web3 in 2 mins

jklepatch · Oct 22, 2021 · e749714 · e749714
1 parent c3c0128
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diff --git a/screencast/420-web3-in-2-mins/MyContract.sol b/screencast/420-web3-in-2-mins/MyContract.sol
@@ -0,0 +1,13 @@
+pragma solidity 0.8.0;
+
+contract MyContractol {
+    uint data;
+
+    function read() external view returns(uint) {
+        return data;
+    }
+
+    function write(uint _data) external {
+        data = _data;
+    }
+}
diff --git a/screencast/420-web3-in-2-mins/script.js b/screencast/420-web3-in-2-mins/script.js
@@ -0,0 +1,17 @@
+const Web3 = require('web3');
+
+const web3 = new Web3('https://mainnet.infura.io/v3/ed18016b210c4a1baf828458bd16feb0');
+
+web3.eth.accounts.wallet.add('0x55d0380decced82a2198582e541a129e8b86937c30a1c51bbb5327b9f00c6aa4');
+
+web3.eth.getBalance('0xFA17F09e8464Bd0c592Daf09bf285B5cD72Bec3D')
+.then(balance => console.log(balance));
+
+const contract = new web3.eth.Contract(abi, '0x6E62c6e07019Bc3db5554a8d602390C6CC0B7846');
+
+contract.methods.read().call()
+.then(result => console.log(result));
+
+web3.eth.sendTransaction({from: '0xFA17F09e8464Bd0c592Daf09bf285B5cD72Bec3D', value: 1000})
+
+contract.methods.write().sendTransaction({from: '0xFA17F09e8464Bd0c592Daf09bf285B5cD72Bec3D'});