Get Massa slot events with GRPC-react

Configuration

update in App.tsx :

GRPC_URL with url of your massa node GRPC server
EMITTER_ADDRESS with the address of the emitter

We need unidirectional streaming from the server to operate.

Massa node should be on this branch : https://github.com/massalabs/massa/tree/grpc_web_stream

Update the node config in config.toml :

grpc.grpc.public.accept_http1 = true
grpc.grpc.public.enable_cors = true

Example

With Autonomousprice massa example

Deploy the SC https://github.com/massalabs/massa-sc-examples/blob/main/autonomousprice/contracts/assembly/contracts/autonomousprice.ts on massa blockchain

-> 'Contract deployed at address: AS12gWWfmXgT7HSZ8kc6syJbQA5EnDreggGRjwjSfYnR8jeL3tYU4'
- Update GRPC_URL
- Update EMITTER_ADDRESS with sc address : AS12gWWfmXgT7HSZ8kc6syJbQA5EnDreggGRjwjSfYnR8jeL3tYU4
Start this app
```
npm run start
```
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