stellar smart contract

src/lib/stores/contractStore.js

@@ -0,0 +1,85 @@
+import { persisted } from 'svelte-local-storage-store'
+import { v4 as uuidv4 } from 'uuid'
+import { Contract, StrKey } from '@stellar/stellar-sdk'
+import { error } from '@sveltejs/kit'
+import { get } from 'svelte/store'
+
+/**
+ * @typedef {Object} SavedContract
+ * @property {string} id Unique identifier for this contract
+ * @property {string} contractId The Stellar contract ID
+ * @property {string} name Human-readable name for this contract
+ * @property {string} [description] Optional description of the contract
+ */
+
+function createContractStore() {
+ /** @type {import('svelte/store').Writable<{savedContracts: SavedContract[], currentContract: SavedContract|null}>} */
+ const { subscribe, set, update } = persisted('bpa:contractStore', {
+ savedContracts: [],
+ currentContract: null
+ })
+
+ return {
+ subscribe,
+
+ /**
+ * Saves a new contract to the store
+ * @param {SavedContract} contract Contract details to save
+ * @throws Will throw an error if the contract ID is invalid
+ */
+ saveContract: (contract) => 
+ update(store => {
+ if (!StrKey.isValidContract(contract.contractId)) {
+ throw error(400, { message: 'Invalid contract ID' })
+ }
+
+ const newContract = {
+ ...contract,
+ id: contract.id || uuidv4()
+ }
+
+ return {
+ ...store,
+ savedContracts: [...store.savedContracts, newContract]
+ }
+ }),
+
+ /**
+ * Removes a contract from the store
+ * @param {string} id Unique identifier of the contract to remove
+ */
+ removeContract: (id) => 
+ update(store => ({
+ ...store,
+ savedContracts: store.savedContracts.filter(c => c.id !== id),
+ currentContract: store.currentContract?.id === id ? null : store.currentContract
+ })),
+
+ /**
+ * Sets the current active contract
+ * @param {SavedContract|null} contract Contract to set as current, or null to clear
+ */
+ setCurrentContract: (contract) => 
+ update(store => ({
+ ...store,
+ currentContract: contract
+ })),
+
+ /**
+ * Looks up a contract by its Stellar contract ID
+ * @param {string} contractId Stellar contract ID to look up
+ * @returns {SavedContract|undefined} The found contract or undefined
+ */
+ lookup: (contractId) => {
+ const store = get(contractStore)
+ return store.savedContracts.find(contract => contract.contractId === contractId)
+ },
+
+ /**
+ * Clears all saved contracts from the store
+ */
+ empty: () => set({ savedContracts: [], currentContract: null })
+ }
+}
+
+export const contractStore = createContractStore()

src/lib/utils/contractUtils.js

@@ -0,0 +1,38 @@
+import { StrKey } from 'stellar-sdk';
+import { Contract } from '@stellar/stellar-sdk';
+
+/**
+ * Generates a contract client for interacting with a Stellar smart contract
+ * @param {string} contractId - The contract ID to validate and connect to
+ * @param {Server} server - Stellar SDK Server instance
+ * @returns {Promise<Contract>} A Contract instance
+ */
+export async function generateContractClient(contractId, server) {
+ try {
+ // Validate contract ID
+ if (!StrKey.isValidContract(contractId)) {
+ throw new Error('Invalid contract ID format');
+ }
+
+ try {
+ // Get the contract's WASM using the correct method
+ const contractResponse = await server.getContractWasmByContractId(contractId);
+
+ // Create contract instance
+ const contract = new Contract(contractId);
+
+ // You might want to add the contract's interface here
+ // This could involve parsing the WASM to get available methods
+
+ return contract;
+ } catch (serverError) {
+ if (serverError.response && serverError.response.status === 404) {
+ throw new Error(`Contract not found: ${contractId}`);
+ }
+ throw serverError;
+ }
+ } catch (error) {
+ console.error('Error generating contract client:', error);
+ throw new Error(`Failed to generate contract client: ${error.message}`);
+ }
+}

src/routes/dashboard/components/SidebarMenu.svelte

@@ -17,6 +17,7 @@ list of menu links that can be used to navigate throughout the dashboard.
  { route: '/dashboard/assets', text: 'Assets' },
  { route: '/dashboard/contacts', text: 'Contacts' },
  { route: '/dashboard/transfers', text: 'Transfers' },
+ { route: '/dashboard/contracts', text: 'Smart Contracts' }
  ]
 </script>
 

src/routes/dashboard/contracts/+page.svelte

@@ -0,0 +1,93 @@
+<script lang="ts">
+ import { contractStore } from '$lib/stores/contractStore';
+ import { generateContractClient } from '$lib/utils/contractUtils';
+ import SorobanRpc from 'stellar-sdk';
+
+ let contractId = '';
+ let contractName = '';
+ let error = '';
+ let loading = false;
+
+ const server = new SorobanRpc.Server('https://soroban-testnet.stellar.org');
+
+ async function handleLoadContract() {
+ loading = true;
+ error = '';
+
+ try {
+ const contract = await generateContractClient(contractId, server);
+ $contractStore.setCurrentContract(contract);
+
+ // Optionally save the contract
+ if (contractName) {
+ $contractStore.saveContract({
+ id: contractId,
+ name: contractName,
+ network: 'TESTNET' // or 'PUBLIC' for mainnet
+ });
+ }
+ } catch (err) {
+ error = err.message;
+ } finally {
+ loading = false;
+ }
+ }
+</script>
+
+<div class="container mx-auto p-4">
+ <h1 class="text-2xl font-bold mb-4">Stellar Smart Contract Interaction</h1>
+
+ <div class="mb-4">
+ <label class="block text-sm font-medium mb-1" for="contractId">
+ Contract ID
+ </label>
+ <input
+ id="contractId"
+ type="text"
+ bind:value={contractId}
+ placeholder="Enter contract ID (C...)"
+ class="w-full p-2 border rounded"
+ />
+ </div>
+
+ <div class="mb-4">
+ <label class="block text-sm font-medium mb-1" for="contractName">
+ Contract Name (optional)
+ </label>
+ <input
+ id="contractName"
+ type="text"
+ bind:value={contractName}
+ placeholder="Enter a name for this contract"
+ class="w-full p-2 border rounded"
+ />
+ </div>
+
+ <button
+ on:click={handleLoadContract}
+ disabled={loading}
+ class="bg-blue-500 text-white px-4 py-2 rounded"
+ >
+ {loading ? 'Loading...' : 'Load Contract'}
+ </button>
+
+ {#if error}
+ <div class="text-red-500 mt-2">{error}</div>
+ {/if}
+
+ <h2 class="text-xl font-bold mt-8 mb-4">Saved Contracts</h2>
+ {#each $contractStore.savedContracts as contract}
+ <div class="border p-4 rounded mb-2 flex justify-between items-center">
+ <div>
+ <span class="font-medium">{contract.name || 'Unnamed Contract'}</span>
+ <span class="text-sm text-gray-500 block">{contract.id}</span>
+ </div>
+ <button
+ on:click={() => contractId = contract.id}
+ class="bg-gray-200 px-3 py-1 rounded"
+ >
+ Load
+ </button>
+ </div>
+ {/each}
+</div>