[Steem-red] - Globals Nodes, Error Handling, Input Validation, and Required Fields

Errors fixed

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Errors were not handled in a correct way in the library. For instance, when a user leave one of the required fields empty, the library didn't return any results. To fix this issue, I wrote the required fields validations by using a generic function to avoid repetition of code. Basically, I just checked for empty strings and null fields in the required inputs. In addition, I added the required attribute to the properties in Node-RED templates. So, by having the correct validations, Node-RED will tell the user that required fields are missing when they save the node or deploy the flow.

To return any error from the API as a payload to Node-RED, I created a if and else condition to determine whether it returned a response or an error. To be able to do so, I also had to create initial status of the node and final status at the error to handle any stage of the data.

Featured Added

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New nodes were added covering the following methods from the SteemJs API:

• getChainProperties
• getConfig
• getCurrentMedianHistoryPrice
• getDynamicGlobalProperties
• getFeedHistory
• getHardforkVersion
• getNextScheduledHardfork
• getRewardFund
• getVestingDelegations

All these nodes belong to the Globals category in the library and they all have a short description of what it does.

Requirements

To run the nodes on your localhost you must have Node-RED installed on your localhost. To install Node-RED, run the following command in your terminal:

$ sudo npm install -g --unsafe-perm node-red

Installation

$ git clone https://github.com/jayserdny/node-red-contrib-steem
$ cd node-red-contrib-steem
$ npm install

To install the node modules on your localhost, install it into your Node-RED runtime.

$ sudo npm link
$ cd ~/.node-red
$ npm link node-red-contrib-steem

Run node-red.

$ node-red

Open a browser and go to the address http://127.0.0.1:1880.

Roadmap

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As a roadmap, I will keep adding the missing nodes until have 100% coverage of the SteemJs API.

Contributions

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To contribute fork the node-red-contrib-steem repository and submit pull requests.

Changelog

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0.0.3 - 2018-01-28

• Added getChainProperties, getConfig, getCurrentMedianHistoryPrice, getDynamicGlobalProperties, getFeedHistory, getHardforkVersion, getNextScheduledHardfork, getRewardFund, getVestingDelegations nodes, generic method to validate fields, and error handling for each node.

0.0.2 - 2018-01-27

• Added getContent, getContentReplies, getDiscussionsByAuthorBeforeDate, getRepliesByLastUpdate, getContent, getContentReplies, getDiscussionsByAuthorBeforeDate, getRepliesByLastUpdate, getActiveWitnesses, getMinerQueue, getWitnessByAccount, getWitnessCount, getWitnesses, getWitnessesByVote nodes

0.0.1 - 2018-01-26

• Added getAccounts, getAccountCount, getConversionRequests, getAccountHistory, getOwnerHistory, getRecoveryRequest nodes

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Posted on Utopian.io - Rewarding Open Source Contributors

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