLock.ts b/packages/cwait/src/onchain/mutex/methods/notifyLock.ts
new file mode 100644
index 0000000..3d5e838
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/methods/notifyLock.ts
@@ -0,0 +1,11 @@
+import { constructContinueTx, Context } from '@coinweb/contract-kit';
+import { getContractArguments } from 'lib/onchain';
+
+import { constructMutexBlockLockClaimStore } from '../claims/mutexBlockLock';
+import { MutexNotifyLockArgs } from '../types';
+
+export const notifyLock = (context: Context) => {
+  const [lockId] = getContractArguments<MutexNotifyLockArgs>(context);
+
+  return [constructContinueTx(context, [constructMutexBlockLockClaimStore({ lockId })])];
+};
diff --git a/packages/cwait/src/onchain/mutex/methods/tryOp.ts b/packages/cwait/src/onchain/mutex/methods/tryOp.ts
new file mode 100644
index 0000000..ce986d2
--- /dev/null
+++ b/packages/cwait/src/onchain/mutex/methods/tryOp.ts
@@ -0,0 +1,30 @@
+import { constructContinueTx, Context, extractContractArgs, extractRead } from '@coinweb/contract-kit';
+import { getContractArguments } from 'lib/onchain';
+import { TypedClaim } from 'lib/shared';
+
+import { MutexLockState, MutexTryOpArgs } from '../types';
+import { isMatchLockKeys } from '../utils';
+
+export const tryOp = (context: Context) => {
+  const [op, processId] = getContractArguments<MutexTryOpArgs>(context);
+
+  const claimKey = 'StoreOp' in op ? op.StoreOp.key : op.TakeOp.key;
+
+  const lockQueue = extractRead(extractContractArgs(context.tx)[0])?.map(
+    ({ content }) => content as TypedClaim<MutexLockState>
+  );
+
+  if (!lockQueue) {
+    throw new Error('No lock queue found');
+  }
+
+  const isLockedByOtherProcess = lockQueue.some(
+    ({ body }) => body.locked && body.processId !== processId && body.keys.some((key) => isMatchLockKeys(key, claimKey))
+  );
+
+  if (isLockedByOtherProcess) {
+    return [];
+  }
+
+  return [constructContinueTx(context, [op])];
+};
diff --git a/packages/cwait/src/onchain/mutex/types.ts b/packages/cwait/src/onchain/mutex/types.ts
index 2aec5c9..9a54e83 100644
--- a/packages/cwait/src/onchain/mutex/types.ts
+++ b/packages/cwait/src/onchain/mutex/types.ts
@@ -1,4 +1,4 @@
-import { ClaimKey } from '@coinweb/contract-kit';
+import { Claim, ClaimKey, GStore, GTake } from '@coinweb/contract-kit';
 
 export type LockedKey = Omit<ClaimKey, 'second_part'> & Partial<Pick<ClaimKey, 'second_part'>>;
 
@@ -19,4 +19,8 @@ export type MutexAccessResult = {
 
 export type MutexGetAccessArgs = [claimKey: ClaimKey, processId: string, uniqueId: string];
 
-export type MutexUnlockArgs = [lockId: string, timestamp: number];
+export type MutexUnlockArgs = [lockId: string, timestamp: number, notify?: boolean];
+
+export type MutexTryOpArgs = [op: GTake<Claim> | GStore<Claim>, processId: string];
+
+export type MutexNotifyLockArgs = [lockId: string];
diff --git a/packages/cwait/src/onchain/promisifiedOps/ops/block.ts b/packages/cwait/src/onchain/promisifiedOps/ops/block.ts
index f85fce9..56d1086 100644
--- a/packages/cwait/src/onchain/promisifiedOps/ops/block.ts
+++ b/packages/cwait/src/onchain/promisifiedOps/ops/block.ts
@@ -27,7 +27,7 @@ export const blockOp = (filters: BlockFilter[]) => {
           throw new Error('Block operation not found');
         }
 
-        const result = op && extractBlock(op);
+        const result = extractBlock(op);
 
         resolve(result);
       }
diff --git a/packages/cwait/src/onchain/promisifiedOps/ops/lock.ts b/packages/cwait/src/onchain/promisifiedOps/ops/lock.ts
new file mode 100644
index 0000000..7bb3fd6
--- /dev/null
+++ b/packages/cwait/src/onchain/promisifiedOps/ops/lock.ts
@@ -0,0 +1,42 @@
+import { ResolvedLockOp } from '../../../types';
+import { opMarker } from '../../global';
+import { LockedKey } from '../../mutex';
+import { isResolvedLockOp, isResolvedSlotOp, uuid } from '../../utils';
+import { pushAwaitedTask } from '../awaited';
+import { shiftResolvedOp } from '../resolved';
+
+export const lockOp = (keys: LockedKey[] | LockedKey) => {
+  console.log('lockOp');
+  let opMarkerValue = false;
+
+  const result = new Promise<ResolvedLockOp['LockOp']>((resolve, reject) => {
+    try {
+      const { op, isOp } = shiftResolvedOp();
+
+      if (!isOp) {
+        pushAwaitedTask({ LockOp: { lockId: uuid(), keys: Array.isArray(keys) ? keys : [keys] } });
+        opMarkerValue = true;
+      } else {
+        if (isResolvedSlotOp(op)) {
+          console.log('storeOp-slotOp');
+          return;
+        }
+
+        if (!isResolvedLockOp(op)) {
+          console.log('lockOp-error');
+          throw new Error('Lock operation not found');
+        }
+
+        const result = op.LockOp;
+
+        resolve(result);
+      }
+    } catch (error) {
+      reject(error);
+    }
+  });
+
+  (result as Promise<ResolvedLockOp['LockOp']> & { [opMarker]: boolean })[opMarker] = opMarkerValue;
+
+  return result;
+};
diff --git a/packages/cwait/src/onchain/promisifiedOps/ops/rangeRead.ts b/packages/cwait/src/onchain/promisifiedOps/ops/rangeRead.ts
index 7b223f6..57137ab 100644
--- a/packages/cwait/src/onchain/promisifiedOps/ops/rangeRead.ts
+++ b/packages/cwait/src/onchain/promisifiedOps/ops/rangeRead.ts
@@ -34,7 +34,7 @@ export const rangeReadOp = <TClaims extends Claim[] = TypedClaim[]>(
           throw new Error('Read operation not found');
         }
 
-        const claim = op && ((extractRead(op)?.map((result) => result.content) ?? null) as TClaims | null);
+        const claim = (extractRead(op)?.map((result) => result.content) ?? null) as TClaims | null;
         resolve(claim);
       }
     } catch (error) {
diff --git a/packages/cwait/src/onchain/promisifiedOps/ops/read.ts b/packages/cwait/src/onchain/promisifiedOps/ops/read.ts
index 0e58301..72f0320 100644
--- a/packages/cwait/src/onchain/promisifiedOps/ops/read.ts
+++ b/packages/cwait/src/onchain/promisifiedOps/ops/read.ts
@@ -29,7 +29,7 @@ export const readOp = <TClaim extends Claim = TypedClaim>(key: ClaimKey) => {
           throw new Error('Read operation not found');
         }
 
-        const claim = op && ((extractRead(op)?.[0]?.content ?? null) as TClaim | null);
+        const claim = (extractRead(op)?.[0]?.content ?? null) as TClaim | null;
         resolve(claim);
       }
     } catch (error) {
diff --git a/packages/cwait/src/onchain/promisifiedOps/ops/store.ts b/packages/cwait/src/onchain/promisifiedOps/ops/store.ts
index 15a5254..57b35d7 100644
--- a/packages/cwait/src/onchain/promisifiedOps/ops/store.ts
+++ b/packages/cwait/src/onchain/promisifiedOps/ops/store.ts
@@ -28,7 +28,7 @@ export const storeOp = (claim: Claim) => {
           throw new Error('Store operation not found');
         }
 
-        const result = op && extractStore(op);
+        const result = extractStore(op);
 
         resolve(result);
       }
diff --git a/packages/cwait/src/onchain/promisifiedOps/ops/take.ts b/packages/cwait/src/onchain/promisifiedOps/ops/take.ts
index 20041bd..2f4dcdd 100644
--- a/packages/cwait/src/onchain/promisifiedOps/ops/take.ts
+++ b/packages/cwait/src/onchain/promisifiedOps/ops/take.ts
@@ -28,7 +28,7 @@ export const takeOp = <TClaim extends Claim = TypedClaim>(key: ClaimKey) => {
           throw new Error('Take operation not found');
         }
 
-        const claim = op && extractTake(op);
+        const claim = extractTake(op);
         resolve(claim as TClaim | null);
       }
     } catch (error) {
diff --git a/packages/cwait/src/onchain/promisifiedOps/ops/unlock.ts b/packages/cwait/src/onchain/promisifiedOps/ops/unlock.ts
new file mode 100644
index 0000000..404792a
--- /dev/null
+++ b/packages/cwait/src/onchain/promisifiedOps/ops/unlock.ts
@@ -0,0 +1,38 @@
+import { opMarker } from '../../global';
+import { isResolvedSlotOp, isResolvedUnlockOp } from '../../utils';
+import { pushAwaitedTask } from '../awaited';
+import { shiftResolvedOp } from '../resolved';
+
+export const unlock = (lockId: string) => {
+  console.log('lockOp');
+  let opMarkerValue = false;
+
+  const result = new Promise<void>((resolve, reject) => {
+    try {
+      const { op, isOp } = shiftResolvedOp();
+
+      if (!isOp) {
+        pushAwaitedTask({ UnlockOp: { lockId } });
+        opMarkerValue = true;
+      } else {
+        if (isResolvedSlotOp(op)) {
+          console.log('unlockOp-slotOp');
+          return;
+        }
+
+        if (!isResolvedUnlockOp(op)) {
+          console.log('unlockOp-error');
+          throw new Error('Unlock operation not found');
+        }
+
+        resolve();
+      }
+    } catch (error) {
+      reject(error);
+    }
+  });
+
+  (result as Promise<void> & { [opMarker]: boolean })[opMarker] = opMarkerValue;
+
+  return result;
+};
diff --git a/packages/cwait/src/onchain/promisifiedTxs/index.ts b/packages/cwait/src/onchain/promisifiedTxs/index.ts
deleted file mode 100644
index 6b03561..0000000
--- a/packages/cwait/src/onchain/promisifiedTxs/index.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-export * from './jumpTx';
-export * from './tx';
diff --git a/packages/cwait/src/onchain/promisifiedTxs/jumpTx.ts b/packages/cwait/src/onchain/promisifiedTxs/jumpTx.ts
deleted file mode 100644
index 6ef6f86..0000000
--- a/packages/cwait/src/onchain/promisifiedTxs/jumpTx.ts
+++ /dev/null
@@ -1 +0,0 @@
-export const jumpTx = () => null;
diff --git a/packages/cwait/src/onchain/promisifiedTxs/tx.ts b/packages/cwait/src/onchain/promisifiedTxs/tx.ts
deleted file mode 100644
index 62a9327..0000000
--- a/packages/cwait/src/onchain/promisifiedTxs/tx.ts
+++ /dev/null
@@ -1 +0,0 @@
-export const tx = () => null;
diff --git a/packages/cwait/src/onchain/utils/typeGuards.ts b/packages/cwait/src/onchain/utils/typeGuards.ts
index 6a5bfa3..ff95a00 100644
--- a/packages/cwait/src/onchain/utils/typeGuards.ts
+++ b/packages/cwait/src/onchain/utils/typeGuards.ts
@@ -13,7 +13,16 @@ import { CwebCallRefResolved, isResolvedCall } from '@coinweb/contract-kit/dist/
 import { ResolvedBlock } from '@coinweb/contract-kit/dist/types/operations/block';
 import { GBlock, GCall, GRead, GStore, GTake } from '@coinweb/contract-kit/dist/types/operations/generics';
 
-import { PreparedExecOp, PreparedOp, ResolvedChildOp, ResolvedExecOp, ResolvedOp, ResolvedSlotOp } from '../../types';
+import {
+  PreparedExecOp,
+  PreparedOp,
+  ResolvedChildOp,
+  ResolvedExecOp,
+  ResolvedLockOp,
+  ResolvedOp,
+  ResolvedSlotOp,
+  ResolvedUnlockOp,
+} from '../../types';
 
 export const isResolvedSlotOp = (op?: ResolvedOp | null): op is ResolvedSlotOp => {
   if (op && 'SlotOp' in op) {
@@ -39,6 +48,22 @@ export const isResolvedChildOp = (op?: ResolvedOp | null): op is ResolvedChildOp
   return !!(op && 'ChildOp' in op);
 };
 
+export const isResolvedLockOp = (op?: ResolvedOp | null): op is ResolvedLockOp => {
+  if (op && 'LockOp' in op) {
+    console.log('isResolvedLockOp >>> ', JSON.stringify(op));
+  }
+
+  return !!(op && 'LockOp' in op);
+};
+
+export const isResolvedUnlockOp = (op?: ResolvedOp | null): op is ResolvedUnlockOp => {
+  if (op && 'UnlockOp' in op) {
+    console.log('isResolvedUnlockOp >>> ', JSON.stringify(op));
+  }
+
+  return !!(op && 'UnlockOp' in op);
+};
+
 export const isResolvedBlockOp = (op?: ResolvedOp | null): op is GBlock<ResolvedBlock> => {
   if (op && 'BlockOp' in op) {
     console.log('isResolvedBlockOp >>> ', JSON.stringify(op));
diff --git a/packages/cwait/src/types.ts b/packages/cwait/src/types.ts
index a5b7fb3..c0601b9 100644
--- a/packages/cwait/src/types.ts
+++ b/packages/cwait/src/types.ts
@@ -1,5 +1,7 @@
 import { Claim, ClaimKey, OrdJson, PreparedOperation, ResolvedOperation, User } from '@coinweb/contract-kit';
 
+import { LockedKey } from './onchain/mutex';
+
 export type HexBigInt = `0x${string}`;
 
 export type TypedClaim<TBody extends OrdJson = OrdJson, TKey extends ClaimKey = ClaimKey> = Claim & {
@@ -22,7 +24,23 @@ export type ResolvedChildOp = {
   ChildOp: 0;
 };
 
-export type ResolvedOp = ResolvedOperation | ResolvedSlotOp | ResolvedExecOp | ResolvedChildOp;
+export type ResolvedLockOp = {
+  LockOp: {
+    lockId: string;
+  };
+};
+
+export type ResolvedUnlockOp = {
+  UnlockOp: 0;
+};
+
+export type ResolvedOp =
+  | ResolvedOperation
+  | ResolvedSlotOp
+  | ResolvedExecOp
+  | ResolvedChildOp
+  | ResolvedLockOp
+  | ResolvedUnlockOp;
 
 export type PreparedExecOp = {
   ExecOp: {
@@ -30,7 +48,20 @@ export type PreparedExecOp = {
   };
 };
 
-export type PreparedOp = PreparedOperation | PreparedExecOp;
+export type PreparedLockOp = {
+  LockOp: {
+    lockId: string;
+    keys: LockedKey[];
+  };
+};
+
+export type PreparedUnlockOp = {
+  UnlockOp: {
+    lockId: string;
+  };
+};
+
+export type PreparedOp = PreparedOperation | PreparedExecOp | PreparedLockOp | PreparedUnlockOp;
 
 export type Task = {
   op: PreparedOp;