Prediction Markets

Intro

Helena prediction markets leveraged and forked Gnosis technology in order to create their Smart Contracts. The initial deployment today can be found at https://gnosis-pm-contracts.readthedocs.io/en/latest/.

The xDai contracts deployed and being used today by Helena can be found in the following addresses on xDai:

Smart Contract	Address	Network	Description	Docs
P+	0xCFC64	Mainnet	The main token live in mainnet. Aggregation of your previous competition earned xP+	Link
xP+	0xb59f0	xDai	The play token to interact with prediction markets, derivative of P+	Link
LSMR Market Maker	0x43B6..	xDai	Calculates share prices based on share distribution and initial funding	Link
StandardMarketFactory	0xa2ea2	xDai	Allows to create Market Contracts	Link
Event Factory	0x43a9c	xDai	Allows to create Event Contracts	Link
Central Oracle Factory	0xfb60b	xDai	Allows to create instances of Centralized Oracles	Link

Interacting with Helena Smart Contracts

1: Via Javascript API

If you want to interact with Helena Smart Contracts, and interact with markets using BUY and SELL operations, it is encouraged for you to use our Javascript API. This API will connect directly with the live instance of Helena Smart Contracts and let your interact with them by using a web3.Contract object.

2: Via REST API (Read)

If you want to consume Helena information to make an application on top of Helena, you should definitely take a look at our Swagger API.

3: Via Web3

If none of the previous options satisfied your needs, you can always use our contract address and ABI to interact with our Smart Contracts. You can see more information in web3.js docs.