diff --git a/components/sidebar/context/strategy/SidebarStrategy.vue b/components/sidebar/context/strategy/SidebarStrategy.vue
index d8d474c..39a4b88 100644
--- a/components/sidebar/context/strategy/SidebarStrategy.vue
+++ b/components/sidebar/context/strategy/SidebarStrategy.vue
@@ -5,17 +5,19 @@
     <div class="h-full overflow-y-scroll scrollbar-hover">
       <div class="mx-auto" style="max-width: 296px">
         <div class="py-2 sm:py-4">
-          <pre>{{ $props }}</pre>
-          <pre>{{ selectedStrategy }}</pre>
+          <div v-for="(input, index) in inputs" :key="index">
+            <input
+              type="text"
+              :value="input.value"
+              @input="$event => input.onInput($event.target.value)"
+              :placeholder="input.placeholder()"
+            />
+            {{ input.error }}
+          </div>
 
-          <input
-            type="text"
-            v-for="(input, index) in selectedStrategy.inputs"
-            :key="index"
-            :value="input.value"
-            @input="$event => input.onInput($event.target.value)"
-            :placeholder="input.placeholder()"
-          />
+          <button @submit="submit">Submit</button>
+
+          {{ error }}
         </div>
       </div>
     </div>
@@ -23,15 +25,10 @@
 </template>
 
 <script lang="ts">
-import {
-  computed,
-  defineComponent,
-  watch,
-  watchEffect,
-  ref
-} from "@nuxtjs/composition-api";
+import { defineComponent } from "@nuxtjs/composition-api";
 import { useSidebar } from "~/composables/useSidebar";
 import { protocolStrategies, DefineStrategy } from "~/core/strategies";
+import { useStrategy } from "~/composables/useStrategy";
 
 export default defineComponent({
   props: {
@@ -50,18 +47,14 @@ export default defineComponent({
     const strategies: DefineStrategy[] =
       protocolStrategies[props.protocol] || [];
 
-    const selectedStrategy = ref(
+    const { inputs, submit, error } = useStrategy(
       strategies.find(strategy => strategy.id === props.strategy)
     );
 
-    watch([], () => {
-      selectedStrategy.value = strategies.find(
-        strategy => strategy.id === props.strategy
-      );
-    });
-
     return {
-      selectedStrategy
+      inputs,
+      error,
+      submit
     };
   }
 });
diff --git a/composables/useBalances.ts b/composables/useBalances.ts
index 6703772..8b4d2b2 100644
--- a/composables/useBalances.ts
+++ b/composables/useBalances.ts
@@ -20,8 +20,14 @@ import { useBigNumber } from "./useBigNumber";
 import { useSorting } from "./useSorting";
 
 const balances = reactive({
-  user: null,
-  dsa: null
+  user: {
+    mainnet: {},
+    polygon: {}
+  },
+  dsa: {
+    mainnet: {},
+    polygon: {}
+  }
 });
 
 const prices = reactive({
diff --git a/composables/useStrategy.ts b/composables/useStrategy.ts
new file mode 100644
index 0000000..7a19222
--- /dev/null
+++ b/composables/useStrategy.ts
@@ -0,0 +1,60 @@
+import { nextTick, onMounted, ref, watch } from "@nuxtjs/composition-api";
+import { buildStrategy, DefineStrategy, IStrategy } from "~/core/strategies";
+import { useBalances } from "./useBalances";
+import { useDSA } from "./useDSA";
+import { useWeb3 } from "./useWeb3";
+
+export function useStrategy(defineStrategy: DefineStrategy) {
+  const { web3, networkName } = useWeb3();
+  const { dsa } = useDSA();
+  const { prices, balances } = useBalances();
+
+  const strategy = buildStrategy(defineStrategy);
+  const inputs = ref(strategy.getInputs());
+  const error = ref("");
+
+  strategy.onUpdated(async () => {
+    await nextTick();
+
+    inputs.value = strategy.getInputs();
+  });
+
+  const submit = async () => {
+    try {
+      await strategy.submit();
+    } catch (e) {
+      error.value = e.message;
+    }
+  };
+
+  watch(web3, () => strategy.setWeb3(web3.value), { immediate: true });
+  watch(dsa, () => strategy.setDSA(dsa.value), { immediate: true });
+  watch(
+    prices,
+    () => strategy.setProps({ prices: prices[networkName.value] }),
+    { immediate: true }
+  );
+  watch(
+    balances,
+    () => {
+      strategy.setProps({
+        dsaTokens: balances.dsa[networkName.value],
+        userTokens: balances.user[networkName.value]
+      });
+    },
+    { immediate: true }
+  );
+
+  // testing
+  onMounted(() => {
+    //@ts-ignore
+    window.strategy = strategy;
+  });
+
+  return {
+    strategy,
+    inputs,
+    submit,
+    error,
+  };
+}
diff --git a/core/strategies/helpers/index.ts b/core/strategies/helpers/index.ts
new file mode 100644
index 0000000..97e08fa
--- /dev/null
+++ b/core/strategies/helpers/index.ts
@@ -0,0 +1,84 @@
+import DSA, { Spell } from "dsa-connect";
+import Web3 from "web3";
+import slugify from "slugify";
+import { Strategy } from "./strategy";
+export interface IStrategyContext {
+  dsa: DSA;
+  web3: Web3;
+  inputs: IStrategyInput<StrategyInputType>[];
+  dsaTokens?: IStrategyToken,
+  userTokens?: IStrategyToken,
+}
+
+export interface IStrategyToken {
+  address: string;
+  key: string;
+  symbol: string;
+  balance: string;
+
+  // supply: string;
+  // borrow: string;
+}
+
+export enum StrategyInputType {
+  INPUT = "input",
+  INPUT_WITH_TOKEN = "input-with-token"
+}
+
+export type StrategyInputParameterMap = {
+  [StrategyInputType.INPUT]: {};
+
+  [StrategyInputType.INPUT_WITH_TOKEN]: {
+    token?: IStrategyToken;
+  };
+};
+
+export interface IStrategyInput<InputType extends StrategyInputType> {
+  type: InputType;
+  name: string;
+  placeholder?: (
+    context: IStrategyContext & {
+      input: IStrategyInput<InputType> & StrategyInputParameterMap[InputType];
+    }
+  ) => string;
+  validate?: (
+    context: IStrategyContext & {
+      input: IStrategyInput<InputType> & StrategyInputParameterMap[InputType];
+    }
+  ) => string | void;
+  value?: any;
+
+  [key: string]: any;
+}
+
+export interface IStrategy {
+  id?: string;
+  name: string;
+  description: string;
+  author?: string;
+
+  inputs: IStrategyInput<StrategyInputType>[];
+
+  spells: (context: IStrategyContext) => Promise<Spell[]> | Spell[];
+
+  submitText?: string;
+}
+
+export function defineInput<InputType extends StrategyInputType>(
+  input: IStrategyInput<InputType>
+) {
+  return input as IStrategyInput<InputType>;
+}
+
+export function defineStrategy(strategy: IStrategy) {
+  return {
+    ...strategy,
+    id: strategy.id ? strategy.id : slugify(strategy.name).toLowerCase()
+  };
+}
+
+export function buildStrategy(schema: DefineStrategy) {
+  return new Strategy(schema)
+}
+
+export type DefineStrategy = ReturnType<typeof defineStrategy>;
diff --git a/core/strategies/helpers/strategy.ts b/core/strategies/helpers/strategy.ts
index ec31728..262a916 100644
--- a/core/strategies/helpers/strategy.ts
+++ b/core/strategies/helpers/strategy.ts
@@ -1,140 +1,130 @@
-import DSA, { Spell } from "dsa-connect";
+import DSA from "dsa-connect";
 import Web3 from "web3";
-import slugify from "slugify";
-export interface IStrategyContext {
-  dsa: DSA;
-  web3: Web3;
-  inputs: IStrategyInput<StrategyInputType>[];
-}
+import { DefineStrategy, IStrategyContext } from ".";
 
-export interface IStrategyToken {
-  address: string;
-  key: string;
-  symbol: string;
-  balance: string;
-
-  supply: string;
-  borrow: string;
-}
-
-export enum StrategyInputType {
-  INPUT = "input",
-  INPUT_WITH_TOKEN = "input-with-token"
-}
-
-export type StrategyInputParameterMap = {
-  [StrategyInputType.INPUT]: {};
-
-  [StrategyInputType.INPUT_WITH_TOKEN]: {
-    token?: IStrategyToken;
-  };
-};
-
-export interface IStrategyInput<InputType extends StrategyInputType> {
-  type: InputType;
-  name: string;
-  placeholder: (
-    context: IStrategyContext & {
-      input: IStrategyInput<InputType> & StrategyInputParameterMap[InputType];
-    }
-  ) => string;
-  validate?: (
-    context: IStrategyContext & {
-      input: IStrategyInput<InputType> & StrategyInputParameterMap[InputType];
-    }
-  ) => string | void;
-  value?: any;
-
-  [key: string]: any;
-}
-
-export interface IStrategy {
-  id?: string;
-  name: string;
-  description: string;
-  author?: string;
-
-  inputs: IStrategyInput<any>[];
-
-  spells: (context: IStrategyContext) => Promise<Spell[]> | Spell[];
-
-  submitText?: string;
-}
-
-export function defineInput<InputType extends StrategyInputType>(
-  input: IStrategyInput<InputType>
-) {
-  return input as IStrategyInput<any>;
-}
-
-export function defineStrategy(strategy: IStrategy) {
-  const context = {
+export class Strategy {
+  schema: DefineStrategy;
+  inputs = [];
+  context = {
     web3: null,
     dsa: null
   };
 
-  return {
-    ...strategy,
-    id: strategy.id ? strategy.id : slugify(strategy.name).toLowerCase(),
-    inputs: strategy.inputs.map(input => ({
+  listeners = [];
+
+  props: object = {
+    prices: {},
+    dsaTokens: {},
+    userTokens: {},
+  };
+
+  constructor(schema: DefineStrategy) {
+    this.schema = schema;
+
+    this.inputs = this.schema.inputs;
+  }
+
+  getContext(): IStrategyContext {
+    return {
+      ...this.context,
+      ...this.props,
+      inputs: this.getInputs()
+    };
+  }
+
+  setProps(props: object) {
+    Object.assign(this.props, props);
+  }
+
+  getInputs() {
+    return this.inputs.map(input => ({
       ...input,
-      value: null,
+      value: input.value || "",
+      error: input.error || "",
       placeholder: () =>
         input.placeholder
           ? input.placeholder({
-              ...context,
-              inputs: strategy.inputs,
+              ...this.context,
+              inputs: this.inputs,
               input: {
                 ...input,
                 token: {
-                    // todo
+                  // todo
                 }
               }
             })
           : null,
       onInput: (val: any) => {
+        input.error = "";
         input.value = val;
-      }
-    })),
-    submit: async () => {
-      await this.validate({
-        ...context,
-        inputs: strategy.inputs
-      });
 
-      const allSpells = await strategy.spells({
-        ...context,
-        inputs: strategy.inputs
-      });
-
-      const spells = context.dsa.Spell();
-
-      for (const spell of allSpells) {
-        spells.add(spell);
-      }
-
-      return await context.dsa.cast({
-        spells,
-        onReceipt: this.onReceipt
-      });
-    },
-    validate: async () => {
-      for (const input of this.inputs) {
-        const result = await input.validate({
-          ...context,
-          inputs: strategy.inputs,
-          input
-        });
-
-        if (result !== true) {
-          throw new Error(result || "Error has occurred");
+        if (val) {
+          input.error = input.validate({
+            ...this.getContext(),
+            input
+          });
         }
-      }
-    },
-    onReceipt: (txHash: string, txReceipt: any) => {
-      // do something
-    }
-  };
-}
 
-export type DefineStrategy = ReturnType<typeof defineStrategy>;
+        this.notifyListeners();
+      }
+    }));
+  }
+
+  async submit() {
+    await this.validate();
+
+    const allSpells = await this.schema.spells(this.getContext());
+
+    const spells = this.context.dsa.Spell();
+
+    console.log(spells);
+    
+    for (const spell of allSpells) {
+      spells.add(spell);
+    }
+
+    return await this.context.dsa.cast({
+      spells,
+      onReceipt: this.onReceipt
+    });
+  }
+
+  async validate() {
+    const inputs = this.getInputs();
+
+    for (const input of inputs) {
+      const result = await input.validate({
+        ...this.getContext(),
+        input
+      });
+
+      if (typeof result === "string") {
+        throw new Error(result || "Error has occurred");
+      }
+    }
+  }
+
+  onReceipt(txHash: string, txReceipt: any) {
+    // do something
+  }
+
+  setWeb3(web3: Web3) {
+    console.log(web3);
+    
+    this.context.web3 = web3;
+  }
+
+  setDSA(dsa: DSA) {
+    this.context.dsa = dsa;
+  }
+
+  async notifyListeners() {
+    for (const listener of this.listeners) {
+      await listener(this);
+    }
+  }
+
+  onUpdated(cb) {
+    this.listeners.push(cb);
+  }
+}
diff --git a/core/strategies/index.ts b/core/strategies/index.ts
index 6fc2f7e..fdc6272 100644
--- a/core/strategies/index.ts
+++ b/core/strategies/index.ts
@@ -4,4 +4,4 @@ export const protocolStrategies = {
     aaveV2 : AaveV2,
 }
 
-export * from "./helpers/strategy"
\ No newline at end of file
+export * from "./helpers"
\ No newline at end of file
diff --git a/core/strategies/protocols/aave-v2/deposit-and-borrow.ts b/core/strategies/protocols/aave-v2/deposit-and-borrow.ts
index a2c04e8..129aaab 100644
--- a/core/strategies/protocols/aave-v2/deposit-and-borrow.ts
+++ b/core/strategies/protocols/aave-v2/deposit-and-borrow.ts
@@ -2,7 +2,7 @@ import {
   defineStrategy,
   defineInput,
   StrategyInputType
-} from "../../helpers/strategy";
+} from "../../helpers";
 
 export default defineStrategy({
   name: "Deposit & Borrow",