add tool to count and dump registered names

Change-Id: I2d5ee9a336f0a1fb0f05767b94c86696afbbd665

read_names.js

+#!/usr/bin/env nodejs
+var BigNumber = require('bignumber.js');
+var fs = require('fs');
+var Web3 = require('web3');
+
+var web3 = new Web3();
+web3.SolidityCoder = require('web3/lib/solidity/coder');
+
+web3.setProvider(new web3.providers.HttpProvider('http://localhost:8545'));
+
+var REG_ADDR_FILE = "contractAddress.txt";
+var REG_ADDR = "0xe53cb2ace8707526a5050bec7bcf979c57f8b44f";
+var REG_ABI_registerFor = ['bytes32', 'address', 'address'];
+var NAME_MAP = {};
+
+function readContractAddress() {
+    fs.readFile(REG_ADDR_FILE, function(err, content) {
+        if (err) {
+            console.log("Can't read contract address: " + err);
+        } else {
+            REG_ADDR = String(content);
+        }
+        getAllNames();
+    });
+}
+
+function getAllNames() {
+    var totalBlocks = web3.eth.blockNumber;
+    var nextBlock = 0;
+    var rem = totalBlocks;
+    var cb = function(error, block) {
+        rem--;
+        if (error) {
+            console.log("Can't get block: " + error);
+        } else {
+            var transactionNum = block.transactions.length;
+            for (var t=0; t<transactionNum; t++) {
+                try {
+                    var tr = block.transactions[t];
+                    if (tr.to == REG_ADDR) {
+                        var p = web3.SolidityCoder.decodeParams(REG_ABI_registerFor, tr.input.substr(10));
+                        var n = web3.toUtf8(p[0]);
+                        console.log("Entry: " + n + " -> " + p[1] + " " + p[2]);
+                        NAME_MAP[n] = {"addr":p[2], "owner":p[1]};
+                    } else {
+                        console.log("Wrong contract: " + tr.to + " expected " + REG_ADDR);
+                    }
+                } catch (err) {
+                    console.log("Error reading transaction: " + err);
+                }
+            }
+        }
+        if (nextBlock < totalBlocks)
+            web3.eth.getBlock(nextBlock++, true, cb);
+        if (rem == 0) {
+            console.log("Found " + Object.keys(NAME_MAP).length + " name mappings");
+            fs.writeFile("names.json", JSON.stringify(NAME_MAP));
+        } else if (!error && block && block.transactions.length) {
+            console.log("Listing names: " + Math.round(100-100*rem/totalBlocks) + "%, " + rem + " remaining... ");
+        }
+    };
+    // 256 concurrent requests
+    for (; nextBlock < totalBlocks && nextBlock < 256; nextBlock++)
+        web3.eth.getBlock(nextBlock, true, cb);
+}
+
+readContractAddress();