Added abiDecoder class
This commit is contained in:
Halil Beycan
parent
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commit
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@ -2,6 +2,7 @@ composer.phar
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/vendor/
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.phpintel/
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/.idea/
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test.php
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# Commit your application's lock file http://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file
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217
resources/abi.json
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217
resources/abi.json
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@ -0,0 +1,217 @@
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[
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{
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"constant": true,
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"inputs": [],
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"name": "name",
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"outputs": [
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{
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"name": "",
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"type": "string"
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}
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],
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"payable": false,
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"stateMutability": "view",
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"type": "function"
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},
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{
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"constant": false,
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"inputs": [
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{
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"name": "_spender",
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"type": "address"
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},
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{
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"name": "_value",
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"type": "uint256"
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}
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],
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"name": "approve",
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"outputs": [
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{
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"name": "success",
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"type": "bool"
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}
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],
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"payable": false,
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"stateMutability": "nonpayable",
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [],
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"name": "totalSupply",
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"outputs": [
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{
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"name": "",
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"type": "uint256"
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}
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],
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"payable": false,
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"stateMutability": "view",
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"type": "function"
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},
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{
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"constant": false,
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"inputs": [
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{
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"name": "_from",
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"type": "address"
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},
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{
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"name": "_to",
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"type": "address"
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},
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{
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"name": "_value",
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"type": "uint256"
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}
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],
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"name": "transferFrom",
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"outputs": [
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{
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"name": "success",
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"type": "bool"
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}
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],
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"payable": false,
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"stateMutability": "nonpayable",
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [],
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"name": "decimals",
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"outputs": [
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{
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"name": "",
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"type": "uint8"
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}
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],
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"payable": false,
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"stateMutability": "view",
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [
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{
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"name": "_owner",
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"type": "address"
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}
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],
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"name": "balanceOf",
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"outputs": [
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{
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"name": "balance",
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"type": "uint256"
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}
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],
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"payable": false,
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"stateMutability": "view",
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [],
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"name": "symbol",
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"outputs": [
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{
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"name": "",
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"type": "string"
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}
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],
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"payable": false,
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"stateMutability": "view",
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"type": "function"
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},
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{
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"constant": false,
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"inputs": [
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{
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"name": "_to",
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"type": "address"
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},
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{
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"name": "_value",
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"type": "uint256"
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}
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],
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"name": "transfer",
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"outputs": [
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{
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"name": "success",
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"type": "bool"
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}
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],
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"payable": false,
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"stateMutability": "nonpayable",
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"type": "function"
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},
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{
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"constant": true,
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"inputs": [
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{
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"name": "_owner",
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"type": "address"
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},
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{
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"name": "_spender",
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"type": "address"
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}
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],
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"name": "allowance",
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"outputs": [
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{
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"name": "remaining",
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"type": "uint256"
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}
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],
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"payable": false,
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"stateMutability": "view",
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"type": "function"
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},
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{
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"anonymous": false,
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"inputs": [
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{
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"indexed": true,
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"name": "_from",
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"type": "address"
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},
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{
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"indexed": true,
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"name": "_to",
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"type": "address"
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},
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{
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"indexed": false,
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"name": "_value",
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"type": "uint256"
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}
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],
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"name": "Transfer",
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"type": "event"
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},
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{
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"anonymous": false,
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"inputs": [
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{
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"indexed": true,
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"name": "_owner",
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"type": "address"
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},
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{
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"indexed": true,
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"name": "_spender",
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"type": "address"
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},
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{
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"indexed": false,
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"name": "_value",
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"type": "uint256"
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}
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],
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"name": "Approval",
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"type": "event"
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}
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]
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229
src/AbiDecoder.php
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229
src/AbiDecoder.php
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@ -0,0 +1,229 @@
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<?php
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/**
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* This file is part of web3.php package.
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* @author Halil Beycan <halilbeycan0@gmail.com>
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* @license MIT
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*/
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namespace Web3;
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use Web3\Contracts\Ethabi;
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use Web3\Contracts\Types\Address;
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use Web3\Contracts\Types\Boolean;
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use Web3\Contracts\Types\Bytes;
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use Web3\Contracts\Types\DynamicBytes;
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use Web3\Contracts\Types\Integer;
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use Web3\Contracts\Types\Str;
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use Web3\Contracts\Types\Uinteger;
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use phpseclib\Math\BigInteger as BN;
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class AbiDecoder
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{
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/**
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* @var array
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*/
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private $abi = [];
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/**
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* @var Ethabi
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*/
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private $ethAbi;
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/**
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* @var array
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*/
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private $methodIds = [];
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/**
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* @param array|null $abi
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*/
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public function __construct(?array $abi = null)
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{
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$this->abi = is_null($abi) ? json_decode(file_get_contents(dirname(__DIR__) . '/resources/abi.json')) : $abi;
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$this->ethAbi = new Ethabi([
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'address' => new Address,
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'bool' => new Boolean,
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'bytes' => new Bytes,
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'dynamicBytes' => new DynamicBytes,
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'int' => new Integer,
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'string' => new Str,
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'uint' => new Uinteger,
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]);
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array_map([$this, 'parseMethodIds'], $this->abi);
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}
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/**
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* @param object $input
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* @return string
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*/
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private function typeToString(object $input) : string
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{
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if ($input->type === "tuple") {
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return "(" . implode(',', array_map([$this, 'typeToString'], $input->components)) . ")";
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}
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return $input->type;
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}
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/**
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* @param array $inputs
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* @return string
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*/
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private function parseInputs(array $inputs) : string
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{
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return "(" . implode(',', array_map([$this, 'typeToString'], $inputs)) . ")";
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}
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/**
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* @param object $obj
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* @return void
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*/
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private function parseMethodIds(object $obj)
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{
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if (isset($obj->name)) {
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$signature = Utils::sha3($obj->name . $this->parseInputs($obj->inputs));
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if ($obj->type === "event") {
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$this->methodIds[substr($signature, 2)] = $obj;
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} else {
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$this->methodIds[substr($signature, 2, 8)] = $obj;
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}
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}
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}
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/**
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* @param string $input
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* @return object
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*/
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public function decodeInput(string $input) : object
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{
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$abiItem = $this->methodIds[substr($input, 2, 8)];
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$types = array_column($abiItem->inputs, 'type');
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if ($abiItem) {
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$decoded = $this->ethAbi->decodeParameters($types, substr($input, 10));
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$retData = (object) [
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"name" => $abiItem->name,
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"params" => [],
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];
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for ($i = 0; $i < count($decoded); $i++) {
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$param = $decoded[$i];
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$parsedParam = $param;
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$isArray = is_array($param);
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$isUint = strpos($abiItem->inputs[$i]->type, "uint") !== false;
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$isInt = strpos($abiItem->inputs[$i]->type, "int") !== false;
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$isAddress = strpos($abiItem->inputs[$i]->type, "address") !== false;
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if ($isUint || $isInt) {
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if ($isArray) {
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$parsedParam = array_map(function($val) {
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return (new BN($val))->toString();
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}, $param);
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} else {
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$parsedParam = (new BN($param))->toString();
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}
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}
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if ($isAddress) {
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if ($isArray) {
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$parsedParam = array_map('strtolower', $param);
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} else {
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$parsedParam = strtolower($param);
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}
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}
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$retData->params[] = [
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"name" => $abiItem->inputs[$i]->name,
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"value" => $parsedParam,
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"type" => $abiItem->inputs[$i]->type,
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];
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}
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}
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return $retData;
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}
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/**
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* @param array $logs
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* @return array
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*/
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public function decodeLogs(array $logs) : array
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{
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$logs = array_filter($logs, function($log) {
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return count($log->topics) > 0;
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});
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return array_map(function($log) {
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$method = $this->methodIds[substr($log->topics[0], 2)];
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if ($method) {
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$logData = $log->data;
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$decodedParams = [];
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$dataIndex = 0;
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$topicsIndex = 1;
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$dataTypes = [];
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array_map(function($input) use (&$dataTypes) {
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if (!$input->indexed) {
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$dataTypes[] = $input->type;
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}
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}, $method->inputs);
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$decoded = $this->ethAbi->decodeParameters($dataTypes, substr($logData, 2));
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array_map(function($input) use ($log, &$decodedParams, &$topicsIndex, &$dataIndex, $decoded) {
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$decodedP = (object) [
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"name" => $input->name,
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"type" => $input->type,
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];
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if ($input->indexed) {
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$decodedP->value = $log->topics[$topicsIndex];
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$topicsIndex++;
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} else {
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$decodedP->value = $decoded[$dataIndex];
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$dataIndex++;
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}
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if ($input->type === "address") {
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$decodedP->value = strtolower($decodedP->value);
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if (strlen($decodedP->value) > 42) {
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$toRemove = strlen($decodedP->value) - 42;
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$decodedP->value = "0x" . substr($decodedP->value, -40);
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}
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}
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if (
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$input->type === "uint256" ||
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$input->type === "uint8" ||
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$input->type === "int"
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) {
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if (is_string($decodedP->value) && str_starts_with($decodedP->value, '0x')) {
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$decodedP->value = (new BN(substr($decodedP->value, 2), 16))->toString(10);
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} else {
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$decodedP->value = (new BN($decodedP->value))->toString(10);
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}
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}
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$decodedParams[] = $decodedP;
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}, $method->inputs);
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return (object) [
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"name" => $method->name,
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"events" => $decodedParams,
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"address" => $log->address,
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];
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}
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}, $logs);
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}
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}
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