diff --git a/packages/ui/.papi/descriptors/package.json b/packages/ui/.papi/descriptors/package.json
index 336562601..771d33f6a 100644
--- a/packages/ui/.papi/descriptors/package.json
+++ b/packages/ui/.papi/descriptors/package.json
@@ -1,15 +1,15 @@
 {
-  "version": "0.1.0-autogenerated.6583868000815430009",
+  "version": "0.1.0-autogenerated.4649279494484163350",
   "name": "@polkadot-api/descriptors",
   "files": [
     "dist"
   ],
   "exports": {
     ".": {
+      "types": "./dist/index.d.ts",
       "module": "./dist/index.mjs",
       "import": "./dist/index.mjs",
-      "require": "./dist/index.js",
-      "default": "./dist/index.js"
+      "require": "./dist/index.js"
     },
     "./package.json": "./package.json"
   },
diff --git a/packages/ui/package.json b/packages/ui/package.json
index f6f86197a..2ed9e33a8 100644
--- a/packages/ui/package.json
+++ b/packages/ui/package.json
@@ -22,7 +22,7 @@
     "graphql": "^16.8.1",
     "graphql-request": "^6.1.0",
     "graphql-ws": "^5.16.0",
-    "polkadot-api": "^1.0.1",
+    "polkadot-api": "^1.2.0",
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "react-icons": "^5.1.0",
diff --git a/packages/ui/src/components/modals/ProposalSigning.tsx b/packages/ui/src/components/modals/ProposalSigning.tsx
index d3f9e6a2c..2b9f76114 100644
--- a/packages/ui/src/components/modals/ProposalSigning.tsx
+++ b/packages/ui/src/components/modals/ProposalSigning.tsx
@@ -7,10 +7,8 @@ import { useApi } from '../../contexts/ApiContext'
 import { useMultiProxy } from '../../contexts/MultiProxyContext'
 import CallInfo from '../CallInfo'
 import SignerSelection from '../select/SignerSelection'
-import { useToasts } from '../../contexts/ToastContext'
 import { useSigningCallback } from '../../hooks/useSigningCallback'
 import { HexString, MultisigStorageInfo } from '../../types'
-import { useGetSubscanLinks } from '../../hooks/useSubscanLink'
 import { getDisplayArgs, getExtrinsicName } from '../../utils'
 import { useCallInfoFromCallData } from '../../hooks/useCallInfoFromCallData'
 import { ModalCloseButton } from '../library/ModalCloseButton'
@@ -21,8 +19,6 @@ import { getAsMultiTx } from '../../utils/getAsMultiTx'
 import { CallDataInfoFromChain } from '../../hooks/usePendingTx'
 import { debounce } from '../../utils/debounce'
 import { FixedSizeBinary, Transaction } from 'polkadot-api'
-import { DotCalls, DotQueries } from '@polkadot-api/descriptors'
-import { Multisig } from '@polkadot/types/interfaces'
 
 export interface SigningModalProps {
   onClose: () => void
@@ -39,7 +35,6 @@ const ProposalSigning = ({
   proposalData,
   onSuccess
 }: SigningModalProps) => {
-  const { getSubscanExtrinsicLink } = useGetSubscanLinks()
   const { api } = useApi()
   const [isSubmitting, setIsSubmitting] = useState(false)
   const { getMultisigByAddress, setRefetchMultisigTimeoutMinutes } = useMultiProxy()
@@ -47,7 +42,6 @@ const ProposalSigning = ({
   const [addedCallData, setAddedCallData] = useState<HexString | undefined>()
   const [debouncedAddedCallData, setDebouncedAddedCallData] = useState<HexString | undefined>()
   const [errorMessage, setErrorMessage] = useState('')
-  const { addToast } = useToasts()
   const multisig = useMemo(
     () => getMultisigByAddress(proposalData.from),
     [getMultisigByAddress, proposalData]
@@ -88,8 +82,13 @@ const ProposalSigning = ({
 
   const onSubmitting = useCallback(() => {
     setIsSubmitting(false)
+    // poll for 1min if the tx may make changes
+    // such as creating a proxy, adding/removing a multisig
+    if (mustProvideCallData) {
+      setRefetchMultisigTimeoutMinutes(1)
+    }
     onClose()
-  }, [onClose])
+  }, [mustProvideCallData, onClose, setRefetchMultisigTimeoutMinutes])
 
   const signCallback = useSigningCallback({ onSuccess, onSubmitting })
   const { getSortAddress } = useGetSortAddress()
@@ -158,8 +157,8 @@ const ProposalSigning = ({
         return
       }
 
-      if (!selectedAccount) {
-        const error = 'No selected address'
+      if (!selectedAccount || !selectedSigner) {
+        const error = 'No selected address or selectedSigner'
         console.error(error)
         setErrorMessage(error)
         return
@@ -218,24 +217,24 @@ const ProposalSigning = ({
 
         // If we can submit the proposal and have the call data
       } else if (shouldExecute && callInfo?.call && callInfo?.weight) {
-        tx = getAsMultiTx({
+        tx = await getAsMultiTx({
           api,
           threshold,
           otherSignatories: otherSigners,
           weight: callInfo.weight,
           when: proposalData.info.when,
-          tx: proposalData.callData || addedCallData
+          callData: proposalData.callData || addedCallData
         })
 
         // if we can't submit yet (more signatures required), all we need is the call hash
       } else if (!shouldExecute && proposalData.hash) {
-        tx = api.tx.multisig.approveAsMulti(
+        tx = api.tx.Multisig.approve_as_multi({
           threshold,
-          otherSigners,
-          proposalData.info.when,
-          proposalData.hash,
-          { refTime: 0, proofSize: 0 }
-        )
+          other_signatories: otherSigners,
+          maybe_timepoint: proposalData.info.when,
+          call_hash: FixedSizeBinary.fromText(proposalData.hash),
+          max_weight: { ref_time: 0n, proof_size: 0n }
+        })
       } else {
         console.error("We don't have the required data to submit the call")
         return
@@ -246,26 +245,7 @@ const ProposalSigning = ({
         return
       }
 
-      tx.signAndSend(
-        selectedAccount.address,
-        { signer: selectedSigner, withSignedTransaction: true },
-        signCallback
-      )
-        .then(() => {
-          // poll for 1min if the tx may make changes
-          // such as creating a proxy, adding/removing a multisig
-          if (mustProvideCallData) {
-            setRefetchMultisigTimeoutMinutes(1)
-          }
-        })
-        .catch((error: Error) => {
-          setIsSubmitting(false)
-          addToast({
-            title: error.message,
-            type: 'error',
-            link: getSubscanExtrinsicLink(tx.hash.toHex())
-          })
-        })
+      tx.signSubmitAndWatch(selectedSigner, { at: 'best' }).subscribe(signCallback)
     },
     [
       getSortAddress,
@@ -280,10 +260,7 @@ const ProposalSigning = ({
       hasReachedThreshold,
       selectedSigner,
       signCallback,
-      addedCallData,
-      setRefetchMultisigTimeoutMinutes,
-      addToast,
-      getSubscanExtrinsicLink
+      addedCallData
     ]
   )
 
diff --git a/packages/ui/src/contexts/AccountsContext.tsx b/packages/ui/src/contexts/AccountsContext.tsx
index 8924404b6..4efcd4c03 100644
--- a/packages/ui/src/contexts/AccountsContext.tsx
+++ b/packages/ui/src/contexts/AccountsContext.tsx
@@ -5,6 +5,7 @@ import { DAPP_NAME } from '../constants'
 import { Signer } from '@polkadot/api/types'
 import { useApi } from './ApiContext'
 import { encodeAccounts } from '../utils/encodeAccounts'
+import { PolkadotSigner } from 'polkadot-api'
 
 const LOCALSTORAGE_SELECTED_ACCOUNT_KEY = 'multix.selectedAccount'
 const LOCALSTORAGE_ALLOWED_CONNECTION_KEY = 'multix.canConnectToExtension'
@@ -21,7 +22,7 @@ export interface IAccountContext {
   getAccountByAddress: (address: string) => InjectedAccountWithMeta | undefined
   isAccountLoading: boolean
   isExtensionError: boolean
-  selectedSigner?: Signer
+  selectedSigner?: PolkadotSigner
   allowConnectionToExtension: () => void
   isAllowedToConnectToExtension: boolean
   isLocalStorageSetupDone: boolean
@@ -34,7 +35,7 @@ const AccountContextProvider = ({ children }: AccountContextProps) => {
   const [selectedAccount, setSelected] = useState<InjectedAccountWithMeta>(ownAccountList[0])
   const [isAccountLoading, setIsAccountLoading] = useState(false)
   const [isExtensionError, setIsExtensionError] = useState(false)
-  const [selectedSigner, setSelectedSigner] = useState<Signer | undefined>()
+  const [selectedSigner, setSelectedSigner] = useState<PolkadotSigner | undefined>()
   const [isAllowedToConnectToExtension, setIsAllowedToConnectToExtension] = useState(false)
   const ownAddressList = useMemo(() => ownAccountList.map((a) => a.address), [ownAccountList])
   const [accountGotRequested, setAccountGotRequested] = useState(false)
@@ -161,7 +162,7 @@ const AccountContextProvider = ({ children }: AccountContextProps) => {
 
     web3FromSource(selectedAccount.meta.source)
       .then((injector) => {
-        setSelectedSigner(injector.signer)
+        setSelectedSigner(injector.signer as PolkadotSigner)
       })
       .catch(console.error)
   })
diff --git a/packages/ui/src/contexts/ApiContext.tsx b/packages/ui/src/contexts/ApiContext.tsx
index da3760477..fd90f25cd 100644
--- a/packages/ui/src/contexts/ApiContext.tsx
+++ b/packages/ui/src/contexts/ApiContext.tsx
@@ -148,7 +148,6 @@ const ApiContextProvider = ({ children }: ApiContextProps) => {
 
       const isEthereum = ethereumChains.includes(name)
 
-      console.log('Chain properties', properties)
       setChainInfo({
         // some parachains such as interlay have a comma in the format, e.g: "2,042"
         ss58Format: Number(properties?.ss58Format.replace(',', '')) || 0,
diff --git a/packages/ui/src/hooks/useSigningCallback.tsx b/packages/ui/src/hooks/useSigningCallback.tsx
index e4a5c57ed..e4b41f6a8 100644
--- a/packages/ui/src/hooks/useSigningCallback.tsx
+++ b/packages/ui/src/hooks/useSigningCallback.tsx
@@ -1,9 +1,10 @@
-import { ISubmittableResult } from '@polkadot/types/types'
+// import { ISubmittableResult } from '@polkadot/types/types'
 import { useApi } from '../contexts/ApiContext'
 import { useGetSubscanLinks } from './useSubscanLink'
 import { useToasts } from '../contexts/ToastContext'
-import { getIncompleteMessage } from '../utils/extinsicErrorChecks'
-import { EventRecord } from '@polkadot/types/interfaces'
+// import { getIncompleteMessage } from '../utils/extinsicErrorChecks'
+// import { EventRecord } from '@polkadot/types/interfaces'
+import { TxEvent } from 'polkadot-api'
 
 interface Args {
   onSubmitting?: () => void
@@ -17,12 +18,12 @@ export const useSigningCallback = ({ onSubmitting, onSuccess, onFinalized, onErr
   const { api } = useApi()
   const { getSubscanExtrinsicLink } = useGetSubscanLinks()
 
-  return ({ events = [], status, txHash }: ISubmittableResult) => {
+  return (event: TxEvent) => {
     onSubmitting && onSubmitting()
-    console.log('Transaction status:', status.type)
-    const link = getSubscanExtrinsicLink(txHash.toHex())
+    console.log('Transaction hash:', event.txHash)
+    const link = getSubscanExtrinsicLink(event.txHash)
 
-    if (status.isBroadcast) {
+    if (event.type === 'broadcasted') {
       addToast({ title: `Tx broadcasted`, type: 'loading', link })
     }
 
@@ -33,58 +34,78 @@ export const useSigningCallback = ({ onSubmitting, onSuccess, onFinalized, onErr
       return
     }
 
-    if (status.isInBlock) {
-      console.log('Included at block hash', status.asInBlock.toHex())
-      console.log('Events:')
+    if (event.type === 'txBestBlocksState' && event.found) {
+      if (event.dispatchError) {
+        console.log('DispatchError', event.dispatchError)
 
-      events.forEach(({ event, phase }) => {
-        const { data, method, section } = event
-        console.log('\t', phase.toString(), `: ${section}.${method}`, data.toString())
-
-        const incomplete = getIncompleteMessage({ event } as EventRecord)
-
-        // check if multisig or proxy or batch has an error
-        if (incomplete) {
-          errorInfo = incomplete
+        if (
+          event.dispatchError.type === 'Module' &&
+          !!(event.dispatchError.value as any)?.value?.type
+        ) {
+          errorInfo = (event.dispatchError.value as any)?.value?.type
         }
+      }
 
-        // if the extrinsic fails alltogether
-        if (!errorInfo && api.events.system.ExtrinsicFailed.is(event)) {
-          // extract the data for this event
-          const dispatchError = data[0]
-
-          // decode the error
-          if ((dispatchError as any).isModule) {
-            // for module errors, we have the section indexed, lookup
-            // (For specific known errors, we can also do a check against the
-            // api.errors.<module>.<ErrorName>.is(dispatchError.asModule) guard)
-            const decoded = api.registry.findMetaError((dispatchError as any).asModule)
-
-            errorInfo = `${decoded.docs} - ${decoded.section}.${decoded.name}`
-          } else {
-            // Other, CannotLookup, BadOrigin, no extra info
-            errorInfo = dispatchError.toString()
-          }
+      event.events.forEach((event) => {
+        console.log(JSON.stringify(event, (_, v) => (typeof v === 'bigint' ? v.toString() : v)))
+
+        // interrupted batch
+        if (event.type === 'Utility' && event.value.type === 'BatchInterrupted') {
+          errorInfo = event.value.value.error.type
         }
 
-        if (api.events.system.ExtrinsicSuccess.is(event)) {
+        // if it's a success and there's been no error nested in
+        if (event.type === 'System' && event.value.type === 'ExtrinsicSuccess') {
           !errorInfo &&
             !toastErrorShown &&
             addToast({ title: 'Tx in block', type: 'success', link })
           onSuccess && onSuccess()
         }
-
-        if (!!errorInfo && !toastErrorShown) {
-          addToast({ title: errorInfo, type: 'error', link })
-          onError && onError(errorInfo)
-          // prevent showing several errors
-          toastErrorShown = true
-        }
       })
-    } else if (status.isFinalized) {
+
+      if (!!errorInfo && !toastErrorShown) {
+        addToast({ title: errorInfo, type: 'error', link })
+        onError && onError(errorInfo)
+        // prevent showing several errors
+        toastErrorShown = true
+      }
+    }
+
+    if (event.type === 'finalized') {
+      console.log('finalized:', event)
       onFinalized && onFinalized()
-      // !errorInfo && addToast({ title: "Tx finalized", type: "success", link })
-      console.log('Finalized block hash', status.asFinalized.toHex())
+
+      // event.events.forEach(({type, value}) => {
+      // const { data, method, section } = event
+
+      // console.log('\t', phase.toString(), `: ${section}.${method}`, data.toString())
+
+      // const incomplete = getIncompleteMessage({ event } as EventRecord)
+
+      // // check if multisig or proxy or batch has an error
+      // if (incomplete) {
+      //   errorInfo = incomplete
+      // }
+
+      // if the extrinsic fails alltogether
+      // if (!errorInfo && api.events.system.ExtrinsicFailed.is(event)) {
+      //   // extract the data for this event
+      //   const dispatchError = data[0]
+
+      //   // decode the error
+      //   if ((dispatchError as any).isModule) {
+      //     // for module errors, we have the section indexed, lookup
+      //     // (For specific known errors, we can also do a check against the
+      //     // api.errors.<module>.<ErrorName>.is(dispatchError.asModule) guard)
+      //     const decoded = api.registry.findMetaError((dispatchError as any).asModule)
+
+      //     errorInfo = `${decoded.docs} - ${decoded.section}.${decoded.name}`
+      //   } else {
+      //     // Other, CannotLookup, BadOrigin, no extra info
+      //     errorInfo = dispatchError.toString()
+      //   }
+      // }
+      // })
     }
   }
 }
diff --git a/packages/ui/src/types.ts b/packages/ui/src/types.ts
index b16a77cd3..eedd8893e 100644
--- a/packages/ui/src/types.ts
+++ b/packages/ui/src/types.ts
@@ -23,5 +23,5 @@ export interface SubmittingCall {
   call?: GenericCall
   method?: string
   section?: string
-  weight?: Weight
+  weight?: { ref_time: bigint; proof_size: bigint }
 }
diff --git a/packages/ui/src/utils/getAsMultiTx.ts b/packages/ui/src/utils/getAsMultiTx.ts
index 289501468..ccb5bc083 100644
--- a/packages/ui/src/utils/getAsMultiTx.ts
+++ b/packages/ui/src/utils/getAsMultiTx.ts
@@ -1,13 +1,12 @@
 import { MultisigStorageInfo } from '../types'
-import { Transaction, TypedApi } from 'polkadot-api'
-import { dot } from '@polkadot-api/descriptors'
+import { Binary, HexString, Transaction } from 'polkadot-api'
 import { ApiType } from '../contexts/ApiContext'
 
 interface Params {
   api: ApiType
   threshold: number
   otherSignatories: string[]
-  tx: Transaction<any, any, any, any>
+  callData?: HexString
   weight?: { ref_time: bigint; proof_size: bigint }
   when?: MultisigStorageInfo['when']
 }
@@ -15,18 +14,19 @@ interface Params {
 // TODO check if  we can do this with papi
 // const LEGACY_ASMULTI_PARAM_LENGTH = 6
 
-export const getAsMultiTx = ({
+export const getAsMultiTx = async ({
   api,
   threshold,
   otherSignatories,
-  tx,
+  callData,
   weight,
   when
-}: Params): Transaction<any, any, any, any> | undefined => {
-  if (!tx) return
+}: Params): Promise<Transaction<any, any, any, any> | undefined> => {
+  if (!callData) return
 
-  // TODO remove this assertion
-  return (api as TypedApi<typeof dot>).tx.Multisig.as_multi({
+  const tx = await api.txFromCallData(Binary.fromHex(callData))
+
+  return api.tx.Multisig.as_multi({
     threshold,
     other_signatories: otherSignatories,
     maybe_timepoint: when,
diff --git a/yarn.lock b/yarn.lock
index f36a9e436..d31d5dbb7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3105,22 +3105,20 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot-api/cli@npm:0.7.5":
-  version: 0.7.5
-  resolution: "@polkadot-api/cli@npm:0.7.5"
+"@polkadot-api/cli@npm:0.8.1":
+  version: 0.8.1
+  resolution: "@polkadot-api/cli@npm:0.8.1"
   dependencies:
     "@commander-js/extra-typings": ^12.1.0
-    "@polkadot-api/codegen": 0.8.0
+    "@polkadot-api/codegen": 0.10.0
     "@polkadot-api/json-rpc-provider": 0.0.3
-    "@polkadot-api/json-rpc-provider-proxy": 0.2.0
-    "@polkadot-api/known-chains": 0.4.0
-    "@polkadot-api/metadata-builders": 0.5.0
-    "@polkadot-api/metadata-compatibility": 0.1.2
-    "@polkadot-api/observable-client": 0.5.1
-    "@polkadot-api/polkadot-sdk-compat": 2.0.0
+    "@polkadot-api/known-chains": 0.5.1
+    "@polkadot-api/metadata-compatibility": 0.1.4
+    "@polkadot-api/observable-client": 0.5.3
+    "@polkadot-api/polkadot-sdk-compat": 2.1.0
     "@polkadot-api/sm-provider": 0.1.1
     "@polkadot-api/smoldot": 0.3.2
-    "@polkadot-api/substrate-bindings": 0.6.3
+    "@polkadot-api/substrate-bindings": 0.7.0
     "@polkadot-api/substrate-client": 0.2.1
     "@polkadot-api/utils": 0.1.1
     "@polkadot-api/wasm-executor": ^0.1.1
@@ -3132,28 +3130,26 @@ __metadata:
     ora: ^8.0.1
     read-pkg: ^9.0.1
     rxjs: ^7.8.1
-    scale-ts: ^1.6.0
     tsc-prog: ^2.3.0
     tsup: ^8.2.4
     typescript: ^5.5.4
     write-package: ^7.1.0
-    ws: ^8.18.0
   bin:
     papi: dist/main.js
     polkadot-api: dist/main.js
-  checksum: 40f282390fd756fdd7e75b7862df5523b7c35821df1128cee7a297fce215c7055d2b845e4b4958e2e9890235a8b2674ef2512b1d7e3caea05efafe3dcd95119c
+  checksum: a27d033b0f42cc79f6e9552f057593b98a246717afb9488790d7748a905a40b4446edc95a4ba0abb4203116ab88910cfae47cb02a0661f51bc81282d92d8cad0
   languageName: node
   linkType: hard
 
-"@polkadot-api/codegen@npm:0.8.0":
-  version: 0.8.0
-  resolution: "@polkadot-api/codegen@npm:0.8.0"
+"@polkadot-api/codegen@npm:0.10.0":
+  version: 0.10.0
+  resolution: "@polkadot-api/codegen@npm:0.10.0"
   dependencies:
-    "@polkadot-api/metadata-builders": 0.5.0
-    "@polkadot-api/metadata-compatibility": 0.1.2
-    "@polkadot-api/substrate-bindings": 0.6.3
+    "@polkadot-api/metadata-builders": 0.7.0
+    "@polkadot-api/metadata-compatibility": 0.1.4
+    "@polkadot-api/substrate-bindings": 0.7.0
     "@polkadot-api/utils": 0.1.1
-  checksum: 3955073e75a709913e74efff583cfd9d478d75955cea46435b01bf58bc6d6cba6d60875546fb15d8bdc597869a6d8e96952f6178ed5a66f4f431486a79c3a751
+  checksum: 983847e80d6106844cec2c968df06e436e0451433b9ed12dbfc89f4bb5f2e853d583040b7b07200b3e212856705aa434249a44ca83bfea167326c6447a06aad5
   languageName: node
   linkType: hard
 
@@ -3200,19 +3196,19 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@polkadot-api/known-chains@npm:0.4.0":
-  version: 0.4.0
-  resolution: "@polkadot-api/known-chains@npm:0.4.0"
-  checksum: df6fc9bbb2f9cedcd636dc7d89052f3823dcd90348d3b2e11e1f5a4cdec9187cd74c0e50bc96f731c760f1d6b760b88396f0b8d569b703ef1d3e0212c3d34806
+"@polkadot-api/known-chains@npm:0.5.1":
+  version: 0.5.1
+  resolution: "@polkadot-api/known-chains@npm:0.5.1"
+  checksum: c44c173b84fb7a61e42ae9735b919c9d331089907d2a0efb16453f332b80ae00bd53ea1235593ffafe248edb5af9aa0d0f18b3e3b8f79c4a25cb4fb2fc950a32
   languageName: node
   linkType: hard
 
-"@polkadot-api/logs-provider@npm:0.0.3":
-  version: 0.0.3
-  resolution: "@polkadot-api/logs-provider@npm:0.0.3"
+"@polkadot-api/logs-provider@npm:0.0.5":
+  version: 0.0.5
+  resolution: "@polkadot-api/logs-provider@npm:0.0.5"
   dependencies:
-    "@polkadot-api/json-rpc-provider": 0.0.2
-  checksum: d40843b41077fa1045881d6c36424f8896b87e3f3661d85e631761b9a377b4d11b60c77613a2ea4bc047e692ea2aaf2674409b6c30950821f863b84b6395fd8f
+    "@polkadot-api/json-rpc-provider": 0.0.3
+  checksum: fc4cd29ae48b8be5b9fc40fd7c0b02a6a9eb66c8c6db78fb9de4525aab2f9a479331d1c06aa9a8b3fe8cf90b0634321fe44895e5ebbdbbafe415488a1e5792b9
   languageName: node
   linkType: hard
 
@@ -3226,24 +3222,23 @@ __metadata:
   languageName: node
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