doc: refine readme.md

README.md

@@ -52,7 +52,8 @@ make build
 ## Run
 
 ### Run seed node
-Starting a Nebulas seed node is simple. After the build step above, run command:
+Starting a Nebulas seed node is simple. After the build step above, run a command:
+
 ```
 ./neb
 ```
@@ -135,7 +136,7 @@ The configuration schema is defined in proto _neblet/pb/config.proto:Config_. To
 ./neb -c <path>/config-seed.pb.txt
 ```
 
-Neb supports loading KeyStore file of Ethereum format. KeyStore files from config _key_dir_ are loaded during neb bootstrap. Example testing KeyStore looks like
+Neb supports loading KeyStore file in Ethereum format. KeyStore files from config _key_dir_ are loaded during neb bootstrap. Example testing KeyStore looks like
 
 ```
 {"version":3,"id":"272a46f1-5141-4234-b948-1b45c6708962","address":"555fcb1b7051d3aea5cf2c0167b4e19ed6a4f98d","Crypto":{"ciphertext":"ecd4b817fa9ebed736235476c91dec43e73e0ca3e8d2f13c004725349882fb49","cipherparams":{"iv":"1ab4ed89c95f66e994f183fed23df9f9"},"cipher":"aes-128-ctr","kdf":"scrypt","kdfparams":{"dklen":32,"salt":"baef3f92cdde9fd97a00879ce060763101530e9e66e4c75ec74352a41419bde0","n":1024,"r":8,"p":1},"mac":"d8ea471cea8184fb7b19c1563804b85a31a2b3d792dc59ecccdb15dbfb3cebc0"}}
@@ -178,13 +179,13 @@ time="2017-11-22T15:14:50+08:00" level=info msg="net.start: node start and join
 ```
 
 ## REPL console
-Nebulas provides an interactive javascript console, which can invoke all API and management RPC methods. Some management methods may require passphrase. Start console using command:
+Nebulas provide an interactive javascript console, which can invoke all API and management RPC methods. Some management methods may require passphrase. Start console using the command:
 
 ```
 ./neb console
 ```
 
-We have api and admin two schemes to access the consle cmds. Users can quickly enter instructions using the TAB key.
+We have API and admin two schemes to access the console cmds. Users can quickly enter instructions using the TAB key.
 
 ```
 > api.
@@ -215,7 +216,7 @@ The command parameters of the command line are consistent with the parameters of
 
 
 ## RPC
-Nebulas provides both [gRPC](https://grpc.io) and RESTful API, let users interact with Nebulas.
+Nebulas provide both [gRPC](https://grpc.io) and RESTful API, let users interact with Nebulas.
 
 #### Endpoint
 
@@ -266,16 +267,16 @@ For more details, please refer to [NEB RPC](https://github.com/nebulasio/wiki/bl
 
 
 ## NVM
-Nebulas implemented a nvm to run smart contracts like ethereum.NVM provides a javascript runtime environment through v8-engine.Users can write smart contracts by javascript, which is the most popular language for world.
+Nebulas implemented an nvm to run smart contracts like ethereum.NVM provides a javascript runtime environment through v8-engine.Users can write smart contracts by javascript, which is the most popular language in the world.
 
-We can deploy and run smart contracts by two rpc methods:
+We can deploy and run smart contracts by two RPC methods:
 
 ```
 SendTransaction()
 Call()
 ```
 Now you can create & deploy & call smart contracts directly over HTTP/console just by 'SendTransaction()'.
-If you want to create & deploy a smart contracts:
+If you want to create & deploy smart contracts:
 
 ```
 "use strict";
@@ -333,7 +334,7 @@ module.exports = BankVaultContract;
 curl -i -H 'Accept: application/json' -X POST http://localhost:8191/v1/transaction -H 'Content-Type: application/json' -d '{"from":"8a209cec02cbeab7e2f74ad969d2dfe8dd24416aa65589bf","to":"8a209cec02cbeab7e2f74ad969d2dfe8dd24416aa65589bf","nonce":1,"source":"\"use strict\";var BankVaultContract=function(){LocalContractStorage.defineMapProperty(this,\"bankVault\")};BankVaultContract.prototype={init:function(){},save:function(height){var deposit=this.bankVault.get(Blockchain.transaction.from);var value=new BigNumber(Blockchain.transaction.value);if(deposit!=null&&deposit.balance.length>0){var balance=new BigNumber(deposit.balance);value=value.plus(balance)}var content={balance:value.toString(),height:Blockchain.block.height+height};this.bankVault.put(Blockchain.transaction.from,content)},takeout:function(amount){var deposit=this.bankVault.get(Blockchain.transaction.from);if(deposit==null){return 0}if(Blockchain.block.height<deposit.height){return 0}var balance=new BigNumber(deposit.balance);var value=new BigNumber(amount);if(balance.lessThan(value)){return 0}var result=Blockchain.transfer(Blockchain.transaction.from,value);if(result>0){deposit.balance=balance.dividedBy(value).toString();this.bankVault.put(Blockchain.transaction.from,deposit)}return result}};module.exports=BankVaultContract;", "args":""}'
 ```
 If you succeed in deploying a smart contract, you will get the contract address & transaction hash as response.
-Then you can call this samrt contract:
+Then you can call this smart contract:
 
 1. get the smart contract address.
 2. give the 'function' you want to call.