Error while requesting on chain randomness using a vrf service [typescript SDK]

TypeScript SDK
,
1
  • Repo to reproduce the issue REPO
  • I was going through this Code , this is for generating vrf on chain in fuel. I created a similar contract which u can find here . this is the relevant code
 #[payable]
    fn request_random_number(seed: b256) {
        //let sender = msg_sender().unwrap();
        let amount = msg_amount();
        let msg_asset = msg_asset_id();

        require(msg_asset == AssetId::base(),"invalid-asset");

        let vrf = abi(Vrf, VRF_ID);
        let fee = vrf.get_fee(AssetId::base());

        require(fee == amount,"invalid-fee");

        let _ = vrf.request {
            gas: 1_000_000,
            asset_id: AssetId::base().bits(),
            coins: fee,
        }(seed);
    }

the code compiles and the contract is deployed succesfully, but when I try to call this function using the typescript sdk I get an error

 let get_fee = await contract.functions.rng_cost().get();
  console.log("rng cost fee : ", get_fee.value.toString());

  console.log("....... testing attempt 1 (1st seed) .......")

  const seed1 = generateSeed();

  console.log("seed1 generated: ",seed1.toString());

  const txn_request = await contract.functions.request_random_number(seed1).callParams({
    forward: [get_fee.value.toString(), baseAssetId],
  }).call();
  console.log("Transaction Id(request): ", txn_request.transactionId);
  • This is the error
> vrf_rng@1.0.0 test_contract /home/divy/fuel/Vrf_SampleRNG/vrf_rng
> pnpx ts-node scripts/test_contract.ts

The Fuel Node that you are trying to connect to is using fuel-core version 0.31.0,
which is not supported by the version of the TS SDK that you are using.
Things may not work as expected.
Supported fuel-core version: 0.26.0.
Your imported wallet Address:  fuel1yyvjlxdss79nklvt9cfuzthctr9fqj4ph5gu2hpwptcp7mjzex4skvqlsf
Your imported wallet Address(b256):  0x21192f99b0878b3b7d8b2e13c12ef858ca904aa1bd11c55c2e0af01f6e42c9ab
rng cost fee :  100
....... testing attempt 1 (1st seed) .......
seed1 generated:  0xbeed3282c4e6f5905e3800644c7b90408599783307f294c046d6438bc0da4b01
/home/divy/fuel/Vrf_SampleRNG/vrf_rng/node_modules/.pnpm/@fuel-ts+abi-coder@0.88.0/node_modules/@fuel-ts/abi-coder/src/Interface.ts:80
      throw new FuelError(
            ^
_FuelError: Log type with logId '16546776185816187435' doesn't exist in the ABI.
    at Interface.decodeLog (/home/divy/fuel/Vrf_SampleRNG/vrf_rng/node_modules/.pnpm/@fuel-ts+abi-coder@0.88.0/node_modules/@fuel-ts/abi-coder/src/Interface.ts:80:13)
    at /home/divy/fuel/Vrf_SampleRNG/vrf_rng/node_modules/.pnpm/@fuel-ts+account@0.88.0/node_modules/@fuel-ts/account/src/providers/transaction-response/getDecodedLogs.ts:38:43
    at Array.reduce (<anonymous>)
    at getDecodedLogs (/home/divy/fuel/Vrf_SampleRNG/vrf_rng/node_modules/.pnpm/@fuel-ts+account@0.88.0/node_modules/@fuel-ts/account/src/providers/transaction-response/getDecodedLogs.ts:29:19)
    at TransactionResponse.waitForResult (/home/divy/fuel/Vrf_SampleRNG/vrf_rng/node_modules/.pnpm/@fuel-ts+account@0.88.0/node_modules/@fuel-ts/account/src/providers/transaction-response/transaction-response.ts:262:14)
    at processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async Function.build (/home/divy/fuel/Vrf_SampleRNG/vrf_rng/node_modules/.pnpm/@fuel-ts+program@0.88.0/node_modules/@fuel-ts/program/src/functions/invocation-results.ts:185:22)
    at async /home/divy/fuel/Vrf_SampleRNG/vrf_rng/scripts/test_contract.ts:41:23 {
  VERSIONS: { FORC: '0.59.0', FUEL_CORE: '0.26.0', FUELS: '0.88.0' },
  metadata: {},
  code: 'log-type-not-found'
}
 ELIFECYCLE  Command failed with exit code 1.
  • fuelup show output
   Default host: x86_64-unknown-linux-gnu
fuelup home: /home/divy/.fuelup

Installed toolchains
--------------------
latest-x86_64-unknown-linux-gnu (default)
nightly-x86_64-unknown-linux-gnu
testnet-x86_64-unknown-linux-gnu

active toolchain
----------------
latest-x86_64-unknown-linux-gnu (default)
 forc : 0.61.2
   - forc-client
     - forc-deploy : 0.61.2
     - forc-run : 0.61.2
   - forc-crypto : 0.61.2
   - forc-debug : 0.61.2
   - forc-doc : 0.61.2
   - forc-fmt : 0.61.2
   - forc-lsp : 0.61.2
   - forc-tx : 0.61.2
   - forc-wallet : 0.8.1
 fuel-core : 0.30.0
 fuel-core-keygen : 0.30.0

fuels versions
--------------
forc : 0.64.0
forc-wallet : 0.64.0
  • you can find all the relevant information regarding executing scripts Here
2 Likes
2

hey @lokesh-lync, can you try updating the fuels version to 0.91.0 here and try again?

3

tried it! Did not work.

4

Can you try updating the toolchain, as our latest fuel core version is 0.31.0? It’d be best if all the versions you are using are latest

5

@div-lync please take a look here!

6

Tried , But did not work

7

Hey @div-lync :wave:

I can see you’re making a inter contract call.

You will need to add these contracts (via the addContracts method) to the function calls for both rng_cost and request_random_number.

You can find all the relevant documentation here.

(Moved to the TypeScript SDK forum section)

8

Thanks , It worked after using addContracts method

  • Output
> vrf_rng@1.0.0 test_contract /home/divy/fuel/Vrf_SampleRNG/vrf_rng
> pnpx ts-node scripts/test_contract.ts

The Fuel Node that you are trying to connect to is using fuel-core version 0.31.0,
which is not supported by the version of the TS SDK that you are using.
Things may not work as expected.
Supported fuel-core version: 0.30.0.
Your imported wallet Address:  fuel1yyvjlxdss79nklvt9cfuzthctr9fqj4ph5gu2hpwptcp7mjzex4skvqlsf
Your imported wallet Address(b256):  0x21192f99b0878b3b7d8b2e13c12ef858ca904aa1bd11c55c2e0af01f6e42c9ab
rng cost fee :  100
....... testing attempt 1 (1st seed) .......
seed1 generated:  0x770f7a2ee8a0d8e82345ff0ff14518d99ed338bf042f372525bacae23310db0b
Transaction Id(request):  0x94eaf68a8437405c9295e0b4ee379f063a47dec79f2e502e62aacdfec888891e

 const Vrf = VrfImplAbi__factory.connect(vrf_CONTRACT_ID, wallet);

  let get_fee = await contract.functions.rng_cost()
  .addContracts([Vrf])
  .get();
  console.log("rng cost fee : ", get_fee.value.toString());

  console.log("....... testing attempt 1 (1st seed) .......")

  const seed1 = generateSeed();

  console.log("seed1 generated: ",seed1.toString());

  const txn_request = await contract.functions.request_random_number(seed1)
  .callParams({
    forward: [get_fee.value.toString(), baseAssetId],
  })
  .addContracts([Vrf])
  .call();
  console.log("Transaction Id(request): ", txn_request.transactionId);
2 Likes
9

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