> ## Documentation Index
> Fetch the complete documentation index at: https://docs.spirals.so/llms.txt
> Use this file to discover all available pages before exploring further.
# 📱 Building dApps
> How to integrate Spirals into your web apps, mobile apps, etc.
The following examples use an open-source library of React hooks built for
Ethereum called [Wagmi](https://wagmi.sh/). Please create a new file
`GreenTokenVaultInterface.json` in your project to import the ABI and get
started on these code examples 👇
```json theme={null}
{
"abi": [
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "owner",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "spender",
"type": "address"
},
{
"indexed": false,
"internalType": "uint256",
"name": "value",
"type": "uint256"
}
],
"name": "Approval",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"internalType": "uint256",
"name": "_assetsDeposited",
"type": "uint256"
},
{
"indexed": false,
"internalType": "uint256",
"name": "_sharesMinted",
"type": "uint256"
},
{
"indexed": false,
"internalType": "address",
"name": "_receiver",
"type": "address"
}
],
"name": "Deposit",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "from",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "to",
"type": "address"
},
{
"indexed": false,
"internalType": "uint256",
"name": "value",
"type": "uint256"
}
],
"name": "Transfer",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"internalType": "uint256",
"name": "_amount",
"type": "uint256"
},
{
"indexed": false,
"internalType": "address",
"name": "_owner",
"type": "address"
},
{
"indexed": false,
"internalType": "address",
"name": "_receiver",
"type": "address"
}
],
"name": "WithdrawAsset",
"type": "event"
},
{
"inputs": [
{
"internalType": "address",
"name": "owner",
"type": "address"
},
{
"internalType": "address",
"name": "spender",
"type": "address"
}
],
"name": "allowance",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "spender",
"type": "address"
},
{
"internalType": "uint256",
"name": "amount",
"type": "uint256"
}
],
"name": "approve",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [],
"name": "asset",
"outputs": [
{
"internalType": "contract IERC20Upgradeable",
"name": "",
"type": "address"
}
],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "account",
"type": "address"
}
],
"name": "balanceOf",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "_amountYieldAsset",
"type": "uint256"
}
],
"name": "convertToAsset",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "_amountAsset",
"type": "uint256"
}
],
"name": "convertToYieldAsset",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "decimals",
"outputs": [
{
"internalType": "uint8",
"name": "",
"type": "uint8"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "_amount",
"type": "uint256"
},
{
"internalType": "address",
"name": "_receiver",
"type": "address"
}
],
"name": "deposit",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "_receiver",
"type": "address"
}
],
"name": "depositETH",
"outputs": [],
"stateMutability": "payable",
"type": "function"
},
{
"inputs": [],
"name": "getAPY",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "_address",
"type": "address"
}
],
"name": "getYield",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "name",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "owner",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "paused",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "symbol",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "totalSupply",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "totalYield",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "totalYieldUSD",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "amount",
"type": "uint256"
}
],
"name": "transfer",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "from",
"type": "address"
},
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "amount",
"type": "uint256"
}
],
"name": "transferFrom",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "_amount",
"type": "uint256"
},
{
"internalType": "address",
"name": "_receiver",
"type": "address"
},
{
"internalType": "address",
"name": "_owner",
"type": "address"
}
],
"name": "withdraw",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "_amount",
"type": "uint256"
},
{
"internalType": "address",
"name": "_receiver",
"type": "address"
},
{
"internalType": "address",
"name": "_owner",
"type": "address"
}
],
"name": "withdrawYieldAsset",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "_user",
"type": "address"
}
],
"name": "withdrawals",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
},
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "yieldAsset",
"outputs": [
{
"internalType": "contract IERC20Upgradeable",
"name": "",
"type": "address"
}
],
"stateMutability": "nonpayable",
"type": "function"
}
],
"bytecode": {
"object": "0x",
"sourceMap": "",
"linkReferences": {}
},
"deployedBytecode": {
"object": "0x",
"sourceMap": "",
"linkReferences": {}
},
"methodIdentifiers": {
"allowance(address,address)": "dd62ed3e",
"approve(address,uint256)": "095ea7b3",
"asset()": "38d52e0f",
"balanceOf(address)": "70a08231",
"convertToAsset(uint256)": "4b5a2465",
"convertToYieldAsset(uint256)": "f8d368ee",
"decimals()": "313ce567",
"deposit(uint256,address)": "6e553f65",
"depositETH(address)": "2d2da806",
"getAPY()": "d2cbf7ad",
"getYield(address)": "64c33977",
"name()": "06fdde03",
"owner()": "8da5cb5b",
"paused()": "5c975abb",
"symbol()": "95d89b41",
"totalSupply()": "18160ddd",
"totalYield()": "01418205",
"totalYieldUSD()": "8471c44d",
"transfer(address,uint256)": "a9059cbb",
"transferFrom(address,address,uint256)": "23b872dd",
"withdraw(uint256,address,address)": "b460af94",
"withdrawYieldAsset(uint256,address,address)": "284e7335",
"withdrawals(address)": "7a9262a2",
"yieldAsset()": "095b1837"
},
"rawMetadata": "{\"compiler\":{\"version\":\"0.8.11+commit.d7f03943\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_assetsDeposited\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_sharesMinted\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_receiver\",\"type\":\"address\"}],\"name\":\"Deposit\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"address\",\"name\":\"_receiver\",\"type\":\"address\"}],\"name\":\"WithdrawAsset\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"asset\",\"outputs\":[{\"internalType\":\"contract IERC20Upgradeable\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_amountYieldAsset\",\"type\":\"uint256\"}],\"name\":\"convertToAsset\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_amountAsset\",\"type\":\"uint256\"}],\"name\":\"convertToYieldAsset\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"address\",\"name\":\"_receiver\",\"type\":\"address\"}],\"name\":\"deposit\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_receiver\",\"type\":\"address\"}],\"name\":\"depositETH\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"getAPY\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_address\",\"type\":\"address\"}],\"name\":\"getYield\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"paused\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalYield\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalYieldUSD\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"address\",\"name\":\"_receiver\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"}],\"name\":\"withdraw\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"_amount\",\"type\":\"uint256\"},{\"internalType\":\"address\",\"name\":\"_receiver\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"_owner\",\"type\":\"address\"}],\"name\":\"withdrawYieldAsset\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"_user\",\"type\":\"address\"}],\"name\":\"withdrawals\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"yieldAsset\",\"outputs\":[{\"internalType\":\"contract IERC20Upgradeable\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"allowance(address,address)\":{\"details\":\"Returns the remaining number of tokens that `spender` will be allowed to spend on behalf of `owner` through {transferFrom}. This is zero by default. This value changes when {approve} or {transferFrom} are called.\"},\"approve(address,uint256)\":{\"details\":\"Sets `amount` as the allowance of `spender` over the caller's tokens. Returns a boolean value indicating whether the operation succeeded. IMPORTANT: Beware that changing an allowance with this method brings the risk that someone may use both the old and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 Emits an {Approval} event.\"},\"balanceOf(address)\":{\"details\":\"Returns the amount of tokens owned by `account`.\"},\"decimals()\":{\"details\":\"Returns the decimals places of the token.\"},\"name()\":{\"details\":\"Returns the name of the token.\"},\"symbol()\":{\"details\":\"Returns the symbol of the token.\"},\"totalSupply()\":{\"details\":\"Returns the amount of tokens in existence.\"},\"transfer(address,uint256)\":{\"details\":\"Moves `amount` tokens from the caller's account to `to`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"Moves `amount` tokens from `from` to `to` using the allowance mechanism. `amount` is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. 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"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35788,
"mutability": "mutable",
"name": "",
"nameLocation": "-1:-1:-1",
"nodeType": "VariableDeclaration",
"scope": 35792,
"src": "2029:7:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35787,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2029:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
},
{
"constant": false,
"id": 35790,
"mutability": "mutable",
"name": "",
"nameLocation": "-1:-1:-1",
"nodeType": "VariableDeclaration",
"scope": 35792,
"src": "2038:7:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35789,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2038:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2028:18:76"
},
"scope": 35829,
"stateMutability": "view",
"virtual": false,
"visibility": "external"
},
{
"id": 35797,
"nodeType": "FunctionDefinition",
"src": "2123:54:76",
"nodes": [],
"functionSelector": "01418205",
"implemented": false,
"kind": "function",
"modifiers": [],
"name": "totalYield",
"nameLocation": "2132:10:76",
"parameters": {
"id": 35793,
"nodeType": "ParameterList",
"parameters": [],
"src": "2142:2:76"
},
"returnParameters": {
"id": 35796,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35795,
"mutability": "mutable",
"name": "",
"nameLocation": "-1:-1:-1",
"nodeType": "VariableDeclaration",
"scope": 35797,
"src": "2168:7:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35794,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2168:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2167:9:76"
},
"scope": 35829,
"stateMutability": "view",
"virtual": false,
"visibility": "external"
},
{
"id": 35802,
"nodeType": "FunctionDefinition",
"src": "2258:57:76",
"nodes": [],
"functionSelector": "8471c44d",
"implemented": false,
"kind": "function",
"modifiers": [],
"name": "totalYieldUSD",
"nameLocation": "2267:13:76",
"parameters": {
"id": 35798,
"nodeType": "ParameterList",
"parameters": [],
"src": "2280:2:76"
},
"returnParameters": {
"id": 35801,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35800,
"mutability": "mutable",
"name": "",
"nameLocation": "-1:-1:-1",
"nodeType": "VariableDeclaration",
"scope": 35802,
"src": "2306:7:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35799,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2306:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2305:9:76"
},
"scope": 35829,
"stateMutability": "view",
"virtual": false,
"visibility": "external"
},
{
"id": 35809,
"nodeType": "FunctionDefinition",
"src": "2405:68:76",
"nodes": [],
"functionSelector": "64c33977",
"implemented": false,
"kind": "function",
"modifiers": [],
"name": "getYield",
"nameLocation": "2414:8:76",
"parameters": {
"id": 35805,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35804,
"mutability": "mutable",
"name": "_address",
"nameLocation": "2431:8:76",
"nodeType": "VariableDeclaration",
"scope": 35809,
"src": "2423:16:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_address",
"typeString": "address"
},
"typeName": {
"id": 35803,
"name": "address",
"nodeType": "ElementaryTypeName",
"src": "2423:7:76",
"stateMutability": "nonpayable",
"typeDescriptions": {
"typeIdentifier": "t_address",
"typeString": "address"
}
},
"visibility": "internal"
}
],
"src": "2422:18:76"
},
"returnParameters": {
"id": 35808,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35807,
"mutability": "mutable",
"name": "",
"nameLocation": "-1:-1:-1",
"nodeType": "VariableDeclaration",
"scope": 35809,
"src": "2464:7:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35806,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2464:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2463:9:76"
},
"scope": 35829,
"stateMutability": "view",
"virtual": false,
"visibility": "external"
},
{
"id": 35814,
"nodeType": "FunctionDefinition",
"src": "2550:50:76",
"nodes": [],
"functionSelector": "d2cbf7ad",
"implemented": false,
"kind": "function",
"modifiers": [],
"name": "getAPY",
"nameLocation": "2559:6:76",
"parameters": {
"id": 35810,
"nodeType": "ParameterList",
"parameters": [],
"src": "2565:2:76"
},
"returnParameters": {
"id": 35813,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35812,
"mutability": "mutable",
"name": "",
"nameLocation": "-1:-1:-1",
"nodeType": "VariableDeclaration",
"scope": 35814,
"src": "2591:7:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35811,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2591:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2590:9:76"
},
"scope": 35829,
"stateMutability": "view",
"virtual": false,
"visibility": "external"
},
{
"id": 35821,
"nodeType": "FunctionDefinition",
"src": "2664:107:76",
"nodes": [],
"functionSelector": "4b5a2465",
"implemented": false,
"kind": "function",
"modifiers": [],
"name": "convertToAsset",
"nameLocation": "2673:14:76",
"parameters": {
"id": 35817,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35816,
"mutability": "mutable",
"name": "_amountYieldAsset",
"nameLocation": "2696:17:76",
"nodeType": "VariableDeclaration",
"scope": 35821,
"src": "2688:25:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35815,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2688:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2687:27:76"
},
"returnParameters": {
"id": 35820,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35819,
"mutability": "mutable",
"name": "",
"nameLocation": "-1:-1:-1",
"nodeType": "VariableDeclaration",
"scope": 35821,
"src": "2762:7:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35818,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2762:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2761:9:76"
},
"scope": 35829,
"stateMutability": "view",
"virtual": false,
"visibility": "external"
},
{
"id": 35828,
"nodeType": "FunctionDefinition",
"src": "2835:107:76",
"nodes": [],
"functionSelector": "f8d368ee",
"implemented": false,
"kind": "function",
"modifiers": [],
"name": "convertToYieldAsset",
"nameLocation": "2844:19:76",
"parameters": {
"id": 35824,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35823,
"mutability": "mutable",
"name": "_amountAsset",
"nameLocation": "2872:12:76",
"nodeType": "VariableDeclaration",
"scope": 35828,
"src": "2864:20:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35822,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2864:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2863:22:76"
},
"returnParameters": {
"id": 35827,
"nodeType": "ParameterList",
"parameters": [
{
"constant": false,
"id": 35826,
"mutability": "mutable",
"name": "",
"nameLocation": "-1:-1:-1",
"nodeType": "VariableDeclaration",
"scope": 35828,
"src": "2933:7:76",
"stateVariable": false,
"storageLocation": "default",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
},
"typeName": {
"id": 35825,
"name": "uint256",
"nodeType": "ElementaryTypeName",
"src": "2933:7:76",
"typeDescriptions": {
"typeIdentifier": "t_uint256",
"typeString": "uint256"
}
},
"visibility": "internal"
}
],
"src": "2932:9:76"
},
"scope": 35829,
"stateMutability": "view",
"virtual": false,
"visibility": "external"
}
],
"abstract": false,
"baseContracts": [
{
"baseName": {
"id": 35714,
"name": "IERC20MetadataUpgradeable",
"nodeType": "IdentifierPath",
"referencedDeclaration": 28094,
"src": "468:25:76"
},
"id": 35715,
"nodeType": "InheritanceSpecifier",
"src": "468:25:76"
}
],
"canonicalName": "GreenTokenVaultInterface",
"contractDependencies": [],
"contractKind": "interface",
"fullyImplemented": false,
"linearizedBaseContracts": [
35829,
28094,
27348
],
"name": "GreenTokenVaultInterface",
"nameLocation": "440:24:76",
"scope": 35830,
"usedErrors": []
}
],
"license": "Apache-2.0"
},
"id": 76
}
```
### Depositing into vault
Let's start with a simple example where we render a component that attempts to
deposit 1 token (assuming 18 decimals) to the vault when clicked on.
Note that in order for this to succeed on you must approve the spending amount
first on the ERC-20 token for the vault address as the spender. Use `depositETH`
instead if you are integrating with a native token like ETH or Celo
```ts theme={null}
import { ethers } from "ethers";
import {useAccount, useSigner, useContractWrite, usePrepareContractWrite} from "wagmi";
import ImpactVaultInterface from "~/abis/ImpactVaultInterface.json";
export const MyComponent = () => {
const { address } = useAccount();
const { signer } = useSigner();
const { config: depositConfig } = usePrepareContractWrite({
addressOrName: "",
contractInterface: ImpactVaultInterface.abi,
functionName: "deposit",
signerOrProvider: signer,
args: [ethers.utils.parseEther("1"), address],
});
const { write: deposit } = useContractWrite({
...depositConfig,
onSuccess: async (data: any) => {
console.log("wallet prompt success");
const res = await data.wait();
if (res.status === 1) {
console.log("txn success");
} else {
console.log("txn error");
}
},
onError: error => {
console.log("wallet prompt error");
},
});
return (
Deposit 1 token
);
}
```
### Reading gToken balance
Great! Now we can also read the gToken balance like any other ERC-20 token
contract. Doing this is simple with Wagmi using the `useBalance` hook.
```ts theme={null}
import { ethers } from "ethers";
import {useAccount, useBalance} from "wagmi";
export const MyComponent = () => {
const { address } = useAccount();
const { data: gTokenBalance, refetch: refetchBalance } = useBalance({
addressOrName: address,
token: ""
});
return (
gToken balance {gTokenBalance.formatted}
);
}
```
Let's merge this with the first snippet so that after we deposit we refetch the
user's gToken balance and see it change!
### Putting it together
```ts theme={null}
import { ethers } from "ethers";
import {useAccount, useSigner, useBalance, useContractWrite, usePrepareContractWrite} from "wagmi";
import ImpactVaultInterface from "~/abis/ImpactVaultInterface.json";
export const MyComponent = () => {
const { address } = useAccount();
const { signer } = useSigner();
const { data: gTokenBalance, refetch: refetchBalance } = useBalance({
addressOrName: address,
token: ""
});
console.log(`pre-deposit gToken balance: ${gTokenBalance?.formatted}`);
const { config: depositConfig } = usePrepareContractWrite({
addressOrName: "",
contractInterface: ImpactVaultInterface.abi,
functionName: "deposit",
signerOrProvider: signer,
args: [ethers.utils.parseEther("1"), address],
});
const { write: deposit } = useContractWrite({
...depositConfig,
onSuccess: async (data: any) => {
console.log("wallet prompt success");
const res = await data.wait();
if (res.status === 1) {
console.log("txn success");
await refetchBalance();
console.log(`post-deposit gToken balance: ${gTokenBalance?.formatted}`);
} else {
console.log("txn error");
}
},
onError: error => {
console.log("wallet prompt error");
},
});
return (
Deposit 1 token
gToken balance {gTokenBalance.formatted}
);
}
```
Woo! Now we have a full end-to-end example of a front-end dapp that deposits an
ERC-20 token into the gToken vault and refetches the user's gToken balance 😤