and successfully minted NFT (using OpenZeppelin Presets in the link above) on rinkeby, thank you so much for the tutorial!
Now, I needed to verify the deployed contracts on rinkeby, but since i was using presets, no code (only json) was provided. I found 2 other threads to help me:
I installed truffle-plugin-verify as outlined in this thread
npx truffle run verify ERC721PresetMinterPauserAutoId --network bsctestnet
Verifying ERC721PresetMinterPauserAutoId
Unexpected token u in JSON at position 0
Failed to verify 1 contract(s): ERC721PresetMinterPauserAutoId
but found out that i could not verify without the solidity source.
i then used the flattener on this thread (since im only npm install --save-dev @openzeppelin/contracts - no v3 as in the thread):
I managed to locate the source from ./node_modules/node_modules/@openzeppelin/contracts/token/ERC721/presets/ERC721PresetMinterPauserAutoId.sol
I ran this command:
npx truffle-flattener ./node_modules/node_modules/@openzeppelin/contracts/token/ERC721/presets/ERC721PresetMinterPauserAutoId.sol > ./contracts/FlatERC721PresetMinterPauserAutoId.sol
and hit this error:
npx: installed 64 in 12.022s
(node:35350) Warning: Accessing non-existent property 'INVALID_ALT_NUMBER' of module exports inside circular dependency
(Use node --trace-warnings ... to show where the warning was created)
(node:35350) Warning: Accessing non-existent property 'INVALID_ALT_NUMBER' of module exports inside circular dependency
Error: None of the sub-resolvers resolved "node_modules/node_modules/@openzeppelin/contracts/token/ERC721/presets/ERC721PresetMinterPauserAutoId.sol" location.
at ResolverEngine. (/Users/lucky/.npm/_npx/35350/lib/node_modules/truffle-flattener/node_modules/@resolver-engine/core/build/src/resolverengine.js:35:23)
at Generator.next ()
at fulfilled (/Users/lucky/.npm/_npx/35350/lib/node_modules/truffle-flattener/node_modules/@resolver-engine/core/build/src/resolverengine.js:4:58)
I am pretty much stuck using the programmatic means at this point. My next attempt will be to do this manually on Remix.
I post this here hopefully someone has a solution as truffle so far been very efficient in getting contract tested, and deployed.
hi Frangio, thank you so much for the prompt reply.
I tried your suggestion, but still got the same error of unexpected token at position 0 at verify.
~/dev/eth-nft/contracts $ npx truffle compile
Compiling your contracts...
===========================
âś” Fetching solc version list from solc-bin. Attempt #1
> Compiling ./contracts/ERC721PresetMinterPauserAutoId.sol
âś” Fetching solc version list from solc-bin. Attempt #1
> Compilation warnings encountered:
Warning: SPDX license identifier not provided in source file. Before publishing, consider adding a comment containing "SPDX-License-Identifier: <SPDX-License>" to each source file. Use "SPDX-License-Identifier: UNLICENSED" for non-open-source code. Please see https://spdx.org for more information.
--> /Users/lucky/dev/eth-nft/contracts/ERC721PresetMinterPauserAutoId.sol
,Warning: Source file does not specify required compiler version! Consider adding "pragma solidity ^0.8.0;"
--> /Users/lucky/dev/eth-nft/contracts/ERC721PresetMinterPauserAutoId.sol
> Everything is up to date, there is nothing to compile.
~/dev/eth-nft/contracts $ npx truffle run verify ERC721PresetMinterPauserAutoId --network rinkeby
Verifying ERC721PresetMinterPauserAutoId
Unexpected token u in JSON at position 0
Failed to verify 1 contract(s): ERC721PresetMinterPauserAutoId
I finally got it working by deploying a new contract with your suggestion. thanks you so much.
here is what i did:
follow the instructions here by @abcoathup
instead of using presets (see Getting the contract artifacts section), don’t copy the build dir, instead use suggestion by @frangio above.
after you have completed all the steps in the tutorial, use this to verify (i used truffle). Another good source if you ran into issue using truffle-plugin-verify is to read the code in the repo (look up rkalis/truffle-plugin-verify in github…sorry, newbie only limited to 2 urls per post).
thx again for @frangio@abcoathup for their help, learn so much from your contribution.
Hi @luckydao . I am running into the same issue. I did what @frangio suggested but now I'm getting this error.
npx truffle console --network mumbai
truffle(mumbai)> migrate
Compiling your contracts...
===========================
> Compiling ./contracts/ERC721PresetMinterPauserAutoId.sol
@openzeppelin/contracts/token/ERC721/presets/ERC721PresetMinterPauserAutoId.sol:3:1: ParserError: Source file requires different compiler version (current compiler is 0.5.16+commit.9c3226ce.Emscripten.clang - note that nightly builds are considered to be strictly less than the released version
pragma solidity ^0.8.0;
^---------------------^
Error: Truffle is currently using solc 0.5.16, but one or more of your contracts specify "pragma solidity ^0.8.0".
Please update your truffle config or pragma statement(s).
(See https://trufflesuite.com/docs/truffle/reference/configuration#compiler-configuration for information on
configuring Truffle to use a specific solc compiler version.)
Here's how my contracts/ERC721PresetMinterPauserAutoId.sol looks like. Do I need to add anything to this solidity file?
Hi @Skyge I did like you said and added the compiler section on truffle-config.js. Now when I go through the migrate contract deployment phase, I get out of gas error. I have enough MATIC on my wallet. It looks like I have consumed the max 4 million gas limit.
Failed transaction id:
Here's the local error message:
npx truffle console --network mumbai
truffle(mumbai)> migrate
Compiling your contracts...
===========================
> Compiling ./contracts/ERC721PresetMinterPauserAutoId.sol
> Compilation warnings encountered:
Warning: SPDX license identifier not provided in source file. Before publishing, consider adding a comment containing "SPDX-License-Identifier: <SPDX-License>" to each source file. Use "SPDX-License-Identifier: UNLICENSED" for non-open-source code. Please see https://spdx.org for more information.
--> /Users/saurav/mynft7/contracts/ERC721PresetMinterPauserAutoId.sol
,Warning: Source file does not specify required compiler version! Consider adding "pragma solidity ^0.8.6;"
--> /Users/saurav/mynft7/contracts/ERC721PresetMinterPauserAutoId.sol
> Everything is up to date, there is nothing to compile.
Starting migrations...
======================
> Network name: 'mumbai'
> Network id: 80001
> Block gas limit: 20000000 (0x1312d00)
2_deploy.js
===========
Deploying 'ERC721PresetMinterPauserAutoId'
------------------------------------------
> transaction hash: 0xbc81777f7cbf4f517df4e70b6ddab5b5559c8ae0b9087e3e56ecb82628561dfd
Error: *** Deployment Failed ***
"ERC721PresetMinterPauserAutoId" ran out of gas (using a value you set in your network config or deployment parameters.)
* Block limit: 20000000 (0x1312d00)
* Gas sent: 4000000 (0x3d0900)
at /usr/local/lib/node_modules/truffle/build/webpack:/packages/deployer/src/deployment.js:365:1
at processTicksAndRejections (internal/process/task_queues.js:93:5)
at Migration._deploy (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:74:1)
at Migration._load (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:61:1)
at Migration.run (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/Migration.js:212:1)
at Object.runMigrations (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:150:1)
at Object.runFrom (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:110:1)
at Object.run (/usr/local/lib/node_modules/truffle/build/webpack:/packages/migrate/index.js:87:1)
at runMigrations (/usr/local/lib/node_modules/truffle/build/webpack:/packages/core/lib/commands/migrate.js:263:1)
at Object.run (/usr/local/lib/node_modules/truffle/build/webpack:/packages/core/lib/commands/migrate.js:228:1)
at Command.run (/usr/local/lib/node_modules/truffle/build/webpack:/packages/core/lib/command.js:140:1)
- Fetching solc version list from solc-bin. Attempt #1
- Fetching solc version list from solc-bin. Attempt #1
- Blocks: 0 Seconds: 0
Not sure, this can be caused by a number of reasons, such as your code size is too large, so you can increase the gas limit to deploy, or maybe there is something wrong in your constructor function.
Environment
Details
Code to reproduce