diff --git a/.gitignore b/.gitignore
index 6704566..9fa78db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -102,3 +102,9 @@ dist
 
 # TernJS port file
 .tern-port
+
+.idea/
+
+package-lock.json
+package.json
+git
\ No newline at end of file
diff --git a/Class 1/silent_homework/approve.js b/Class 1/silent_homework/approve.js
new file mode 100644
index 0000000..57fff59
--- /dev/null
+++ b/Class 1/silent_homework/approve.js	
@@ -0,0 +1,23 @@
+module.exports=[{
+    "constant": false,
+    "inputs": [
+    {
+        "name": "guy",
+        "type": "address"
+    },
+    {
+        "name": "wad",
+        "type": "uint256"
+    }
+],
+    "name": "approve",
+    "outputs": [
+    {
+        "name": "",
+        "type": "bool"
+    }
+],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+}]
\ No newline at end of file
diff --git a/Class 1/silent_homework/erc20.js b/Class 1/silent_homework/erc20.js
new file mode 100644
index 0000000..b38a43d
--- /dev/null
+++ b/Class 1/silent_homework/erc20.js	
@@ -0,0 +1,327 @@
+module.exports = [
+    {
+        constant: true,
+        inputs: [],
+        name: 'name',
+        outputs: [{ name: '', type: 'bytes32' }],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [],
+        name: 'stop',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [
+            { name: 'guy', type: 'address' },
+            { name: 'wad', type: 'uint256' }
+        ],
+        name: 'approve',
+        outputs: [{ name: '', type: 'bool' }],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [{ name: 'owner_', type: 'address' }],
+        name: 'setOwner',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: true,
+        inputs: [],
+        name: 'totalSupply',
+        outputs: [{ name: '', type: 'uint256' }],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [
+            { name: 'src', type: 'address' },
+            { name: 'dst', type: 'address' },
+            { name: 'wad', type: 'uint256' }
+        ],
+        name: 'transferFrom',
+        outputs: [{ name: '', type: 'bool' }],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: true,
+        inputs: [],
+        name: 'decimals',
+        outputs: [{ name: '', type: 'uint256' }],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [
+            { name: 'guy', type: 'address' },
+            { name: 'wad', type: 'uint256' }
+        ],
+        name: 'mint',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [{ name: 'wad', type: 'uint256' }],
+        name: 'burn',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [{ name: 'name_', type: 'bytes32' }],
+        name: 'setName',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: true,
+        inputs: [{ name: 'src', type: 'address' }],
+        name: 'balanceOf',
+        outputs: [{ name: '', type: 'uint256' }],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: true,
+        inputs: [],
+        name: 'stopped',
+        outputs: [{ name: '', type: 'bool' }],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [{ name: 'authority_', type: 'address' }],
+        name: 'setAuthority',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: true,
+        inputs: [],
+        name: 'owner',
+        outputs: [{ name: '', type: 'address' }],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: true,
+        inputs: [],
+        name: 'symbol',
+        outputs: [ {"internalType": "string", 
+        "name": "", 
+        "type": "string"}],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [
+            { name: 'guy', type: 'address' },
+            { name: 'wad', type: 'uint256' }
+        ],
+        name: 'burn',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [{ name: 'wad', type: 'uint256' }],
+        name: 'mint',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [
+            { name: 'dst', type: 'address' },
+            { name: 'wad', type: 'uint256' }
+        ],
+        name: 'transfer',
+        outputs: [{ name: '', type: 'bool' }],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [
+            { name: 'dst', type: 'address' },
+            { name: 'wad', type: 'uint256' }
+        ],
+        name: 'push',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [
+            { name: 'src', type: 'address' },
+            { name: 'dst', type: 'address' },
+            { name: 'wad', type: 'uint256' }
+        ],
+        name: 'move',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [],
+        name: 'start',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: true,
+        inputs: [],
+        name: 'authority',
+        outputs: [{ name: '', type: 'address' }],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [{ name: 'guy', type: 'address' }],
+        name: 'approve',
+        outputs: [{ name: '', type: 'bool' }],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        constant: true,
+        inputs: [
+            { name: 'src', type: 'address' },
+            { name: 'guy', type: 'address' }
+        ],
+        name: 'allowance',
+        outputs: [{ name: '', type: 'uint256' }],
+        payable: false,
+        stateMutability: 'view',
+        type: 'function'
+    },
+    {
+        constant: false,
+        inputs: [
+            { name: 'src', type: 'address' },
+            { name: 'wad', type: 'uint256' }
+        ],
+        name: 'pull',
+        outputs: [],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'function'
+    },
+    {
+        inputs: [{ name: 'symbol_', type: 'bytes32' }],
+        payable: false,
+        stateMutability: 'nonpayable',
+        type: 'constructor'
+    },
+    {
+        anonymous: false,
+        inputs: [
+            { indexed: true, name: 'guy', type: 'address' },
+            { indexed: false, name: 'wad', type: 'uint256' }
+        ],
+        name: 'Mint',
+        type: 'event'
+    },
+    {
+        anonymous: false,
+        inputs: [
+            { indexed: true, name: 'guy', type: 'address' },
+            { indexed: false, name: 'wad', type: 'uint256' }
+        ],
+        name: 'Burn',
+        type: 'event'
+    },
+    {
+        anonymous: false,
+        inputs: [{ indexed: true, name: 'authority', type: 'address' }],
+        name: 'LogSetAuthority',
+        type: 'event'
+    },
+    {
+        anonymous: false,
+        inputs: [{ indexed: true, name: 'owner', type: 'address' }],
+        name: 'LogSetOwner',
+        type: 'event'
+    },
+    {
+        anonymous: true,
+        inputs: [
+            { indexed: true, name: 'sig', type: 'bytes4' },
+            { indexed: true, name: 'guy', type: 'address' },
+            { indexed: true, name: 'foo', type: 'bytes32' },
+            { indexed: true, name: 'bar', type: 'bytes32' },
+            { indexed: false, name: 'wad', type: 'uint256' },
+            { indexed: false, name: 'fax', type: 'bytes' }
+        ],
+        name: 'LogNote',
+        type: 'event'
+    },
+    {
+        anonymous: false,
+        inputs: [
+            { indexed: true, name: 'src', type: 'address' },
+            { indexed: true, name: 'guy', type: 'address' },
+            { indexed: false, name: 'wad', type: 'uint256' }
+        ],
+        name: 'Approval',
+        type: 'event'
+    },
+    {
+        anonymous: false,
+        inputs: [
+            { indexed: true, name: 'src', type: 'address' },
+            { indexed: true, name: 'dst', type: 'address' },
+            { indexed: false, name: 'wad', type: 'uint256' }
+        ],
+        name: 'Transfer',
+        type: 'event'
+    }
+];
\ No newline at end of file
diff --git a/Class 1/silent_homework/pancakeabi.js b/Class 1/silent_homework/pancakeabi.js
new file mode 100644
index 0000000..968e9ab
--- /dev/null
+++ b/Class 1/silent_homework/pancakeabi.js	
@@ -0,0 +1,983 @@
+module.exports=[
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "_factory",
+                "type": "address"
+            },
+            {
+                "internalType": "address",
+                "name": "_WETH",
+                "type": "address"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "constructor"
+    },
+    {
+        "inputs": [
+
+        ],
+        "name": "WETH",
+        "outputs": [
+            {
+                "internalType": "address",
+                "name": "",
+                "type": "address"
+            }
+        ],
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "tokenA",
+                "type": "address"
+            },
+            {
+                "internalType": "address",
+                "name": "tokenB",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountADesired",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountBDesired",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountAMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountBMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "addLiquidity",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountA",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountB",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "liquidity",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "token",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountTokenDesired",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountTokenMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountETHMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "addLiquidityETH",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountToken",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountETH",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "liquidity",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "payable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+
+        ],
+        "name": "factory",
+        "outputs": [
+            {
+                "internalType": "address",
+                "name": "",
+                "type": "address"
+            }
+        ],
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountOut",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "reserveIn",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "reserveOut",
+                "type": "uint256"
+            }
+        ],
+        "name": "getAmountIn",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountIn",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "pure",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountIn",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "reserveIn",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "reserveOut",
+                "type": "uint256"
+            }
+        ],
+        "name": "getAmountOut",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountOut",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "pure",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountOut",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            }
+        ],
+        "name": "getAmountsIn",
+        "outputs": [
+            {
+                "internalType": "uint256[]",
+                "name": "amounts",
+                "type": "uint256[]"
+            }
+        ],
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountIn",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            }
+        ],
+        "name": "getAmountsOut",
+        "outputs": [
+            {
+                "internalType": "uint256[]",
+                "name": "amounts",
+                "type": "uint256[]"
+            }
+        ],
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountA",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "reserveA",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "reserveB",
+                "type": "uint256"
+            }
+        ],
+        "name": "quote",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountB",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "pure",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "tokenA",
+                "type": "address"
+            },
+            {
+                "internalType": "address",
+                "name": "tokenB",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "liquidity",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountAMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountBMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "removeLiquidity",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountA",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountB",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "token",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "liquidity",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountTokenMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountETHMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "removeLiquidityETH",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountToken",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountETH",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "token",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "liquidity",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountTokenMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountETHMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "removeLiquidityETHSupportingFeeOnTransferTokens",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountETH",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "token",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "liquidity",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountTokenMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountETHMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            },
+            {
+                "internalType": "bool",
+                "name": "approveMax",
+                "type": "bool"
+            },
+            {
+                "internalType": "uint8",
+                "name": "v",
+                "type": "uint8"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "r",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "s",
+                "type": "bytes32"
+            }
+        ],
+        "name": "removeLiquidityETHWithPermit",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountToken",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountETH",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "token",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "liquidity",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountTokenMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountETHMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            },
+            {
+                "internalType": "bool",
+                "name": "approveMax",
+                "type": "bool"
+            },
+            {
+                "internalType": "uint8",
+                "name": "v",
+                "type": "uint8"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "r",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "s",
+                "type": "bytes32"
+            }
+        ],
+        "name": "removeLiquidityETHWithPermitSupportingFeeOnTransferTokens",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountETH",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "address",
+                "name": "tokenA",
+                "type": "address"
+            },
+            {
+                "internalType": "address",
+                "name": "tokenB",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "liquidity",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountAMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountBMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            },
+            {
+                "internalType": "bool",
+                "name": "approveMax",
+                "type": "bool"
+            },
+            {
+                "internalType": "uint8",
+                "name": "v",
+                "type": "uint8"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "r",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "s",
+                "type": "bytes32"
+            }
+        ],
+        "name": "removeLiquidityWithPermit",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountA",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountB",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountOut",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapETHForExactTokens",
+        "outputs": [
+            {
+                "internalType": "uint256[]",
+                "name": "amounts",
+                "type": "uint256[]"
+            }
+        ],
+        "stateMutability": "payable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountOutMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapExactETHForTokens",
+        "outputs": [
+            {
+                "internalType": "uint256[]",
+                "name": "amounts",
+                "type": "uint256[]"
+            }
+        ],
+        "stateMutability": "payable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountOutMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapExactETHForTokensSupportingFeeOnTransferTokens",
+        "outputs": [
+
+        ],
+        "stateMutability": "payable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountIn",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountOutMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapExactTokensForETH",
+        "outputs": [
+            {
+                "internalType": "uint256[]",
+                "name": "amounts",
+                "type": "uint256[]"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountIn",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountOutMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapExactTokensForETHSupportingFeeOnTransferTokens",
+        "outputs": [
+
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountIn",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountOutMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapExactTokensForTokens",
+        "outputs": [
+            {
+                "internalType": "uint256[]",
+                "name": "amounts",
+                "type": "uint256[]"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountIn",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountOutMin",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapExactTokensForTokensSupportingFeeOnTransferTokens",
+        "outputs": [
+
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountOut",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountInMax",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapTokensForExactETH",
+        "outputs": [
+            {
+                "internalType": "uint256[]",
+                "name": "amounts",
+                "type": "uint256[]"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "uint256",
+                "name": "amountOut",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amountInMax",
+                "type": "uint256"
+            },
+            {
+                "internalType": "address[]",
+                "name": "path",
+                "type": "address[]"
+            },
+            {
+                "internalType": "address",
+                "name": "to",
+                "type": "address"
+            },
+            {
+                "internalType": "uint256",
+                "name": "deadline",
+                "type": "uint256"
+            }
+        ],
+        "name": "swapTokensForExactTokens",
+        "outputs": [
+            {
+                "internalType": "uint256[]",
+                "name": "amounts",
+                "type": "uint256[]"
+            }
+        ],
+        "stateMutability": "nonpayable",
+        "type": "function"
+    },
+    {
+        "stateMutability": "payable",
+        "type": "receive"
+    }
+]
\ No newline at end of file
diff --git a/Class 1/silent_homework/read.js b/Class 1/silent_homework/read.js
new file mode 100644
index 0000000..89d46fc
--- /dev/null
+++ b/Class 1/silent_homework/read.js	
@@ -0,0 +1,44 @@
+var Web3 = require('web3');
+
+//创建 rpc 连接字符串
+var rpcstring = 'https://bsc-dataseed1.binance.org/'
+//创建ws连接字符串
+var wstring = 'wss://bsc-ws-node.nariox.org:443';
+var wscweb3 = new Web3(new Web3.providers.WebsocketProvider(wstring));
+var rpcweb3 = new Web3(new Web3.providers.HttpProvider(rpcstring));
+web3 = rpcweb3;
+var address="0x512aaD1d0E1492a9C4075aBa58cE1a944A74f973"
+
+const getBNBBalance = async (address) => {
+    let result = await web3.eth.getBalance(address)
+    let balance=web3.utils.fromWei(result.toString(),"ether")
+    console.log("地址" + address + "有" + balance + "个BNB");
+    return balance;
+}
+
+const erc20 = require('./erc20.js')
+const getTokenBalance = async (tokenaddress, address) => {
+    //创建代币的智能合约函数
+    var tokenContract = new web3.eth.Contract(erc20, tokenaddress);
+
+    //调用代币的智能合约获取余额功能
+    let result = await tokenContract.methods.balanceOf(address).call();
+    //获得代币有多少位小数
+    let decimals = await tokenContract.methods.decimals().call();
+    let tokenbalance = web3.utils.fromWei(result.toString(10), "ether");
+
+    //获得代币的符号
+    let symbol = await tokenContract.methods.symbol().call();
+
+    //打印结果
+    console.log("地址" + address + "代币:" + symbol + "的数量是:" + tokenbalance);
+    return tokenbalance;
+}
+
+getBNBBalance(address);
+var tentokenaddress=new Array("0x0eb3a705fc54725037cc9e008bdede697f62f335","0xd2ff8c018a22ff06f4be781090579d0490b9a69f","0x9e3a9F1612028eeE48F85cA85f8Bed2f37d76848","0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c","0xc66e4de0d9b4f3cb3f271c37991fe62f154471eb","0x3fcca8648651e5b974dd6d3e50f61567779772a8","0xb16600c510b0f323dee2cb212924d90e58864421","0x5ece3f1542c4e1a06767457e4d8286bea772fc41","0x5190b01965b6e3d786706fd4a999978626c19880","0xc409ec8a33f31437ed753c82eed3c5f16d6d7e22");
+
+for(let i in tentokenaddress){
+    getTokenBalance(tentokenaddress[i],address);
+}
+
diff --git a/Class 1/silent_homework/swap.js b/Class 1/silent_homework/swap.js
new file mode 100644
index 0000000..55998bf
--- /dev/null
+++ b/Class 1/silent_homework/swap.js	
@@ -0,0 +1,131 @@
+var Web3 = require('web3');
+var EthereumTx = require('ethereumjs-tx').Transaction;
+const util = require('ethereumjs-util')
+const ethereumjs_common = require ('ethereumjs-common').default;
+
+var BSC_MAIN = ethereumjs_common.forCustomChain ('mainnet', { networkId: 56, chainId: 56, name: 'bnb' }, 'petersburg');
+
+
+//创建 rpc 连接字符串
+var rpcstring = 'https://bsc-dataseed1.binance.org/'
+//创建ws连接字符串
+var wstring = 'wss://bsc-ws-node.nariox.org:443';
+var wscweb3 = new Web3(new Web3.providers.WebsocketProvider(wstring));
+var rpcweb3 = new Web3(new Web3.providers.HttpProvider(rpcstring));
+var web3 = rpcweb3;
+
+function getPriKey(prikeystring) {
+    const privKey =Buffer.from(prikeystring, "hex");
+    return privKey;
+}
+
+//这里是将交易用私钥签名部分
+function getEthRawTx(fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit) {
+
+    var rawTransaction = {
+        from: fromAddress,
+        nonce: web3.utils.toHex(nonceNum),
+        gasLimit: web3.utils.toHex(gaslimit),
+        gasPrice: web3.utils.toHex(gasPrice),
+        to: toAddress,
+        value: web3.utils.toHex(nbnb),
+        data: web3.utils.toHex(input),
+    };
+    const tx = new EthereumTx(rawTransaction,{common: BSC_MAIN});
+    tx.sign(privKey);
+    const serializedTx = tx.serialize();
+    return serializedTx;
+}
+
+//将签名的内容发送到区块链网络中
+const signTransaction = async (fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit) => {
+    var serializedTx = getEthRawTx(fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit)
+    // Comment out these three lines if you don't really want to send the TX right now
+    console.log(`Attempting to send signed tx:  ${serializedTx.toString('hex')}`);
+    var receipt = await web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'));
+    console.log(`Receipt info:  ${JSON.stringify(receipt, null, '\t')}`);
+    if (receipt.status == true) {
+        return true;
+    }
+    return false;
+}
+
+const sendtx = async (prikeystring,contractaddress,value,input) => {
+    var priKey = getPriKey(prikeystring);
+    //获得自己的地址
+    var fromAddress = "0x" + util.privateToAddress(priKey).toString('hex');
+    value = web3.utils.toWei((value).toString(10), 'ether');
+    //设置gasprice 为 5G wei
+    var gasPrice = web3.utils.toWei((5).toString(10), 'Gwei');
+    //设置 gaslimit 为 420000
+    var gaslimit = 420000
+    console.log("从该地址发送：" + fromAddress)
+    //获得下一次交易的数
+    var nonceCnt = await web3.eth.getTransactionCount(fromAddress);
+    let result = await signTransaction(fromAddress, contractaddress, input, nonceCnt, priKey, gasPrice, value, gaslimit)
+    if (result) {
+        console.log("发送成功")
+    }
+    else {
+        console.log("发送失败")
+    }
+}
+
+const pancakeabi = require('./pancakeabi.js')
+const moment = require("moment");
+function swapETHForExactTokensinput(abi,bnbnum,tokenaddress,initialrate,slippage,delaymin,accountaddress){
+    var wbnbadddress="0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c"
+    var path = [wbnbadddress,tokenaddress];
+    var amountOut= (bnbnum*(100 - slippage) / 100 * initialrate).toFixed(12);
+    var amountOutMin = web3.utils.toWei(amountOut.toString(10), "ether");
+    var moment = require('moment');
+    const now = moment().unix();
+    const DEADLINE = now + 60 * delaymin;
+    var deadline = (DEADLINE).toString(10);
+    var input = web3.eth.abi.encodeFunctionCall(abi[17],[amountOutMin,path,accountaddress,deadline]);
+    return input;
+}
+
+function approvetokeninput(contractaddress,num){
+    const approve=require('./approve.js')
+    approvenum = web3.utils.toWei(num.toString(10), "ether");
+    var input = web3.eth.abi.encodeFunctionCall(approve[0],[contractaddress,approvenum]);
+    return input;
+}
+
+function approvetoken(prikeystring,tokencontractaddress,num,contractyouwanttoapprove){
+    sendtx(prikeystring,tokencontractaddress,0,approvetokeninput(contractyouwanttoapprove,num))
+}
+
+function swapETHForExactTokens(prikeystring,routeraddress,abi,bnbnum,tokenaddress,initialrate,slippage,delaymin,toaddress){
+    const input=swapETHForExactTokensinput(abi,bnbnum,tokenaddress,initialrate,slippage,delaymin,toaddress)
+    sendtx(prikeystring,routeraddress,bnbnum,input)
+}
+
+function swapExactTokensForTokensinput(abi,tokenAnum,tokenA_address,tokenB_address,initialrate,slippage,delaymin,accountaddress){
+    var amountIn=web3.utils.toWei(tokenAnum.toString(10), "ether");
+    var amountOut=(tokenAnum*(100 - slippage) / 100 * initialrate).toFixed(12);
+    var amountOutMin = web3.utils.toWei(amountOut.toString(10), "ether");
+    var path = [tokenA_address,tokenB_address];
+    var moment = require('moment');
+    const now = moment().unix();
+    const DEADLINE = now + 60 * delaymin;
+    var deadline = (DEADLINE).toString(10);
+    var input = web3.eth.abi.encodeFunctionCall(abi[21],[amountIn,amountOutMin,path,accountaddress,deadline]);
+    return input;
+}
+
+function swapExactTokensForTokens(prikeystring,routeraddress,abi,tokenAnum,tokenA_address,tokenB_address,initialrate,slippage,delaymin,toaddress){
+    sendtx(prikeystring,routeraddress,0,swapExactTokensForTokensinput(abi,tokenAnum,tokenA_address,tokenB_address,initialrate,slippage,delaymin,toaddress))
+}
+
+var prikeystring="";
+var toAddress="0x0000158a8A7419a291187d20e47f748a5eA1824C";
+var atomaddress="0x0eb3a705fc54725037cc9e008bdede697f62f335";
+var pancakerouter="0x10ed43c718714eb63d5aa57b78b54704e256024e";
+var wbnbaddress="0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c";
+
+
+swapETHForExactTokens(prikeystring,pancakerouter,pancakeabi,0.0001,atomaddress,14.39,1,10,toAddress)
+approvetoken(prikeystring,atomaddress,1,pancakerouter)
+swapExactTokensForTokens(prikeystring,pancakerouter, pancakeabi,0.002,atomaddress,wbnbaddress,0.0691,1,10,toAddress)
\ No newline at end of file
diff --git a/Class 1/silent_homework/transfer.js b/Class 1/silent_homework/transfer.js
new file mode 100644
index 0000000..cf63d81
--- /dev/null
+++ b/Class 1/silent_homework/transfer.js	
@@ -0,0 +1,112 @@
+var Web3 = require('web3');
+var EthereumTx = require('ethereumjs-tx').Transaction;
+const util = require('ethereumjs-util')
+const ethereumjs_common = require ('ethereumjs-common').default;
+
+var BSC_MAIN = ethereumjs_common.forCustomChain ('mainnet', { networkId: 56, chainId: 56, name: 'bnb' }, 'petersburg');
+
+
+//创建 rpc 连接字符串
+var rpcstring = 'https://bsc-dataseed1.binance.org/'
+//创建ws连接字符串
+var wstring = 'wss://bsc-ws-node.nariox.org:443';
+var wscweb3 = new Web3(new Web3.providers.WebsocketProvider(wstring));
+var rpcweb3 = new Web3(new Web3.providers.HttpProvider(rpcstring));
+var web3 = rpcweb3;
+
+function getPriKey(prikeystring) {
+    const privKey =Buffer.from(prikeystring, "hex");
+    return privKey;
+}
+
+//这里是将交易用私钥签名部分
+function getEthRawTx(fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit) {
+
+    var rawTransaction = {
+        from: fromAddress,
+        nonce: web3.utils.toHex(nonceNum),
+        gasLimit: web3.utils.toHex(gaslimit),
+        gasPrice: web3.utils.toHex(gasPrice),
+        to: toAddress,
+        value: web3.utils.toHex(nbnb),
+        data: web3.utils.toHex(input),
+    };
+    const tx = new EthereumTx(rawTransaction,{common: BSC_MAIN});
+    tx.sign(privKey);
+    const serializedTx = tx.serialize();
+    return serializedTx;
+}
+
+//将签名的内容发送到区块链网络中
+const signTransaction = async (fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit) => {
+    var serializedTx = getEthRawTx(fromAddress, toAddress, input, nonceNum, privKey, gasPrice, nbnb, gaslimit)
+    // Comment out these three lines if you don't really want to send the TX right now
+    console.log(`Attempting to send signed tx:  ${serializedTx.toString('hex')}`);
+    var receipt = await web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'));
+    console.log(`Receipt info:  ${JSON.stringify(receipt, null, '\t')}`);
+    if (receipt.status == true) {
+        return true;
+    }
+    return false;
+}
+
+
+
+const sendbnb = async (prikeystring,toAddress,nsendBNB) => {
+    var priKey = getPriKey(prikeystring);
+    //获得自己的地址
+    var fromAddress = "0x" + util.privateToAddress(priKey).toString('hex');
+    var nbnb = web3.utils.toWei((nsendBNB).toString(10), 'ether');
+    //设置gasprice 为 5G wei
+    var gasPrice = web3.utils.toWei((5).toString(10), 'Gwei');
+    //设置 gaslimit 为 420000
+    var gaslimit = 420000
+    //没有调用智能合约，将input设置为空
+    var input = ""
+    //获得下一次交易的数
+    console.log("从该地址发送：" + fromAddress)
+    var nonceCnt = await web3.eth.getTransactionCount(fromAddress);
+    let result = await signTransaction(fromAddress, toAddress, input, nonceCnt, priKey, gasPrice, nbnb, gaslimit)
+   if (result) {
+        console.log("发送成功")
+    }
+    else {
+        console.log("发送失败")
+    }
+}
+const transferabi=require('./transferabi.js')
+
+function transfertokeninput (num,toaddress){
+    var weinum= web3.utils.toWei(num.toString(), "ether");
+    var input = web3.eth.abi.encodeFunctionCall(transferabi[0],[toaddress,weinum]);
+    return input;
+}
+
+const sendtx = async (prikeystring,contractaddress,value,input) => {
+    var priKey = getPriKey(prikeystring);
+    //获得自己的地址
+    var fromAddress = "0x" + util.privateToAddress(priKey).toString('hex');
+    value = web3.utils.toWei((value).toString(10), 'ether');
+    //设置gasprice 为 5G wei
+    var gasPrice = web3.utils.toWei((5).toString(10), 'Gwei');
+    //设置 gaslimit 为 420000
+    var gaslimit = 420000
+    console.log("从该地址发送：" + fromAddress)
+    //获得下一次交易的数
+    var nonceCnt = await web3.eth.getTransactionCount(fromAddress);
+    let result = await signTransaction(fromAddress, contractaddress, input, nonceCnt, priKey, gasPrice, value, gaslimit)
+    if (result) {
+        console.log("发送成功")
+    }
+    else {
+        console.log("发送失败")
+    }
+}
+function sendcustomtoken(prikeystring,tokencontractaddress,num,toAddress){
+    sendtx(prikeystring,tokencontractaddress,0,transfertokeninput(num,toAddress));
+}
+var prikeystring="";
+var toAddress="0x512aaD1d0E1492a9C4075aBa58cE1a944A74f973";
+var wbnbAddress="0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c"
+sendbnb(prikeystring,toAddress,0.001);
+sendcustomtoken(prikeystring,wbnbAddress,0.01,toAddress)
diff --git a/Class 1/silent_homework/transferabi.js b/Class 1/silent_homework/transferabi.js
new file mode 100644
index 0000000..02ebdee
--- /dev/null
+++ b/Class 1/silent_homework/transferabi.js	
@@ -0,0 +1,25 @@
+module.exports=[
+    {
+        "constant": false,
+        "inputs": [
+            {
+                "name": "dst",
+                "type": "address"
+            },
+            {
+                "name": "wad",
+                "type": "uint256"
+            }
+        ],
+        "name": "transfer",
+        "outputs": [
+            {
+                "name": "",
+                "type": "bool"
+            }
+        ],
+        "payable": false,
+        "stateMutability": "nonpayable",
+        "type": "function"
+    }
+]
\ No newline at end of file
diff --git a/Class 1/source/test.js b/Class 1/source/test.js
index b25f5bc..ffbc34d 100644
--- a/Class 1/source/test.js	
+++ b/Class 1/source/test.js	
@@ -184,7 +184,7 @@ const send = async () => {
 
 
 
-const pancake = require('./pancake.js')
+const pancake = require('./pancakeabi.js')
 
 //获取input内容
 function swaptokeninput(wbnbadddress, toaddress, tokenamountIn, amountOut, tokenaddress, tokendecimals = 18,) {