Per-second funding streams and recursive dependency splits for open-source maintainers, on Stellar Soroban.
Most open-source funding still arrives as one-off grants. FlowPulse gives sponsors a way to pay maintainers continuously. Each maintainer can route part of that income to the projects they depend on, and each of those projects can do the same further upstream.
| What it does | Where | |
|---|---|---|
| Live micro-streams | Escrow XLM and stream it to a maintainer by the second. The recipient withdraws whenever they want. The sender can top up or cancel and gets back anything not yet streamed. | contracts/stream_router |
| Dependency cascades | Publish a split table generated from Cargo.toml / package.json. Funds sent to a project flow through to its upstreams, and through their tables, up to 3 levels deep. |
contracts/cascade_splitter |
| CI/CD bounties | Rules that watch a repo for merged, labeled PRs. Contributors opt in with stellar: G… in the PR description and are paid as a bounty stream in one click. |
frontend/src/lib/ci.ts |
| Audit receipts | Every transaction yields an RFC-8785 (JCS) receipt with a SHA-256 digest, an Ed25519-signed envelope, and a Horizon ledger anchor. Anyone can verify it client-side. | frontend/src/lib/receipts.ts |
Live demo: https://flow-pulse.github.io/FlowPulse/ (Stellar testnet; use Freighter set to Testnet)
Status: v0.1, testnet only. The contracts have not been audited, so don't point them at real funds.
| Contract | ID |
|---|---|
| StreamRouter | CA45PGMYO5CNRPCMW3THPKI26PK2CU3JU4XTJZJ3HZ4KLEFRKUQXUTWK |
| CascadeSplitter | CA4U6VUIFA33SQA5QCQYMFNEQTNN6XV43EAZ67IKXOB434V5GI5KB2SY |
Prerequisites: Node ≥ 20 with pnpm, Rust stable with the wasm32v1-none target, the Stellar CLI, and the Freighter wallet set to Testnet.
# Frontend (points at the live testnet contracts by default)
cd frontend
pnpm install
pnpm dev # http://localhost:5173
# Contracts
cd contracts
cargo test # unit tests (Soroban testutils)
stellar contract build
# Deploy your own copy to testnet
./scripts/deploy-testnet.shIn the app, open the wallet menu and use Friendbot to fund your Freighter account with testnet XLM.
Accrual is a pure function of ledger close time, so no keeper, cron, or oracle is needed:
streamed(t) = min(checkpoint_amount + rate_per_sec × (t − checkpoint_time), deposit)
withdrawable(t) = streamed(t) − withdrawn
create_stream, withdraw, withdraw_all, top_up, cancel, plus read methods get_stream, streams_by_sender, streams_by_recipient, withdrawable, stream_count. If a top-up arrives after the stream has run dry, accrual restarts from that moment, so the idle gap is never back-paid.
set_splits(owner, [{recipient, bps, label}]) publishes a table. Any basis points left unallocated stay with the owner as a reserve. distribute(from, owner, token, amount) routes funds recursively: if a recipient has its own table, its share keeps cascading (max depth 3, which also stops cycles). Rounding dust settles with the owner at each level, so payouts always sum exactly to amount. preview returns the same routing as a free dry run.
{
"receipt": { "schema": "flowpulse.receipt/v1", "contract_id": "…", "function": "withdraw_all",
"tx_hash": "…", "ledger": 123, "envelope_xdr": "…", "…": "…" },
"digest": { "alg": "SHA-256", "canonicalization": "RFC8785", "value": "…" }
}To verify one: canonicalize receipt with any RFC-8785 implementation, SHA-256 it, and compare the result to digest.value. Then recompute the network-bound transaction hash from envelope_xdr and check its Ed25519 signature. Finally, confirm on Horizon that the transaction landed in ledger. The app's verifier does all three, and has a 1-bit-mutation toggle that shows tampering being caught.
contracts/ Soroban smart contracts (Rust)
stream_router/ per-second streams
cascade_splitter/ recursive split tables
frontend/ Vite + React + TypeScript + Tailwind v4
src/lib/ soroban client, receipts (JCS), manifest parser, CI rules
src/pages/ Live Streams · Cascades · CI/CD · Earnings
design/ original Stitch exports + design systems (reference only)
scripts/ testnet deploy script
The UI follows the Architectural Drafting Standard design system (design/systems/architectural_drafting_standard/DESIGN.md).
cd contracts && cargo test # 15 contract tests
cd frontend && pnpm test # unit tests (JCS vectors, Ed25519, parsers)
cd frontend && INTEGRATION=1 pnpm test # + live checks against testnetSee open issues. Highlights:
- Headless GitHub Action that evaluates bounty rules on
pull_request.closedwebhooks - USDC and other SAC tokens alongside XLM
- Resolving maintainer addresses automatically (
FUNDING.json, crates.io/npm metadata) - Weight suggestions from download counts and commit activity
- A third contract:
bounty_escrow, with signature-authenticated webhook payouts
FlowPulse welcomes contributors, including through Drips Wave. Start with CONTRIBUTING.md and look for issues labeled good first issue.