personhood oracle demo frequency

[brenzi]

fork this repo and start your work based on the ab/node-template-sink branch

the demo setup is described here. should allow to fully reproduce the sub0 demo:
https://github.com/encointer/personhood-oracle/blob/ab/node-template-sink/README.md

make the Oracle write to frequency

refactor this RPC call to send an extrinsic to fequency instead of node_template

definition of rpc method:

personhood-oracle/enclave-runtime/src/rpc/worker_api_direct.rs

Line 239 in 6a518bc

io.add_sync_method(personhoodoracle_issue_node_template_xt, move |params: Params| {

here we verify encointer reputation:

personhood-oracle/enclave-runtime/src/rpc/worker_api_direct.rs

Lines 520 to 527 in 6a518bc

	// Check reputation first - will be changed later to have the user submit their `ProofOfAttendance`
	let reputations = fetch_reputation_inner(params.clone())?;
	let verified_reputations = reputations.iter().filter(|rep| rep.is_verified()).count();
	if verified_reputations == 0 {
	return Err("The user does not have any reputation".to_string())
	}

then we compose an extrinsic (here comes your extrinsic). We hard-code metadata here. good enough for demo, but we have upstream issues in the backlog to defive this from metadata more easily

personhood-oracle/enclave-runtime/src/rpc/worker_api_direct.rs

Line 548 in 6a518bc

let call = OpaqueCall::from_tuple(&((7u8, 0u8), subject_template_idx));

CLI client

The easiest start will be to use our cli client for the demo:

refactor this according to your needs:

personhood-oracle/cli/src/personhood_oracle/commands/issue_node_template_xt.rs

Line 38 in 6a518bc

impl IssueNodeTemplateXtCmd {

browser dapp

If you insist on a js dapp for the demo, you may find inspiration here: A while back, Encointer has integrated Integritee rpc's:
https://github.com/encointer/encointer-js/tree/master/packages/worker-api

noteworthy technical debt

with relevance to the frequency use case

• Enable read proof verification #24
• avoid leakage through reputation lookup #11
• invalidate reputation to prevent sybil attack #6
• target A/B do not assume same pallet indices integritee-network/worker#1445

longterm FYI:

• will simplify dapps: make sidechain rpc compatible to polkadot-js/api and other dotsama wallets integritee-network/worker#1186