diff --git a/samples/sample.evm b/samples/sample.evm
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diff --git a/samples/sample.evmhex b/samples/sample.evmhex
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+0x60606040526000357c010000000000000000000000000000000000000000000000000000000090048063771602F7146037576035565b005b60546004808035906020019091908035906020019091905050606A565b6040518082815260200191505060405180910390f35b6000818301905080505b9291505056
diff --git a/samples/sample.wasm b/samples/sample.wasm
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diff --git a/samples/sample.wast b/samples/sample.wast
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+
+(module
+  (import "ethereum" "useGas" (func $useGas (param i64)))
+  (global $cb_dest (mut i32) (i32.const 0))
+  (global $sp (mut i32) (i32.const -32))
+  (global $init (mut i32) (i32.const 0))
+
+  ;; memory related global
+  (global $memstart i32  (i32.const 33832))
+  ;; the number of 256 words stored in memory
+  (global $wordCount (mut i64) (i64.const 0))
+  ;; what was charged for the last memory allocation
+  (global $prevMemCost (mut i64) (i64.const 0))
+
+  ;; TODO: memory should only be 1, but can't resize right now
+  (memory 500)
+  (export "memory" (memory 0))
+
+  
+
+  
+  (func $main
+    (export "main")
+    (local $jump_dest i32)
+    (set_local $jump_dest (i32.const -1))
+
+    (block $done
+      (loop $loop
+        
+  (block $0 
+    (if
+      (i32.eqz (get_global $init))
+      (then
+        (set_global $init (i32.const 1))
+        (br $0))
+      (else
+        ;; the callback dest can never be in the first block
+        (if (i32.eq (get_global $cb_dest) (i32.const 0)) 
+          (then
+            (unreachable)
+          )
+          (else 
+            ;; return callback destination and zero out $cb_dest 
+            get_global $cb_dest
+            (set_global $cb_dest (i32.const 0))
+            (br_table $0 )
+          )))))(call $useGas (i64.const 0)) )))
+)
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