diff --git a/package.json b/package.json
index adf1e4ca6..d78bc0058 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "@babel/core": "^7.14.6",
-    "@polkadot/dev": "^0.62.44",
+    "@polkadot/dev": "^0.62.47",
     "@polkadot/ts": "^0.4.2",
     "@types/jest": "^26.0.23"
   },
diff --git a/yarn.lock b/yarn.lock
index 47e0fa8ec..0b085901c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1431,6 +1431,24 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@humanwhocodes/config-array@npm:^0.5.0":
+  version: 0.5.0
+  resolution: "@humanwhocodes/config-array@npm:0.5.0"
+  dependencies:
+    "@humanwhocodes/object-schema": ^1.2.0
+    debug: ^4.1.1
+    minimatch: ^3.0.4
+  checksum: 44ee6a9f05d93dd9d5935a006b17572328ba9caff8002442f601736cbda79c580cc0f5a49ce9eb88fbacc5c3a6b62098357c2e95326cd17bb9f1a6c61d6e95e7
+  languageName: node
+  linkType: hard
+
+"@humanwhocodes/object-schema@npm:^1.2.0":
+  version: 1.2.0
+  resolution: "@humanwhocodes/object-schema@npm:1.2.0"
+  checksum: 40b75480376de8104d65f7c44a7dd76d30fb57823ca8ba3a3239b2b568323be894d93440578a72fd8e5e2cc3df3577ce0d2f0fe308b990dd51cf35392bf3c9a2
+  languageName: node
+  linkType: hard
+
 "@istanbuljs/load-nyc-config@npm:^1.0.0":
   version: 1.1.0
   resolution: "@istanbuljs/load-nyc-config@npm:1.1.0"
@@ -1934,9 +1952,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot/dev@npm:^0.62.44":
-  version: 0.62.44
-  resolution: "@polkadot/dev@npm:0.62.44"
+"@polkadot/dev@npm:^0.62.47":
+  version: 0.62.47
+  resolution: "@polkadot/dev@npm:0.62.47"
   dependencies:
     "@babel/cli": ^7.14.5
     "@babel/core": ^7.14.6
@@ -1957,6 +1975,10 @@ __metadata:
     "@babel/preset-typescript": ^7.14.5
     "@babel/register": ^7.14.5
     "@babel/runtime": ^7.14.6
+    "@rollup/plugin-alias": ^3.1.2
+    "@rollup/plugin-commonjs": ^19.0.0
+    "@rollup/plugin-json": ^4.1.0
+    "@rollup/plugin-node-resolve": ^13.0.0
     "@rushstack/eslint-patch": ^1.0.6
     "@typescript-eslint/eslint-plugin": 4.28.1
     "@typescript-eslint/parser": 4.28.1
@@ -1968,7 +1990,7 @@ __metadata:
     browserslist: ^4.16.6
     chalk: ^4.1.1
     coveralls: ^3.1.1
-    eslint: ^7.29.0
+    eslint: ^7.30.0
     eslint-config-standard: ^16.0.3
     eslint-import-resolver-node: ^0.3.4
     eslint-plugin-header: ^3.1.1
@@ -1994,6 +2016,7 @@ __metadata:
     mkdirp: ^1.0.4
     prettier: ^2.3.2
     rimraf: ^3.0.2
+    rollup: ^2.52.7
     typescript: ^4.3.5
     yargs: ^17.0.1
   bin:
@@ -2014,9 +2037,10 @@ __metadata:
     polkadot-exec-ghpages: scripts/polkadot-exec-ghpages.cjs
     polkadot-exec-ghrelease: scripts/polkadot-exec-ghrelease.cjs
     polkadot-exec-prettier: scripts/polkadot-exec-prettier.cjs
+    polkadot-exec-rollup: scripts/polkadot-exec-rollup.cjs
     polkadot-exec-tsc: scripts/polkadot-exec-tsc.cjs
     polkadot-exec-webpack: scripts/polkadot-exec-webpack.cjs
-  checksum: c93bb8f8309360fd7d1ccf1e19f77a6908fdb7ffc3e404717a0616489a93c15bc22561a8c71a5f05d967842747fdac8307060400415b5914e9974ae740264cb3
+  checksum: 5ecb4d643044fe27762b155eeb4004a0879807bace87dc92b2eb03eada03fcb35eac38505f67e6676b8dac88b2a7e6814cc9689b258832fa46e4b79b1b02851b
   languageName: node
   linkType: hard
 
@@ -2221,6 +2245,74 @@ __metadata:
   languageName: unknown
   linkType: soft
 
+"@rollup/plugin-alias@npm:^3.1.2":
+  version: 3.1.2
+  resolution: "@rollup/plugin-alias@npm:3.1.2"
+  dependencies:
+    slash: ^3.0.0
+  peerDependencies:
+    rollup: ^1.20.0||^2.0.0
+  checksum: c7256ab186e73fe59326c642362064c2b4bc2c5b22ad69e994a0966e132bdc120f00dc4eb278e0734bc45f1fd6ae73f269ff68dab74505973fbd284a6580bb37
+  languageName: node
+  linkType: hard
+
+"@rollup/plugin-commonjs@npm:^19.0.0":
+  version: 19.0.0
+  resolution: "@rollup/plugin-commonjs@npm:19.0.0"
+  dependencies:
+    "@rollup/pluginutils": ^3.1.0
+    commondir: ^1.0.1
+    estree-walker: ^2.0.1
+    glob: ^7.1.6
+    is-reference: ^1.2.1
+    magic-string: ^0.25.7
+    resolve: ^1.17.0
+  peerDependencies:
+    rollup: ^2.38.3
+  checksum: 83216ccd83c205f5b6ce278ce5233289a1ebf47fd859d6349d738b58e967bbb845395011f8605cf6a74175b728ed3b97fbfd9169bd0391caf5ee80c523652815
+  languageName: node
+  linkType: hard
+
+"@rollup/plugin-json@npm:^4.1.0":
+  version: 4.1.0
+  resolution: "@rollup/plugin-json@npm:4.1.0"
+  dependencies:
+    "@rollup/pluginutils": ^3.0.8
+  peerDependencies:
+    rollup: ^1.20.0 || ^2.0.0
+  checksum: 867bc9339b4ccf0b9ff3b2617a95b3b8920115163f86c8e3b1f068a14ca25949472d3c05b09a5ac38ca0fe2185756e34617eaeb219d4a2b6e2307c501c7d4552
+  languageName: node
+  linkType: hard
+
+"@rollup/plugin-node-resolve@npm:^13.0.0":
+  version: 13.0.0
+  resolution: "@rollup/plugin-node-resolve@npm:13.0.0"
+  dependencies:
+    "@rollup/pluginutils": ^3.1.0
+    "@types/resolve": 1.17.1
+    builtin-modules: ^3.1.0
+    deepmerge: ^4.2.2
+    is-module: ^1.0.0
+    resolve: ^1.19.0
+  peerDependencies:
+    rollup: ^2.42.0
+  checksum: c0237e65f50d593efc176e07a2ddf734918bc7344f739fe2254a3bfaa4be37c6d4787d045ab79d741811d3658f7e8bbb1484e6aa25bbb9fe2a3c33472b3f371d
+  languageName: node
+  linkType: hard
+
+"@rollup/pluginutils@npm:^3.0.8, @rollup/pluginutils@npm:^3.1.0":
+  version: 3.1.0
+  resolution: "@rollup/pluginutils@npm:3.1.0"
+  dependencies:
+    "@types/estree": 0.0.39
+    estree-walker: ^1.0.1
+    picomatch: ^2.2.2
+  peerDependencies:
+    rollup: ^1.20.0||^2.0.0
+  checksum: 8be16e27863c219edbb25a4e6ec2fe0e1e451d9e917b6a43cf2ae5bc025a6b8faaa40f82a6e53b66d0de37b58ff472c6c3d57a83037ae635041f8df959d6d9aa
+  languageName: node
+  linkType: hard
+
 "@rushstack/eslint-patch@npm:^1.0.6":
   version: 1.0.6
   resolution: "@rushstack/eslint-patch@npm:1.0.6"
@@ -2347,6 +2439,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/estree@npm:*":
+  version: 0.0.49
+  resolution: "@types/estree@npm:0.0.49"
+  checksum: a01577ca7bdb30a668ac92d07122afcca8b1eb44d95ae1efe6dfefbc0b54953a137d7c2ebcab034568f1c04f2a42e85bf6bb97af47cdfaf9d5f01e58ac27ecf5
+  languageName: node
+  linkType: hard
+
+"@types/estree@npm:0.0.39":
+  version: 0.0.39
+  resolution: "@types/estree@npm:0.0.39"
+  checksum: 412fb5b9868f2c418126451821833414189b75cc6bf84361156feed733e3d92ec220b9d74a89e52722e03d5e241b2932732711b7497374a404fad49087adc248
+  languageName: node
+  linkType: hard
+
 "@types/filesystem@npm:*":
   version: 0.0.29
   resolution: "@types/filesystem@npm:0.0.29"
@@ -2501,6 +2607,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/resolve@npm:1.17.1":
+  version: 1.17.1
+  resolution: "@types/resolve@npm:1.17.1"
+  dependencies:
+    "@types/node": "*"
+  checksum: dc6a6df507656004e242dcb02c784479deca516d5f4b58a1707e708022b269ae147e1da0521f3e8ad0d63638869d87e0adc023f0bd5454aa6f72ac66c7525cf5
+  languageName: node
+  linkType: hard
+
 "@types/responselike@npm:^1.0.0":
   version: 1.0.0
   resolution: "@types/responselike@npm:1.0.0"
@@ -3576,6 +3691,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"builtin-modules@npm:^3.1.0":
+  version: 3.2.0
+  resolution: "builtin-modules@npm:3.2.0"
+  checksum: 0265aa1ba78e1a16f4e18668d815cb43fb364e6a6b8aa9189c6f44c7b894a551a43b323c40206959d2d4b2568c1f2805607ad6c88adc306a776ce6904cca6715
+  languageName: node
+  linkType: hard
+
 "cache-base@npm:^1.0.1":
   version: 1.0.1
   resolution: "cache-base@npm:1.0.1"
@@ -5023,12 +5145,13 @@ __metadata:
   languageName: node
   linkType: hard
 
-"eslint@npm:^7.29.0":
-  version: 7.29.0
-  resolution: "eslint@npm:7.29.0"
+"eslint@npm:^7.30.0":
+  version: 7.30.0
+  resolution: "eslint@npm:7.30.0"
   dependencies:
     "@babel/code-frame": 7.12.11
     "@eslint/eslintrc": ^0.4.2
+    "@humanwhocodes/config-array": ^0.5.0
     ajv: ^6.10.0
     chalk: ^4.0.0
     cross-spawn: ^7.0.2
@@ -5068,7 +5191,7 @@ __metadata:
     v8-compile-cache: ^2.0.3
   bin:
     eslint: bin/eslint.js
-  checksum: 8a18377c761560a29fb48b27458517f260f7854882e40cf7e2d38f0ba60ac1038f39404e0ea849abdda18699530fe055adc5bdbf1ef726ce91ac1482cac9d38c
+  checksum: 872f90844b164dd61ec1bb949d2e33e7fbd189e0652fabe2cbbd0bdce1e4cd7ed08e72fa213795a453ae39fe24460771800608e765febb9e778deb28b9db3cc1
   languageName: node
   linkType: hard
 
@@ -5125,6 +5248,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"estree-walker@npm:^1.0.1":
+  version: 1.0.1
+  resolution: "estree-walker@npm:1.0.1"
+  checksum: 7e70da539691f6db03a08e7ce94f394ce2eef4180e136d251af299d41f92fb2d28ebcd9a6e393e3728d7970aeb5358705ddf7209d52fbcb2dd4693f95dcf925f
+  languageName: node
+  linkType: hard
+
+"estree-walker@npm:^2.0.1":
+  version: 2.0.2
+  resolution: "estree-walker@npm:2.0.2"
+  checksum: 6151e6f9828abe2259e57f5fd3761335bb0d2ebd76dc1a01048ccee22fabcfef3c0859300f6d83ff0d1927849368775ec5a6d265dde2f6de5a1be1721cd94efc
+  languageName: node
+  linkType: hard
+
 "esutils@npm:^2.0.2":
   version: 2.0.3
   resolution: "esutils@npm:2.0.3"
@@ -5610,7 +5747,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-fsevents@^2.3.2:
+"fsevents@^2.3.2, fsevents@~2.3.2":
   version: 2.3.2
   resolution: "fsevents@npm:2.3.2"
   dependencies:
@@ -5619,7 +5756,7 @@ fsevents@^2.3.2:
   languageName: node
   linkType: hard
 
-"fsevents@patch:fsevents@^2.3.2#~builtin<compat/fsevents>":
+"fsevents@patch:fsevents@^2.3.2#~builtin<compat/fsevents>, fsevents@patch:fsevents@~2.3.2#~builtin<compat/fsevents>":
   version: 2.3.2
   resolution: "fsevents@patch:fsevents@npm%3A2.3.2#~builtin<compat/fsevents>::version=2.3.2&hash=1cc4b2"
   dependencies:
@@ -6573,6 +6710,13 @@ fsevents@~2.1.2:
   languageName: node
   linkType: hard
 
+"is-module@npm:^1.0.0":
+  version: 1.0.0
+  resolution: "is-module@npm:1.0.0"
+  checksum: 8cd5390730c7976fb4e8546dd0b38865ee6f7bacfa08dfbb2cc07219606755f0b01709d9361e01f13009bbbd8099fa2927a8ed665118a6105d66e40f1b838c3f
+  languageName: node
+  linkType: hard
+
 "is-negative-zero@npm:^2.0.1":
   version: 2.0.1
   resolution: "is-negative-zero@npm:2.0.1"
@@ -6661,6 +6805,15 @@ fsevents@~2.1.2:
   languageName: node
   linkType: hard
 
+"is-reference@npm:^1.2.1":
+  version: 1.2.1
+  resolution: "is-reference@npm:1.2.1"
+  dependencies:
+    "@types/estree": "*"
+  checksum: e7b48149f8abda2c10849ea51965904d6a714193d68942ad74e30522231045acf06cbfae5a4be2702fede5d232e61bf50b3183acdc056e6e3afe07fcf4f4b2bc
+  languageName: node
+  linkType: hard
+
 "is-regex@npm:^1.1.3":
   version: 1.1.3
   resolution: "is-regex@npm:1.1.3"
@@ -7857,6 +8010,15 @@ fsevents@~2.1.2:
   languageName: node
   linkType: hard
 
+"magic-string@npm:^0.25.7":
+  version: 0.25.7
+  resolution: "magic-string@npm:0.25.7"
+  dependencies:
+    sourcemap-codec: ^1.4.4
+  checksum: 727a1fb70f9610304fe384f1df0251eb7d1d9dd779c07ef1225690361b71b216f26f5d934bfb11c919b5b0e7ba50f6240c823a6f2e44cfd33d4a07d7747ca829
+  languageName: node
+  linkType: hard
+
 "make-dir@npm:^2.0.0, make-dir@npm:^2.1.0":
   version: 2.1.0
   resolution: "make-dir@npm:2.1.0"
@@ -8798,7 +8960,7 @@ fsevents@~2.1.2:
   languageName: node
   linkType: hard
 
-"picomatch@npm:^2.0.4, picomatch@npm:^2.2.1, picomatch@npm:^2.2.3":
+"picomatch@npm:^2.0.4, picomatch@npm:^2.2.1, picomatch@npm:^2.2.2, picomatch@npm:^2.2.3":
   version: 2.3.0
   resolution: "picomatch@npm:2.3.0"
   checksum: 16818720ea7c5872b6af110760dee856c8e4cd79aed1c7a006d076b1cc09eff3ae41ca5019966694c33fbd2e1cc6ea617ab10e4adac6df06556168f13be3fca2
@@ -9568,7 +9730,7 @@ fsevents@~2.1.2:
   languageName: node
   linkType: hard
 
-"resolve@^1.1.6, resolve@^1.10.0, resolve@^1.10.1, resolve@^1.13.1, resolve@^1.14.2, resolve@^1.19.0, resolve@^1.20.0":
+"resolve@^1.1.6, resolve@^1.10.0, resolve@^1.10.1, resolve@^1.13.1, resolve@^1.14.2, resolve@^1.17.0, resolve@^1.19.0, resolve@^1.20.0":
   version: 1.20.0
   resolution: "resolve@npm:1.20.0"
   dependencies:
@@ -9588,7 +9750,7 @@ resolve@^2.0.0-next.3:
   languageName: node
   linkType: hard
 
-"resolve@patch:resolve@^1.1.6#~builtin<compat/resolve>, resolve@patch:resolve@^1.10.0#~builtin<compat/resolve>, resolve@patch:resolve@^1.10.1#~builtin<compat/resolve>, resolve@patch:resolve@^1.13.1#~builtin<compat/resolve>, resolve@patch:resolve@^1.14.2#~builtin<compat/resolve>, resolve@patch:resolve@^1.19.0#~builtin<compat/resolve>, resolve@patch:resolve@^1.20.0#~builtin<compat/resolve>":
+"resolve@patch:resolve@^1.1.6#~builtin<compat/resolve>, resolve@patch:resolve@^1.10.0#~builtin<compat/resolve>, resolve@patch:resolve@^1.10.1#~builtin<compat/resolve>, resolve@patch:resolve@^1.13.1#~builtin<compat/resolve>, resolve@patch:resolve@^1.14.2#~builtin<compat/resolve>, resolve@patch:resolve@^1.17.0#~builtin<compat/resolve>, resolve@patch:resolve@^1.19.0#~builtin<compat/resolve>, resolve@patch:resolve@^1.20.0#~builtin<compat/resolve>":
   version: 1.20.0
   resolution: "resolve@patch:resolve@npm%3A1.20.0#~builtin<compat/resolve>::version=1.20.0&hash=00b1ff"
   dependencies:
@@ -9662,12 +9824,26 @@ resolve@^2.0.0-next.3:
   languageName: node
   linkType: hard
 
+"rollup@npm:^2.52.7":
+  version: 2.52.7
+  resolution: "rollup@npm:2.52.7"
+  dependencies:
+    fsevents: ~2.3.2
+  dependenciesMeta:
+    fsevents:
+      optional: true
+  bin:
+    rollup: dist/bin/rollup
+  checksum: 92629c518c234f5f02249ed225fdb8c0bc25039ee91e3713107bf3b859344b81d986cbad71d793b6a973d852a495c2e5352c9d628eae992818036c0b45ea843c
+  languageName: node
+  linkType: hard
+
 "root-workspace-0b6124@workspace:.":
   version: 0.0.0-use.local
   resolution: "root-workspace-0b6124@workspace:."
   dependencies:
     "@babel/core": ^7.14.6
-    "@polkadot/dev": ^0.62.44
+    "@polkadot/dev": ^0.62.47
     "@polkadot/ts": ^0.4.2
     "@types/jest": ^26.0.23
   languageName: unknown
@@ -10044,6 +10220,13 @@ resolve@^2.0.0-next.3:
   languageName: node
   linkType: hard
 
+"sourcemap-codec@npm:^1.4.4":
+  version: 1.4.8
+  resolution: "sourcemap-codec@npm:1.4.8"
+  checksum: b57981c05611afef31605732b598ccf65124a9fcb03b833532659ac4d29ac0f7bfacbc0d6c5a28a03e84c7510e7e556d758d0bb57786e214660016fb94279316
+  languageName: node
+  linkType: hard
+
 "spdx-correct@npm:^3.0.0":
   version: 3.1.1
   resolution: "spdx-correct@npm:3.1.1"