use simple repo

src/types/Coin.ts

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+export interface Coin {
+    amount: string|number;
+    denom: string;
+}

src/types/Proposal.ts

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+export class Proposal {
+    type: string = '';
+    title: string = '';
+    description: string = ''
+}

src/types/index.ts

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+export * from './Coin'
+export * from './Proposal'