1 sub
= unlimited requests
Subscription, not per-request
One funded subscription account covers unlimited requests. No per-call markup, no oracle network fees.
Live on Solana mainnet
Random. Verifiable.
Cheap.
The on-chain randomness service for any Solana program. Native Ed25519 verification. Subscription pricing. No oracle middleman.
Per request
~5×10⁻⁶SOL
Callback compute
~200k CU
Verification
NativeEd25519
Verified
req #187,4021180ms
Random output · 32 bytesVerified
0xa3f74e8c2f1d9b6e0c8d4a7e2b1f5d3c9a6e8b1d2f4a7c9e3b5d8f0a2c4e7b9d
Computation log
>HMAC_SHA256(secret, seed || slot || id) ✓
>ed25519::verify(proof) ✓
>ed25519: 9f4a...3c1d8e7b
Total req.
187,402
Cost / req
~5×10⁻⁶ SOL
Compute
~200k CU
Live
#187,400Loot.box→0xa3f74e8c…7b9dnow ago·
#187,397RaffleX→0x12cd9b6e…0f4a8s ago·
#187,394Fortuna→0x4e8c2f1d…6cac16s ago·
#187,391DiceRoll→0x9b6e0c8d…2f4a24s ago·
#187,388MysticDraw→0x1f5d3c9a…7c9e32s ago·
#187,385Chance→0xc9a6e8b1…3b5d35s ago·
#187,382RNGProto→0xd2f4a7c9…8f0a43s ago·
#187,379FairLootery→0xe3b5d8f0…2c4e51s ago·
#187,376Spin.fi→0xf0a2c4e7…b9da59s ago·
#187,373ProtoLuck→0x7c9e3b5d…1d2f67s ago·
#187,370TrustDraw→0x8b1d2f4a…3c9a70s ago·
#187,367Atlas.RNG→0x6e0c8d4a…1f5d78s ago·
#187,400Loot.box→0xa3f74e8c…7b9dnow ago·
#187,397RaffleX→0x12cd9b6e…0f4a8s ago·
#187,394Fortuna→0x4e8c2f1d…6cac16s ago·
#187,391DiceRoll→0x9b6e0c8d…2f4a24s ago·
#187,388MysticDraw→0x1f5d3c9a…7c9e32s ago·
#187,385Chance→0xc9a6e8b1…3b5d35s ago·
#187,382RNGProto→0xd2f4a7c9…8f0a43s ago·
#187,379FairLootery→0xe3b5d8f0…2c4e51s ago·
#187,376Spin.fi→0xf0a2c4e7…b9da59s ago·
#187,373ProtoLuck→0x7c9e3b5d…1d2f67s ago·
#187,370TrustDraw→0x8b1d2f4a…3c9a70s ago·
#187,367Atlas.RNG→0x6e0c8d4a…1f5d78s ago·
The Pitch
Verifiable randomness,
without the oracle tax.
Three reasons protocols choose DumpFun VRF over Switchboard or Chainlink — at scale.
200k
compute units / callback
Native Ed25519 verification
Proofs verified using Solana's native Ed25519 sysvar precompile — the same one the runtime already runs.
0
third-party oracles
No middleman
You CPI directly into the coordinator program on-chain. Zero third-party oracle networks taking a margin.
Side by side
90% cheaper.
Same security guarantees.
For protocols making 1,000+ requests per day, the math is brutal.
DumpFun VRF
$5/ 1k req.
Switchboard VRF
$50/ 1k req.
Chainlink VRF
$50+/ 1k req.
Estimates based on public docs; varies by network conditions.
| Capability | DumpFun VRF | Switchboard | Chainlink |
|---|---|---|---|
| Pricing model | Flat subscription | Per-request fee | Per-request fee |
| Verification | HMAC + Ed25519 (native) | Groth16 proof | Custom VRF proof |
| Oracle dependency | Self-hosted, no third party | Switchboard network | Chainlink network |
| Compute units | ~200k CU | ~400k+ CU | ~400k+ CU |
| Uptime control | You control fulfillment | Depends on network | Depends on network |
The Lifecycle
Three steps, verifiable end-to-end.
Every randomness request flows through the same path. No black boxes — every step is provable on-chain.
01
Request
Your program CPIs into the coordinator with a deterministic seed and up to four callback accounts.
vrf::cpi::request_random_words(ctx, 1, seed)02
Compute
Off-chain oracle computes HMAC-SHA256 randomness, signs it with Ed25519. The secret never leaves the oracle.
randomness = HMAC(secret, seed || slot || id)03
Verify & Callback
Solana's Ed25519 precompile verifies the proof on-chain. The coordinator CPIs the result into your fulfill_random_words.
fulfill_random_words(request_id, randomness)The Path
Four steps from zero to randomness.
Permissionless. Deploy your program, register, and start consuming verifiable randomness.
Step 01
Create a subscription
Fund a subscription account once. Covers unlimited future requests.
Step 02
Register your program
Authorize your Solana program as a consumer of that subscription.
Step 03
Implement the callback
Add a fulfill_random_words instruction. The coordinator CPIs into it.
Step 04
Request randomness
CPI the coordinator with a deterministic seed. Verified randomness lands in your callback.
Early access · slots reserved at mainnet launch
Reserve your subscription slot.
Connect any Solana wallet, tell us about your program, and we’ll save your seat. Mainnet ships, you go live first.
FAQ
Frequently asked
The questions developers ask before integrating.
Ship random. Ship verified.
Cheap, verifiable randomness for any Solana program. Permissionless registration. No gatekeeping, no waitlists.
Live on Solana mainnet