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Graph API Consumer

Implements a simple oracle to get/display data query from a graph indexer (subquery, subsquid by example). Here we will display the data linked to the Astar dApp Staking.

It uses the crate phat_rollup_anchor_ink.

It supports:

  • configure the attestor(s) authorized to send the data. Only an address granted as MANAGER can do it.
  • handle the messages containing the data. Only an address granted as ATTESTOR can do it.
  • display the last value received for a given dApp.
  • allow meta transactions to separate the attestor and the payer.
  • managed the roles and grant an address as ADMIN, MANAGER, ATTESTOR. Only the admin can do it.

By default, the contract owner is granted as ADMIN and MANAGER but it is not granted as ATTESTOR.

Build

To build the contract:

cargo contract build

Run e2e tests

Before you can run the test, you have to install a Substrate node with pallet-contracts. By default, e2e tests require that you install substrate-contracts-node. You do not need to run it in the background since the node is started for each test independently. To install the latest version:

cargo install contracts-node --git https://github.com/paritytech/substrate-contracts-node.git

If you want to run any other node with pallet-contracts you need to change CONTRACTS_NODE environment variable:

export CONTRACTS_NODE="YOUR_CONTRACTS_NODE_PATH"

And finally execute the following command to start e2e tests execution.

cargo test --features e2e-tests