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 +1,44 @@
+import { StrKey, Contract } from '@stellar/stellar-sdk'
+import { Server } from '@stellar/stellar-sdk/rpc'
+
+/**
+ * Generates a contract client for interacting with a Stellar smart contract
+ * @param {string} contractId - The contract ID to validate and connect to
+ * @returns {Promise<Contract>} A Contract instance
+ */
+export async function generateContractClient(contractId) {
+    const server = new Server('https://soroban-testnet.stellar.org')
+
+    // Validate contract ID
+    if (!StrKey.isValidContract(contractId)) {
+        throw new Error('Invalid contract ID format')
+    }
+
+    try {
+        console.log('Fetching WASM for contract ID:', contractId)
+
+        // Fetch the contract's WASM using the contract ID
+        const contractResponse = await server.getContractWasmByContractId(contractId)
+
+        // Log the WASM bytecode length or the data for debugging
+        console.log('Contract WASM length:', contractResponse.length) // Adjust if needed based on actual response structure
+
+        // Create a contract instance (you may need to initialize this differently based on your library's requirements)
+        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 // Return the contract instance
+    } catch (serverError) {
+        console.error('Error fetching contract WASM:', serverError)
+
+        // Handle specific server error responses
+        if (serverError.response && serverError.response.status === 404) {
+            throw new Error(`Contract not found: ${contractId}`)
+        }
+
+        // Throw a general error for other server issues
+        throw new Error(`Failed to fetch contract WASM: ${serverError.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 +1,91 @@
+<script lang="ts">
+    import { contractStore } from '$lib/stores/contractStore'
+    import { generateContractClient } from '$lib/utils/contractUtils'
+    import { SorobanRpc } from '@stellar/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="mb-4 text-2xl font-bold">Stellar Smart Contract Interaction</h1>
+
+    <div class="mb-4">
+        <label class="mb-1 block text-sm font-medium" for="contractId"> Contract ID </label>
+        <input
+            id="contractId"
+            type="text"
+            bind:value={contractId}
+            placeholder="Enter contract ID (C...)"
+            class="w-full rounded border p-2"
+        />
+    </div>
+
+    <div class="mb-4">
+        <label class="mb-1 block text-sm font-medium" for="contractName">
+            Contract Name (optional)
+        </label>
+        <input
+            id="contractName"
+            type="text"
+            bind:value={contractName}
+            placeholder="Enter a name for this contract"
+            class="w-full rounded border p-2"
+        />
+    </div>
+
+    <button
+        on:click={handleLoadContract}
+        disabled={loading}
+        class="rounded bg-blue-500 px-4 py-2 text-white"
+    >
+        {loading ? 'Loading...' : 'Load Contract'}
+    </button>
+
+    {#if error}
+        <div class="mt-2 text-red-500">{error}</div>
+    {/if}
+
+    <h2 class="mb-4 mt-8 text-xl font-bold">Saved Contracts</h2>
+    {#each $contractStore.savedContracts as contract}
+        <div class="mb-2 flex items-center justify-between rounded border p-4">
+            <div>
+                <span class="font-medium">{contract.name || 'Unnamed Contract'}</span>
+                <span class="block text-sm text-gray-500">{contract.id}</span>
+            </div>
+            <button
+                on:click={() => (contractId = contract.id)}
+                class="rounded bg-gray-200 px-3 py-1"
+            >
+                Load
+            </button>
+        </div>
+    {/each}
+</div>