diff --git a/packages/fcl-core/src/exec/mutate.js b/packages/fcl-core/src/exec/mutate.ts
similarity index 55%
rename from packages/fcl-core/src/exec/mutate.js
rename to packages/fcl-core/src/exec/mutate.ts
index c2744eef4..45b99267f 100644
--- a/packages/fcl-core/src/exec/mutate.js
+++ b/packages/fcl-core/src/exec/mutate.ts
@@ -1,31 +1,42 @@
+import type {AccountAuthorization} from "@onflow/sdk"
 import * as sdk from "@onflow/sdk"
-import {normalizeArgs} from "./utils/normalize-args"
-import {getCurrentUser} from "../current-user"
-import {prepTemplateOpts} from "./utils/prep-template-opts.js"
-import {preMutate} from "./utils/pre.js"
+import {CurrentUserService, getCurrentUser} from "../current-user"
 import {isNumber} from "../utils/is"
+import type {ArgsFn} from "./args"
+import {normalizeArgs} from "./utils/normalize-args"
+import {preMutate} from "./utils/pre"
+import {prepTemplateOpts} from "./utils/prep-template-opts"
+
+export interface MutateOptions {
+  cadence?: string
+  args?: ArgsFn
+  template?: any
+  limit?: number
+  authz?: AccountAuthorization
+  proposer?: AccountAuthorization
+  payer?: AccountAuthorization
+  authorizations?: AccountAuthorization[]
+}
 
 /**
- * @description
- * Factory function that returns a mutate function for a given currentUser.
+ * @description Factory function that returns a mutate function for a given currentUser.
  *
- * @param {ReturnType<typeof import("../current-user").getCurrentUser> | import("../current-user").CurrentUserConfig} currentUserOrConfig - CurrentUser actor or configuration
+ * @param currentUserOrConfig CurrentUser actor or configuration
  */
-export const getMutate = currentUserOrConfig => {
+export const getMutate = (currentUserOrConfig: CurrentUserService) => {
   /**
-   * @description
-   * Allows you to submit transactions to the blockchain to potentially mutate the state.
+   * @description Allows you to submit transactions to the blockchain to potentially mutate the state.
    *
-   * @param {object} [opts] - Mutation Options and configuration
-   * @param {string} [opts.cadence] - Cadence Transaction used to mutate Flow
-   * @param {import("./args").ArgsFn} [opts.args] - Arguments passed to cadence transaction
-   * @param {object | string} [opts.template] - Interaction Template for a transaction
-   * @param {number} [opts.limit] - Compute Limit for transaction
-   * @param {Function} [opts.authz] - Authorization function for transaction
-   * @param {Function} [opts.proposer] - Proposer Authorization function for transaction
-   * @param {Function} [opts.payer] - Payer Authorization function for transaction
-   * @param {Array<Function>} [opts.authorizations] - Authorizations function for transaction
-   * @returns {Promise<string>} Transaction Id
+   * @param opts Mutation Options and configuration
+   * @param opts.cadence Cadence Transaction used to mutate Flow
+   * @param opts.args Arguments passed to cadence transaction
+   * @param opts.template Interaction Template for a transaction
+   * @param opts.limit Compute Limit for transaction
+   * @param opts.authz Authorization function for transaction
+   * @param opts.proposer Proposer Authorization function for transaction
+   * @param opts.payer Payer Authorization function for transaction
+   * @param opts.authorizations Authorizations function for transaction
+   * @returns Transaction Id
    *
    * @example
    * fcl.mutate({
@@ -59,7 +70,7 @@ export const getMutate = currentUserOrConfig => {
    *   authorizations: [AuthzFn], // an array of authorization functions used as authorizations signatory roles
    * }
    */
-  const mutate = async (opts = {}) => {
+  const mutate = async (opts: MutateOptions = {}): Promise<string> => {
     var txid
     try {
       await preMutate(opts)
@@ -67,17 +78,17 @@ export const getMutate = currentUserOrConfig => {
       // Allow for a config to overwrite the authorization function.
       // prettier-ignore
       const currentUser = typeof currentUserOrConfig === "function" ? currentUserOrConfig : getCurrentUser(currentUserOrConfig)
-      const authz = await sdk
+      const authz: any = await sdk
         .config()
         .get("fcl.authz", currentUser().authorization)
 
       txid = sdk
         .send([
-          sdk.transaction(opts.cadence),
+          sdk.transaction(opts.cadence!),
 
           sdk.args(normalizeArgs(opts.args || [])),
 
-          opts.limit && isNumber(opts.limit) && sdk.limit(opts.limit),
+          opts.limit && isNumber(opts.limit) && (sdk.limit(opts.limit!) as any),
 
           // opts.proposer > opts.authz > authz
           sdk.proposer(opts.proposer || opts.authz || authz),
diff --git a/packages/fcl-core/src/exec/query.js b/packages/fcl-core/src/exec/query.js
deleted file mode 100644
index bee2ebcba..000000000
--- a/packages/fcl-core/src/exec/query.js
+++ /dev/null
@@ -1,48 +0,0 @@
-import * as sdk from "@onflow/sdk"
-import * as config from "@onflow/config"
-import {normalizeArgs} from "./utils/normalize-args"
-import {prepTemplateOpts} from "./utils/prep-template-opts.js"
-import {preQuery} from "./utils/pre.js"
-
-/**
- * @description
- * Allows you to submit scripts to query the blockchain.
- *
- *  @param {object} opts - Query Options and configuration
- *  @param {string} opts.cadence - Cadence Script used to query Flow
- *  @param {import("./args").ArgsFn} [opts.args] - Arguments passed to cadence script
- *  @param {object | string} [opts.template] - Interaction Template for a script
- *  @param {boolean} [opts.isSealed] - Block Finality
- *  @param {number} [opts.limit]   - Compute Limit for Query
- *  @returns {Promise}
- *
- *  @example
- *    const cadence = `
- *      cadence: `
- *        access(all) fun main(a: Int, b: Int, c: Address): Int {
- *          log(c)
- *          return a + b
- *        }
- *    `.trim()
- *
- *    const args = (arg, t) => [
- *      arg(5, t.Int),
- *      arg(7, t.Int),
- *      arg("0xb2db43ad6bc345fec9", t.Address),
- *    ]
- *
- *    await query({ cadence, args })
- */
-export async function query(opts = {}) {
-  await preQuery(opts)
-  opts = await prepTemplateOpts(opts)
-
-  return sdk
-    .send([
-      sdk.script(opts.cadence),
-      sdk.args(normalizeArgs(opts.args || [])),
-      sdk.atLatestBlock(opts.isSealed ?? false),
-      opts.limit && typeof opts.limit === "number" && sdk.limit(opts.limit),
-    ])
-    .then(sdk.decode)
-}
diff --git a/packages/fcl-core/src/exec/query.ts b/packages/fcl-core/src/exec/query.ts
new file mode 100644
index 000000000..db7d44723
--- /dev/null
+++ b/packages/fcl-core/src/exec/query.ts
@@ -0,0 +1,57 @@
+import * as sdk from "@onflow/sdk"
+import type {ArgsFn} from "./args"
+import {normalizeArgs} from "./utils/normalize-args"
+import {preQuery} from "./utils/pre"
+import {prepTemplateOpts} from "./utils/prep-template-opts"
+
+export interface QueryOptions {
+  cadence?: string
+  args?: ArgsFn
+  template?: any
+  isSealed?: boolean
+  limit?: number
+}
+
+/**
+ * @description Allows you to submit scripts to query the blockchain.
+ *
+ * @param opts Query Options and configuration
+ * @param opts.cadence Cadence Script used to query Flow
+ * @param opts.args Arguments passed to cadence script
+ * @param opts.template Interaction Template for a script
+ * @param opts.isSealed Block Finality
+ * @param opts.limit Compute Limit for Query
+ * @returns A promise that resolves to the query result
+ *
+ * @example
+ *    const cadence = `
+ *      cadence: `
+ *        access(all) fun main(a: Int, b: Int, c: Address): Int {
+ *          log(c)
+ *          return a + b
+ *        }
+ *    `.trim()
+ *
+ *    const args = (arg, t) => [
+ *      arg(5, t.Int),
+ *      arg(7, t.Int),
+ *      arg("0xb2db43ad6bc345fec9", t.Address),
+ *    ]
+ *
+ *    await query({ cadence, args })
+ */
+export async function query(opts: QueryOptions = {}): Promise<any> {
+  await preQuery(opts)
+  opts = await prepTemplateOpts(opts)
+
+  return sdk
+    .send([
+      sdk.script(opts.cadence!),
+      sdk.args(normalizeArgs(opts.args || [])),
+      sdk.atLatestBlock(opts.isSealed ?? false),
+      opts.limit &&
+        typeof opts.limit === "number" &&
+        (sdk.limit(opts.limit!) as any),
+    ])
+    .then(sdk.decode)
+}
diff --git a/packages/fcl-core/src/exec/utils/normalize-args.js b/packages/fcl-core/src/exec/utils/normalize-args.js
deleted file mode 100644
index b0cc38589..000000000
--- a/packages/fcl-core/src/exec/utils/normalize-args.js
+++ /dev/null
@@ -1,8 +0,0 @@
-import {isFunc} from "../../utils/is"
-import * as sdk from "@onflow/sdk"
-import * as t from "@onflow/types"
-
-export function normalizeArgs(ax) {
-  if (isFunc(ax)) return ax(sdk.arg, t)
-  return []
-}
diff --git a/packages/fcl-core/src/exec/utils/normalize-args.ts b/packages/fcl-core/src/exec/utils/normalize-args.ts
new file mode 100644
index 000000000..401843156
--- /dev/null
+++ b/packages/fcl-core/src/exec/utils/normalize-args.ts
@@ -0,0 +1,9 @@
+import {isFunc} from "../../utils/is"
+import * as sdk from "@onflow/sdk"
+import * as t from "@onflow/types"
+import type {ArgsFn} from "../args"
+
+export function normalizeArgs(ax: ArgsFn | any[] | undefined): any[] {
+  if (isFunc(ax)) return (ax as ArgsFn)(sdk.arg, t)
+  return []
+}
diff --git a/packages/fcl-core/src/exec/utils/pre.js b/packages/fcl-core/src/exec/utils/pre.ts
similarity index 79%
rename from packages/fcl-core/src/exec/utils/pre.js
rename to packages/fcl-core/src/exec/utils/pre.ts
index a92962836..3a807b2e9 100644
--- a/packages/fcl-core/src/exec/utils/pre.js
+++ b/packages/fcl-core/src/exec/utils/pre.ts
@@ -2,7 +2,12 @@ import {invariant} from "@onflow/util-invariant"
 import * as sdk from "@onflow/sdk"
 import {isRequired, isObject, isString} from "../../utils/is"
 
-async function pre(type, opts) {
+export interface PreOptions {
+  cadence?: string
+  template?: any
+}
+
+async function pre(type: string, opts: PreOptions): Promise<void> {
   // prettier-ignore
   invariant(isRequired(opts), `${type}(opts) -- opts is required`)
   // prettier-ignore
@@ -23,10 +28,10 @@ async function pre(type, opts) {
   )
 }
 
-export async function preMutate(opts) {
+export async function preMutate(opts: PreOptions): Promise<void> {
   return pre("mutate", opts)
 }
 
-export async function preQuery(opts) {
+export async function preQuery(opts: PreOptions): Promise<void> {
   return pre("query", opts)
 }
diff --git a/packages/fcl-core/src/exec/utils/prep-template-opts.test.js b/packages/fcl-core/src/exec/utils/prep-template-opts.test.ts
similarity index 98%
rename from packages/fcl-core/src/exec/utils/prep-template-opts.test.js
rename to packages/fcl-core/src/exec/utils/prep-template-opts.test.ts
index d6d2218a8..8520c514e 100644
--- a/packages/fcl-core/src/exec/utils/prep-template-opts.test.js
+++ b/packages/fcl-core/src/exec/utils/prep-template-opts.test.ts
@@ -1,5 +1,5 @@
 import {config} from "@onflow/config"
-import {prepTemplateOpts} from "./prep-template-opts.js"
+import {prepTemplateOpts} from "./prep-template-opts"
 
 describe("Prepare template options for template version 1.0.0", () => {
   // NOTE: template10 and template11 copied from packages\fcl-core\src\interaction-template-utils\derive-cadence-by-network\derive-cadence-by-network.test.js
@@ -175,7 +175,7 @@ describe("Prepare template options for template version 1.1.0", () => {
 
     const test = async () =>
       await prepTemplateOpts({
-        template: template,
+        template: template11,
       })
 
     await expect(test()).rejects.toThrow(Error)
diff --git a/packages/fcl-core/src/exec/utils/prep-template-opts.js b/packages/fcl-core/src/exec/utils/prep-template-opts.ts
similarity index 68%
rename from packages/fcl-core/src/exec/utils/prep-template-opts.js
rename to packages/fcl-core/src/exec/utils/prep-template-opts.ts
index ca48549a3..96b314c68 100644
--- a/packages/fcl-core/src/exec/utils/prep-template-opts.js
+++ b/packages/fcl-core/src/exec/utils/prep-template-opts.ts
@@ -1,9 +1,16 @@
 import {retrieve} from "../../document/document"
-import {deriveCadenceByNetwork} from "../../interaction-template-utils/derive-cadence-by-network/derive-cadence-by-network.js"
+import {deriveCadenceByNetwork} from "../../interaction-template-utils/derive-cadence-by-network/derive-cadence-by-network"
 import {isString} from "../../utils/is"
 import {getChainId} from "../../utils"
 
-export async function prepTemplateOpts(opts) {
+export interface TemplateOptions {
+  cadence?: string
+  template?: any
+}
+
+export async function prepTemplateOpts(
+  opts: TemplateOptions
+): Promise<TemplateOptions> {
   if (isString(opts?.template)) {
     opts.template = await retrieve({url: opts?.template})
   }
diff --git a/packages/fcl-core/src/exec/verify.js b/packages/fcl-core/src/exec/verify.ts
similarity index 74%
rename from packages/fcl-core/src/exec/verify.js
rename to packages/fcl-core/src/exec/verify.ts
index 7c64450af..7f0484d40 100644
--- a/packages/fcl-core/src/exec/verify.js
+++ b/packages/fcl-core/src/exec/verify.ts
@@ -2,16 +2,14 @@ import {log} from "@onflow/util-logger"
 import {verifyUserSignatures as verify} from "../app-utils"
 
 /**
- * Verify a valid signature/s for an account on Flow.
- *
+ * @description Verify a valid signature/s for an account on Flow.
  * @deprecated since version '1.0.0-alpha.0', use AppUtils.verifyUserSignatures instead
- *
  */
 export const verifyUserSignatures = log.deprecate({
   pkg: "FCL",
   subject: "fcl.verifyUserSignatures()",
   message: "Please use fcl.AppUtils.verifyUserSignatures()",
-  callback: function verifyUserSignatures(message, compSigs) {
+  callback: function verifyUserSignatures(message: any, compSigs: any) {
     return verify(message, compSigs)
   },
 })
diff --git a/packages/fcl-core/src/interaction-template-utils/get-interaction-template-audits.js b/packages/fcl-core/src/interaction-template-utils/get-interaction-template-audits.js
index 8c59d595a..633f8e3d1 100644
--- a/packages/fcl-core/src/interaction-template-utils/get-interaction-template-audits.js
+++ b/packages/fcl-core/src/interaction-template-utils/get-interaction-template-audits.js
@@ -1,6 +1,6 @@
 import {config, invariant} from "@onflow/sdk"
 import {log, LEVELS} from "@onflow/util-logger"
-import {query} from "../exec/query.js"
+import {query} from "../exec/query"
 import {generateTemplateId} from "./generate-template-id/generate-template-id.js"
 import {getChainId} from "../utils"
 
diff --git a/packages/sdk/src/sdk.ts b/packages/sdk/src/sdk.ts
index ca50e8058..0aa14d78f 100644
--- a/packages/sdk/src/sdk.ts
+++ b/packages/sdk/src/sdk.ts
@@ -43,8 +43,12 @@ export {
 } from "./interaction/interaction"
 import type {CadenceArgument} from "./interaction/interaction"
 export {CadenceArgument} // Workaround for babel https://github.com/babel/babel/issues/8361
-import type {InteractionBuilderFn} from "./interaction/interaction"
-export {InteractionBuilderFn}
+import type {
+  InteractionBuilderFn,
+  AccountAuthorization,
+  AuthorizationFn,
+} from "./interaction/interaction"
+export {InteractionBuilderFn, AccountAuthorization, AuthorizationFn}
 
 export {createSignableVoucher, voucherToTxId} from "./resolve/voucher"
 export {encodeMessageFromSignable} from "./wallet-utils/encode-signable"