Claim tokens app (#1485)

* Ethereum pk -> address

* [WIP] Claim tokens app

* cleanup

* refactor

* Fixup address extraction

* Use card instead of Inset (UI alignment)

* Tadaaa! Claiming works.

* Uppercase token name

* Claim location (& overall spacing)

* Remove stray console.error

* Some documentation around utils

packages/app-claims/LICENSE

@@ -0,0 +1,201 @@
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packages/app-claims/README.md

@@ -0,0 +1 @@
+# @polkadot/app-claims

packages/app-claims/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "@polkadot/app-claims",
+  "version": "0.34.0-beta.123",
+  "description": "An app for claiming Polkadot tokens",
+  "main": "index.js",
+  "scripts": {},
+  "author": "Keith Ingram <keith@parity.io>",
+  "maintainers": [
+    "Keith Ingram <keith@parity.io>",
+    "Jaco Greeff <jacogr@gmail.com>"
+  ],
+  "license": "Apache-2.0",
+  "dependencies": {
+    "@babel/runtime": "^7.5.5",
+    "@polkadot/react-components": "^0.34.0-beta.123"
+  }
+}

packages/app-claims/src/.test-jaco.json

@@ -0,0 +1,6 @@
+{
+  "address": "0x002309df96687e44280bb72c3818358faeeb699c",
+  "msg": "Pay KSMs to the Kusama account:88dc3417d5058ec4b4503e0c12ea1a0a89be200fe98922423d4334014fa6b0ee",
+  "sig": "0x55bd020bdbbdc02de34e915effc9b18a99002f4c29f64e22e8dcbb69e722ea6c28e1bb53b9484063fbbfd205e49dcc1f620929f520c9c4c3695150f05a28f52a01",
+  "version": "2"
+}

packages/app-claims/src/.test-keith.json

@@ -0,0 +1,6 @@
+{
+  "address": "0xe71026fcbcecc825f848bcba05cb52bc250bca92",
+  "msg": "Pay KSMs to the Kusama account:5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty",
+  "sig": "0x98adffe14b1882ba5a861d6aaa10805d52aed56f480e1ece01505a77470f29f15cb4b0a1dc33177761de8270199282baf160f255e1ca0e4c8354b54b0059e40a1c",
+  "version": "2"
+}

packages/app-claims/src/Claim.tsx

@@ -0,0 +1,152 @@
+/* eslint-disable @typescript-eslint/camelcase */
+// Copyright 2017-2019 @polkadot/app-123code authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { Option } from '@polkadot/types';
+import { BalanceOf, EthereumAddress } from '@polkadot/types/interfaces';
+import { I18nProps } from '@polkadot/react-components/types';
+import { ApiProps } from '@polkadot/react-api/types';
+
+import React from 'react';
+import styled from 'styled-components';
+import { withApi, withMulti } from '@polkadot/react-api';
+import { Button, Card } from '@polkadot/react-components';
+import { formatBalance } from '@polkadot/util';
+
+import translate from './translate';
+import { addrToChecksum } from './util';
+
+const ClaimInner = styled.div`
+  font-size: 1.15rem;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  min-height: 12rem;
+  align-items: center;
+  margin: 0 1rem;
+
+  h3 {
+    font-family: monospace;
+    font-size: 1.5rem;
+    max-width: 100%;
+    margin: 0.5rem;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  h2 {
+    margin: 0.5rem 0 2rem
+    font-family: monospace;
+    font-size: 2.5rem;
+    font-weight: 200;
+  }
+`;
+
+interface Props extends ApiProps, I18nProps {
+  button: React.ReactNode;
+  ethereumAddress: EthereumAddress | null;
+}
+
+interface State {
+  claim: BalanceOf | null;
+  ethereumAddress: EthereumAddress | null;
+  hasClaim: boolean;
+  isBusy: boolean;
+}
+
+class Claim extends React.PureComponent<Props, State> {
+  public static getDerivedStateFromProps ({ ethereumAddress }: Props, state: State): Pick<State, never> {
+    if (ethereumAddress) {
+      return {
+        ethereumAddress,
+        hasClaim: state.claim && state.claim.gten(0)
+      };
+    }
+
+    return {
+      hasClaim: false
+    };
+  }
+
+  public state: State = {
+    claim: null,
+    ethereumAddress: null,
+    hasClaim: false,
+    isBusy: false
+  }
+
+  public componentDidMount (): void {
+    this.fetchClaim();
+  }
+
+  public componentDidUpdate (_: Props, prevState: State): void {
+    const { ethereumAddress } = this.state;
+    if (ethereumAddress !== prevState.ethereumAddress) {
+      this.fetchClaim();
+    }
+  }
+
+  public render (): React.ReactNode {
+    const { button, t } = this.props;
+    const { claim, ethereumAddress, hasClaim, isBusy } = this.state;
+
+    if (isBusy || !ethereumAddress) {
+      return null;
+    }
+
+    return (
+      <Card
+        isError={!hasClaim || !claim}
+        isSuccess={hasClaim && !!claim}
+      >
+        <ClaimInner>
+          {t('Your Ethereum account')}
+          <h3>{addrToChecksum(ethereumAddress.toString())}</h3>
+          {hasClaim && !!claim
+            ? (
+              <>
+                {t('has a valid claim for')}
+                <h2>{formatBalance(claim)}</h2>
+                <Button.Group>
+                  {button}
+                </Button.Group>
+              </>
+            )
+            : (
+              <>
+                {t('does not appear to have a valid claim. Please double check that you have signed the transaction correctly on the correct ETH account.')}
+              </>
+            )}
+        </ClaimInner>
+      </Card>
+    );
+  }
+
+  private fetchClaim (): void {
+    const { api } = this.props;
+    const { ethereumAddress } = this.state;
+
+    if (!ethereumAddress) {
+      return;
+    }
+
+    this.setState({ isBusy: true }, (): void => {
+      api.query.claims
+        .claims<Option<BalanceOf>>(ethereumAddress.toHex())
+        .then((claim): void => {
+          this.setState({
+            claim: claim.unwrapOr(null),
+            isBusy: false
+          });
+        });
+    });
+  }
+}
+
+export default withMulti(
+  Claim,
+  translate,
+  withApi
+);

packages/app-claims/src/index.tsx

@@ -0,0 +1,234 @@
+/* eslint-disable @typescript-eslint/camelcase */
+// Copyright 2017-2019 @polkadot/app-123code authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { Compact } from '@polkadot/types';
+import { Balance, EcdsaSignature, EthereumAddress } from '@polkadot/types/interfaces';
+import { AppProps, I18nProps } from '@polkadot/react-components/types';
+import { ApiProps } from '@polkadot/react-api/types';
+
+import React from 'react';
+import { Trans } from 'react-i18next';
+import styled from 'styled-components';
+import CopyToClipboard from 'react-copy-to-clipboard';
+import { withApi, withMulti } from '@polkadot/react-api';
+import { Button, Card, Columar, Column, Tooltip } from '@polkadot/react-components';
+import { InputNumber } from '@polkadot/react-components/InputNumber';
+import TxModal, { TxModalState, TxModalProps } from '@polkadot/react-components/TxModal';
+import { u8aToHex, u8aToString } from '@polkadot/util';
+import { decodeAddress } from '@polkadot/util-crypto';
+
+import ClaimDisplay from './Claim';
+import { recoverFromJSON } from './util';
+
+import translate from './translate';
+
+enum Step {
+  Account = 0,
+  Sign = 1,
+  Claim = 2,
+}
+
+interface Props extends AppProps, ApiProps, I18nProps, TxModalProps {}
+
+interface State extends TxModalState {
+  didCopy: boolean;
+  ethereumAddress?: EthereumAddress | null;
+  claim?: Balance | null;
+  signature?: EcdsaSignature | null;
+  step: Step;
+}
+
+const Payload = styled.pre`
+  cursor: copy;
+  font-family: monospace;
+  border: 1px dashed #c2c2c2;
+  background: #fafafa;
+  padding: 1rem;
+  width: 100%;
+  margin: 1rem 0;
+  white-space: normal;
+  word-break: break-all;
+`;
+
+const Signature = styled.textarea`
+  font-family: monospace;
+  padding: 1rem;
+  border: 1px solid rgba(34, 36, 38, 0.15);
+  border-radius: 0.25rem;
+  margin: 1rem 0;
+  resize: none;
+  width: 100%;
+`;
+
+class App extends TxModal<Props, State> {
+  public constructor (props: Props) {
+    super(props);
+
+    this.defaultState = {
+      ...this.defaultState,
+      claim: null,
+      didCopy: false,
+      ethereumAddress: null,
+      signature: null,
+      step: 0
+    };
+    this.state = this.defaultState;
+  }
+
+  public componentDidUpdate (): void {
+    if (this.state.didCopy) {
+      setTimeout((): void => {
+        this.setState({ didCopy: false });
+      }, 1000);
+    }
+  }
+
+  public render (): React.ReactNode {
+    const { api, t } = this.props;
+    const { accountId, didCopy, ethereumAddress, signature, step } = this.state;
+
+    const payload = accountId
+      ? (
+        u8aToString(Compact.stripLengthPrefix(api.consts.claims.prefix.toU8a(true))) +
+        u8aToHex(decodeAddress(accountId), -1, false)
+      )
+      : '';
+
+    return (
+      <main>
+        <header />
+        <h1>
+          <Trans>claim your <em>{InputNumber.units}</em> tokens</Trans>
+        </h1>
+        <Columar>
+          <Column>
+            <Card withBottomMargin>
+              <h3>{t('1. Select your Polkadot account')}</h3>
+              {this.renderInputAccount()}
+              {(step === Step.Account) && (
+                <Button.Group>
+                  <Button
+                    isPrimary
+                    onClick={this.setStep(Step.Sign)}
+                    label={t('Continue')}
+                  />
+                </Button.Group>
+              )}
+            </Card>
+            {(step >= Step.Sign && !!accountId) && (
+              <Card>
+                <h3>{t('2. Sign ETH transaction')}</h3>
+                <CopyToClipboard
+                  onCopy={this.onCopy}
+                  text={payload}
+                >
+                  <Payload
+                    data-for={`tx-payload`}
+                    data-tip
+                  >
+                    {payload}
+                  </Payload>
+                </CopyToClipboard>
+                <Tooltip
+                  place='right'
+                  text={didCopy ? t('copied') : t('click to copy')}
+                  trigger='tx-payload'
+                />
+                <div>
+                  {t('Copy the above string and sign an Ethereum transaction with the account you used during the pre-sale in the wallet of your choice, using the string as the payload, and then paste the transaction signature below')}
+                  :
+                </div>
+                <Signature
+                  onChange={this.onChangeSignature}
+                  rows={10}
+                />
+                {(step === Step.Sign) && (
+                  <Button.Group>
+                    <Button
+                      isDisabled={!accountId || !signature}
+                      isPrimary
+                      onClick={this.setStep(Step.Claim)}
+                      label={t('Confirm claim')}
+                    />
+                  </Button.Group>
+                )}
+              </Card>
+            )}
+          </Column>
+          <Column showEmptyText={false}>
+            {(step >= Step.Claim) && (
+              <ClaimDisplay
+                button={this.renderTxButton()}
+                ethereumAddress={ethereumAddress}
+              />
+            )}
+          </Column>
+        </Columar>
+      </main>
+    );
+  }
+
+  protected isDisabled = (): boolean => {
+    const { accountId, signature } = this.state;
+
+    return !accountId || !signature;
+  }
+
+  protected isUnsigned = (): boolean => true;
+
+  protected submitLabel = (): React.ReactNode => this.props.t('Redeem');
+
+  protected txMethod = (): string => 'claims.claim';
+
+  protected txParams = (): [string | null, EcdsaSignature | null] => {
+    const { accountId, signature } = this.state;
+
+    return [
+      accountId ? accountId.toString() : null,
+      signature || null
+    ];
+  }
+
+  protected onChangeAccount = (accountId: string | null): void => {
+    this.setState(({ step }: State): Pick<State, never> => {
+      return {
+        ...(
+          step > Step.Account
+            ? this.defaultState
+            : {}
+        ),
+        accountId
+      };
+    });
+  }
+
+  protected onChangeSignature = (event: React.SyntheticEvent<Element>): void => {
+    const { value: signatureJson } = event.target as HTMLInputElement;
+
+    this.setState(({ step }: State): Pick<State, never> => ({
+      ...(
+        step > Step.Sign
+          ? { step: Step.Sign }
+          : {}
+      ),
+      ...recoverFromJSON(signatureJson)
+    }));
+  }
+
+  private onCopy = (): void => {
+    this.setState({ didCopy: true });
+  }
+
+  private setStep = (step: Step): () => void =>
+    (): void => {
+      this.setState({ step });
+    }
+}
+
+export default withMulti(
+  App,
+  translate,
+  withApi
+);

packages/app-claims/src/secp256k1.d.ts

@@ -0,0 +1,8 @@
+// Copyright 2017-2019 @polkadot/app-123code authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+declare module 'secp256k1/elliptic' {
+  export function publicKeyConvert (publicKey: Buffer, expanded: boolean): Buffer;
+  export function recover (msgHash: Buffer, signature: Buffer, recovery: number): Buffer;
+}

packages/app-claims/src/translate.ts

@@ -0,0 +1,7 @@
+// Copyright 2017-2019 @polkadot/app-123code authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { withTranslation } from 'react-i18next';
+
+export default withTranslation(['sudo', 'ui']);

packages/app-claims/src/util.spec.ts

@@ -0,0 +1,19 @@
+// Copyright 2017-2019 @polkadot/react-components authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { hexToU8a } from '@polkadot/util';
+
+import { publicToAddr } from './util';
+
+describe('publicToAddr', (): void => {
+  it('converts a publicKey to address', (): void => {
+    expect(
+      publicToAddr(
+        hexToU8a(
+          '0x836b35a026743e823a90a0ee3b91bf615c6a757e2b60b9e1dc1826fd0dd16106f7bc1e8179f665015f43c6c81f39062fc2086ed849625c06e04697698b21855e'
+        )
+      )
+    ).toEqual('0x0BED7ABd61247635c1973eB38474A2516eD1D884');
+  });
+});

packages/app-claims/src/util.ts

@@ -0,0 +1,111 @@
+/* eslint-disable @typescript-eslint/camelcase */
+// Copyright 2017-2019 @polkadot/app-123code authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { EthereumAddress, EcdsaSignature } from '@polkadot/types/interfaces';
+
+import secp256k1 from 'secp256k1/elliptic';
+import { createType } from '@polkadot/types';
+import { assert, hexToU8a, stringToU8a, u8aToBuffer, u8aConcat } from '@polkadot/util';
+import { keccakAsHex, keccakAsU8a } from '@polkadot/util-crypto';
+
+interface RecoveredSignature {
+  error: Error | null;
+  ethereumAddress: EthereumAddress | null;
+  signature: EcdsaSignature | null;
+}
+
+interface SignatureParts {
+  recovery: number;
+  signature: Buffer;
+}
+
+// converts an Ethereum address to a checksum representation
+export function addrToChecksum (_address: string): string {
+  const address = _address.toLowerCase();
+  const hash = keccakAsHex(address.substr(2)).substr(2);
+  let result = '0x';
+
+  for (let n = 0; n < 40; n++) {
+    result = `${result}${
+      parseInt(hash[n], 16) > 7
+        ? address[n + 2].toUpperCase()
+        : address[n + 2]
+    }`;
+  }
+
+  return result;
+}
+
+// convert a give public key to an Ethereum address (the last 20 bytes of an _exapnded_ key keccack)
+export function publicToAddr (publicKey: Uint8Array): string {
+  return addrToChecksum(`0x${keccakAsHex(publicKey).slice(-40)}`);
+}
+
+// hash a message for use in signature recovery, adding the standard Ethereum header
+export function hashMessage (message: string): Buffer {
+  const expanded = stringToU8a(`\x19Ethereum Signed Message:\n${message.length.toString()}${message}`);
+  const hashed = keccakAsU8a(expanded);
+
+  return u8aToBuffer(hashed);
+}
+
+// split is 65-byte signature into the r, s (combined) and recovery number (derived from v)
+export function sigToParts (_signature: string): SignatureParts {
+  const signature = hexToU8a(_signature);
+
+  assert(signature.length === 65, `Invalid signature length, expected 65 found ${signature.length}`);
+
+  let v = signature[64];
+
+  if (v < 27) {
+    v += 27;
+  }
+
+  const recovery = v - 27;
+
+  assert(recovery === 0 || recovery === 1, `Invalid signature v value`);
+
+  return {
+    recovery,
+    signature: u8aToBuffer(signature.slice(0, 64))
+  };
+}
+
+// recover an address from a given message and a recover/signature combination
+export function recoverAddress (message: string, { recovery, signature }: SignatureParts): string {
+  const msgHash = hashMessage(message);
+  const senderPubKey = secp256k1.recover(msgHash, signature, recovery);
+
+  return publicToAddr(
+    secp256k1.publicKeyConvert(senderPubKey, false).slice(1)
+  );
+}
+
+// recover an address from a signature JSON (as supplied by e.g. MyCrypto)
+export function recoverFromJSON (signatureJson: string | null): RecoveredSignature {
+  try {
+    const { msg, sig } = JSON.parse(signatureJson || '{}');
+
+    if (!msg || !sig) {
+      throw new Error('Invalid signature object');
+    }
+
+    const parts = sigToParts(sig);
+
+    return {
+      error: null,
+      ethereumAddress: createType('EthereumAddress', recoverAddress(msg, parts)),
+      signature: createType('EcdsaSignature', u8aConcat(parts.signature, new Uint8Array([parts.recovery])))
+    };
+  } catch (error) {
+    console.error(error);
+
+    return {
+      error,
+      ethereumAddress: null,
+      signature: null
+    };
+  }
+}

packages/apps-routing/src/claims.ts

@@ -0,0 +1,23 @@
+// Copyright 2017-2019 @polkadot/apps-routing authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import { Routes } from './types';
+
+import Claims from '@polkadot/app-claims';
+
+export default ([
+  {
+    Component: Claims,
+    display: {
+      needsApi: [
+        'query.claims.claims'
+      ]
+    },
+    i18n: {
+      defaultValue: 'Claim Tokens'
+    },
+    icon: 'star',
+    name: 'claims'
+  }
+] as Routes);

packages/apps-routing/src/index.ts

@@ -9,9 +9,10 @@ import appSettings from '@polkadot/ui-settings';
 import template from './123code';
 import accounts from './accounts';
 import addressbook from './addressbook';
+import claims from './claims';
 import contracts from './contracts';
 import council from './council';
-import dashboard from './dashboard';
+// import dashboard from './dashboard';
 import democracy from './democracy';
 import explorer from './explorer';
 import extrinsics from './extrinsics';
@@ -27,10 +28,11 @@ import treasury from './treasury';
 
 const routes: Routes = appSettings.uiMode === 'light'
   ? ([] as Routes).concat(
-    dashboard,
+    // dashboard,
     explorer,
     accounts,
     addressbook,
+    claims,
     transfer,
     null,
     staking,
@@ -38,14 +40,14 @@ const routes: Routes = appSettings.uiMode === 'light'
     council,
     // TODO Not sure about the inclusion of treasury & parachains here
     null,
-    settings,
-    template
+    settings
   )
   : ([] as Routes).concat(
-    dashboard,
+    // dashboard,
     explorer,
     accounts,
     addressbook,
+    claims,
     transfer,
     null,
     staking,

packages/react-components/src/Card.tsx

@@ -5,17 +5,22 @@
 import React from 'react';
 import styled from 'styled-components';
 
+import { classes } from './util';
+
 interface Props {
   children: React.ReactNode;
   className?: string;
+  isError?: boolean;
+  isSuccess?: boolean;
+  withBottomMargin?: boolean;
 }
 
 class Card extends React.PureComponent<Props> {
   public render (): React.ReactNode {
-    const { children, className } = this.props;
+    const { children, className, isError, isSuccess, withBottomMargin } = this.props;
 
     return (
-      <article className={`ui--Card ${className}`}>
+      <article className={classes('ui--Card', className, (isError && !isSuccess) && 'error', (!isError && isSuccess) && 'success', withBottomMargin && 'withBottomMargin')}>
         {children}
       </article>
     );
@@ -28,6 +33,27 @@ export default styled(Card)`
   min-width: 24%;
   justify-content: space-around;
 
+  &.error {
+    background: rgba(255, 0, 0, 0.05);
+
+    &, h1, h2, h3, h4, h5, h6, p {
+      color: rgba(156, 0, 0) !important;
+    }
+  }
+
+  &.success {
+    border: 1px solid rgb(168, 255, 136);
+    background: rgba(0, 255, 0, 0.05);
+
+    &, h1, h2, h3, h4, h5, h6, p {
+      color: rgba(34, 125, 0) !important;
+    }
+  }
+
+  &.withBottomMargin {
+    margin-bottom: 1.5rem;
+  }
+
   i.help.circle.icon,
   .ui.button.mini,
   .ui.button.tiny,

packages/react-components/src/Collection.tsx

@@ -14,6 +14,7 @@ export interface CollectionProps extends I18nProps {
   headerText?: React.ReactNode;
   isEmpty?: boolean;
   emptyText?: React.ReactNode;
+  showEmptyText?: boolean;
 }
 
 export interface CollectionState {
@@ -78,6 +79,10 @@ export default class Collection<P extends CollectionProps, S extends CollectionS
   protected renderHeader (): React.ReactNode {
     const { buttons, headerText } = this.props;
 
+    if (!headerText) {
+      return null;
+    }
+
     return (
       <div className='ui--Collection-header'>
         <h1>{headerText}</h1>
@@ -91,12 +96,16 @@ export default class Collection<P extends CollectionProps, S extends CollectionS
   }
 
   protected renderEmpty (): React.ReactNode {
-    const { emptyText, t } = this.props;
+    const { emptyText = this.props.t('No items'), showEmptyText = true } = this.props;
+
+    if (!showEmptyText) {
+      return null;
+    }
 
     return (
       <article>
         <div className='ui--Collection-lowercase'>
-          {emptyText || t('No items')}
+          {emptyText}
         </div>
       </article>
     );

packages/react-components/src/Inset.tsx

@@ -14,6 +14,8 @@ export interface InsetProps extends RouteComponentProps {
   className?: string;
   children?: React.ReactNode;
   isCollapsible?: boolean;
+  isError?: boolean;
+  isSuccess?: boolean;
   header?: React.ReactNode;
   href?: string | null;
   withTopMargin?: boolean;
@@ -30,7 +32,7 @@ class Inset extends React.PureComponent<InsetProps, State> {
   };
 
   public render (): React.ReactNode {
-    const { children, className, isCollapsible, header, href, withBottomMargin, withTopMargin } = this.props;
+    const { children, className, isCollapsible, isError, isSuccess, header, href, withBottomMargin, withTopMargin } = this.props;
     const { isCollapsed } = this.state;
 
     if (!children) {
@@ -44,6 +46,8 @@ class Inset extends React.PureComponent<InsetProps, State> {
             'ui--Inset',
             href && 'as-link',
             isCollapsible && 'collapsible',
+            (isError && !isSuccess) && 'error',
+            (!isError && isSuccess) && 'success',
             withBottomMargin && 'bottom-margin',
             withTopMargin && 'top-margin',
             className
@@ -106,6 +110,23 @@ export default withRouter(
         margin-top: 2rem;
       }
 
+      &.error {
+        background: rgba(255, 0, 0, 0.05);
+
+        &, h1, h2, h3, h4, h5, h6, p {
+          color: rgba(156, 0, 0) !important;
+        }
+      }
+
+      &.success {
+        border: 1px solid rgb(168, 255, 136);
+        background: rgba(0, 255, 0, 0.05);
+
+        &, h1, h2, h3, h4, h5, h6, p {
+          color: rgba(34, 125, 0) !important;
+        }
+      }
+
       .header {
         cursor: pointer;
         height: 2rem;

packages/react-components/src/TxModal.tsx

@@ -106,6 +106,8 @@ class TxModal<P extends TxModalProps, S extends TxModalState> extends TxComponen
       });
     }
 
+  protected isUnsigned: () => boolean = (): boolean => false;
+
   protected txMethod: () => string = (): string => '';
 
   protected txParams: () => any[] = (): any[] => [];
@@ -147,7 +149,11 @@ class TxModal<P extends TxModalProps, S extends TxModalState> extends TxComponen
 
     return (
       <TxButton
-        accountId={accountId}
+        {...(
+          this.isUnsigned()
+            ? { isUnsigned: true }
+            : { accountId }
+        )}
         isDisabled={this.isDisabled()}
         isPrimary
         label={this.submitLabel()}

packages/react-components/src/styles/app.css

@@ -29,6 +29,11 @@ h1, h2, h3, h4, h5 {
 
 h1 {
   text-transform: lowercase;
+
+  em {
+    font-style: normal;
+    text-transform: none;
+  }
 }
 
 h3, h4, h5 {

packages/react-signer/src/Modal.tsx

@@ -176,7 +176,7 @@ class Signer extends React.PureComponent<Props, State> {
     const { t } = this.props;
     const { currentItem, isSendable, isV2 } = this.state;
 
-    if (!isV2 || !isSendable || !currentItem) {
+    if (!isV2 || !isSendable || !currentItem || currentItem.isUnsigned) {
       return null;
     }
 

tsconfig.json

@@ -9,6 +9,8 @@
       "@polkadot/app-accounts/*": [ "packages/app-accounts/src/*" ],
       "@polkadot/app-address-book": [ "packages/app-address-book/src" ],
       "@polkadot/app-address-book/*": [ "packages/app-address-book/src/*" ],
+      "@polkadot/app-claims": [ "packages/app-claims/src" ],
+      "@polkadot/app-claims/*": [ "packages/app-claims/src/*" ],
       "@polkadot/app-contracts": [ "packages/app-contracts/src" ],
       "@polkadot/app-contracts/*": [ "packages/app-contracts/src/*" ],
       "@polkadot/app-council": [ "packages/app-council/src" ],