# String decode problem **URL:** \ **Category:** TypeScript SDK\ **Created:** [April 19, 2024, 6:21pm UTC](https://forum.fuel.network/t/string-decode-problem/5127 "2024-04-19T18:21:41Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![luisburigo](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/luisburigo/32/4160_2.png) [@luisburigo](https://forum.fuel.network/u/luisburigo)\ **Post date:** [April 19, 2024, 6:21pm UTC](https://forum.fuel.network/t/string-decode-problem/5127/1 "2024-04-19T18:21:41Z")
Libraries versions `forc` ā†’ 0.49.3 `fuels` ā†’ 0.79.0 I trying to get the `name` and `symbol` in my NFT Contract, this methods returns a `String`. > In `ts sdk` > Console error: ```bash /dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+abi-coder@0.79.0/node_modules/@fuel-ts/abi-coder/src/encoding/coders/v0/StdStringCoder.ts:63 throw new FuelError(ErrorCode.DECODE_ERROR, `Invalid std string byte data size.`); ^ _FuelError: Invalid std string byte data size. at StdStringCoder.decode (/dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+abi-coder@0.79.0/node_modules/@fuel-ts/abi-coder/src/encoding/coders/v0/StdStringCoder.ts:63:13) at OptionCoder.decode (/dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+abi-coder@0.79.0/node_modules/@fuel-ts/abi-coder/src/encoding/coders/v0/EnumCoder.ts:101:39) at OptionCoder.decode (/dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+abi-coder@0.79.0/node_modules/@fuel-ts/abi-coder/src/encoding/coders/v0/OptionCoder.ts:31:40) at FunctionFragment.decodeOutput (/dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+abi-coder@0.79.0/node_modules/@fuel-ts/abi-coder/src/FunctionFragment.ts:211:18) at /dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+program@0.79.0_dexie@4.0.4/node_modules/@fuel-ts/program/src/functions/invocation-results.ts:108:19 at Array.map () at FunctionInvocationResult.getDecodedValue (/dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+program@0.79.0_dexie@4.0.4/node_modules/@fuel-ts/program/src/functions/invocation-results.ts:106:41) at new InvocationResult (/dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+program@0.79.0_dexie@4.0.4/node_modules/@fuel-ts/program/src/functions/invocation-results.ts:60:23) at new FunctionInvocationResult (/dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+program@0.79.0_dexie@4.0.4/node_modules/@fuel-ts/program/src/functions/invocation-results.ts:163:5) at Function.build (/dev/sandbox/test-metadata/node_modules/.pnpm/@fuel-ts+program@0.79.0_dexie@4.0.4/node_modules/@fuel-ts/program/src/functions/invocation-results.ts:187:22) { VERSIONS: { FORC: '0.49.3', FUEL_CORE: '0.22.1', FUELS: '0.79.0' }, code: 'decode-error' } ``` The `OptionCoder` trying to decode a `StdString` but the `String` is provided. ---
**Author:** ![calldelegation](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/calldelegation/32/1484_2.png) [@calldelegation](https://forum.fuel.network/u/calldelegation)\ **Post date:** [April 22, 2024, 3:10am UTC](https://forum.fuel.network/t/string-decode-problem/5127/2 "2024-04-22T03:10:16Z")
Hey @luisburigo really appreciate you bringing up the issue. Our typescript SDK team is looking into it. šŸ«” ---
**Author:** ![danielbate](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/danielbate/32/1617_2.png) [@danielbate](https://forum.fuel.network/u/danielbate)\ **Post date:** [April 26, 2024, 8:52am UTC](https://forum.fuel.network/t/string-decode-problem/5127/4 "2024-04-26T08:52:05Z")
Hey @luisburigo, I can see from the error stack that you are using `v0` encoding. Unfortunately nested heap types (`String` in `Option` in your case) is unsupported under `v0`. Fortunately, we have `v1` being released [imminently](https://github.com/FuelLabs/fuels-ts/pull/2168) which does support nested heaps, so sit tight! If you want a quicker fix for this, Iā€™d recommend converting the `String` to a fixed length string using `__to_str_array` and your return type will need to be `Option`; But I really would recommend waiting for `v1`, it comes with lots of encoding improvements. ---
**Author:** ![danielbate](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/danielbate/32/1617_2.png) [@danielbate](https://forum.fuel.network/u/danielbate)\ **Post date:** [April 27, 2024, 3:06am UTC](https://forum.fuel.network/t/string-decode-problem/5127/5 "2024-04-27T03:06:21Z")
This was included in [fuels@0.83.0](https://github.com/FuelLabs/fuels-ts/releases/tag/v0.83.0). Be sure to also build your project with `forc@0.56.0`. ---
**Author:** ![luisburigo](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/luisburigo/32/4160_2.png) [@luisburigo](https://forum.fuel.network/u/luisburigo)\ **Post date:** [April 30, 2024, 10:00am UTC](https://forum.fuel.network/t/string-decode-problem/5127/6 "2024-04-30T10:00:11Z")
Hey @danielbate, thanks for the update on the versions. Could you also share which version of `fuel-core` is compatible with this release? I tried to run `pnpm fuels deploy`, but Iā€™m not sure if the version of `fuel-core` on my machine is the correct one. Error: ```auto Error: Unknown field "version" on type "ConsensusParameters".: { "response": { "data": null, "errors": [ { "message": "Unknown field \"version\" on type \"ConsensusParameters\".", "locations": [ { "line": 30, "column": 3 } ] }, { "message": "Unknown field \"version\" on type \"TxParameters\".", "locations": [ { "line": 54, "column": 3 } ] }, { "message": "Unknown field \"version\" on type \"ScriptParameters\".", "locations": [ { "line": 71, "column": 3 } ] }, { "message": "Unknown field \"version\" on type \"FeeParameters\".", "locations": [ { "line": 83, "column": 3 } ] }, { "message": "Unknown field \"version\" on type \"ContractParameters\".", "locations": [ { "line": 77, "column": 3 } ] }, { "message": "Unknown field \"version\" on type \"PredicateParameters\".", "locations": [ { "line": 63, "column": 3 } ] }, { "message": "Unknown field \"height\" on type \"Block\".", "locations": [ { "line": 20, "column": 3 } ] }, { "message": "Unknown field \"version\" on type \"GasCosts\".", "locations": [ { "line": 89, "column": 3 } ] }, { "message": "Field \"croo\" must not have a selection since type \"U64\" has no subfields", "locations": [ { "line": 184, "column": 3 } ] }, { "message": "Fragment \"DependentCostFragment\" cannot be spread here as objects of type \"U64\" can never be of type \"DependentCost\"", "locations": [ { "line": 185, "column": 5 } ] } ], "status": 200, "headers": {} }, "request": { "query": "query getChain {\n chain {\n ...chainInfoFragment\n }\n}\n\nfragment chainInfoFragment on ChainInfo {\n name\n latestBlock {\n ...blockFragment\n }\n daHeight\n consensusParameters {\n ...consensusParametersFragment\n }\n}\n\nfragment blockFragment on Block {\n id\n height\n header {\n time\n }\n transactions {\n id\n }\n}\n\nfragment consensusParametersFragment on ConsensusParameters {\n version\n txParams {\n ...TxParametersFragment\n }\n predicateParams {\n ...PredicateParametersFragment\n }\n scriptParams {\n ...ScriptParametersFragment\n }\n contractParams {\n ...ContractParametersFragment\n }\n feeParams {\n ...FeeParametersFragment\n }\n gasCosts {\n ...GasCostsFragment\n }\n baseAssetId\n chainId\n}\n\nfragment TxParametersFragment on TxParameters {\n version\n maxInputs\n maxOutputs\n maxWitnesses\n maxGasPerTx\n maxSize\n}\n\nfragment PredicateParametersFragment on PredicateParameters {\n version\n maxPredicateLength\n maxPredicateDataLength\n maxGasPerPredicate\n maxMessageDataLength\n}\n\nfragment ScriptParametersFragment on ScriptParameters {\n version\n maxScriptLength\n maxScriptDataLength\n}\n\nfragment ContractParametersFragment on ContractParameters {\n version\n contractMaxSize\n maxStorageSlots\n}\n\nfragment FeeParametersFragment on FeeParameters {\n version\n gasPriceFactor\n gasPerByte\n}\n\nfragment GasCostsFragment on GasCosts {\n version\n add\n addi\n aloc\n and\n andi\n bal\n bhei\n bhsh\n burn\n cb\n cfei\n cfsi\n div\n divi\n ecr1\n eck1\n ed19\n eq\n exp\n expi\n flag\n gm\n gt\n gtf\n ji\n jmp\n jne\n jnei\n jnzi\n jmpf\n jmpb\n jnzf\n jnzb\n jnef\n jneb\n lb\n log\n lt\n lw\n mint\n mlog\n modOp\n modi\n moveOp\n movi\n mroo\n mul\n muli\n mldv\n noop\n not\n or\n ori\n poph\n popl\n pshh\n pshl\n ret\n rvrt\n sb\n sll\n slli\n srl\n srli\n srw\n sub\n subi\n sw\n sww\n time\n tr\n tro\n wdcm\n wqcm\n wdop\n wqop\n wdml\n wqml\n wddv\n wqdv\n wdmd\n wqmd\n wdam\n wqam\n wdmm\n wqmm\n xor\n xori\n call {\n ...DependentCostFragment\n }\n ccp {\n ...DependentCostFragment\n }\n croo {\n ...DependentCostFragment\n }\n csiz {\n ...DependentCostFragment\n }\n k256 {\n ...DependentCostFragment\n }\n ldc {\n ...DependentCostFragment\n }\n logd {\n ...DependentCostFragment\n }\n mcl {\n ...DependentCostFragment\n }\n mcli {\n ...DependentCostFragment\n }\n mcp {\n ...DependentCostFragment\n }\n mcpi {\n ...DependentCostFragment\n }\n meq {\n ...DependentCostFragment\n }\n retd {\n ...DependentCostFragment\n }\n s256 {\n ...DependentCostFragment\n }\n scwq {\n ...DependentCostFragment\n }\n smo {\n ...DependentCostFragment\n }\n srwq {\n ...DependentCostFragment\n }\n swwq {\n ...DependentCostFragment\n }\n contractRoot {\n ...DependentCostFragment\n }\n stateRoot {\n ...DependentCostFragment\n }\n vmInitialization {\n ...DependentCostFragment\n }\n newStoragePerByte\n}\n\nfragment DependentCostFragment on DependentCost {\n __typename\n ... on LightOperation {\n base\n unitsPerGas\n }\n ... on HeavyOperation {\n base\n gasPerUnit\n }\n}" } } ``` Using the `fuel-toolchain.toml` with: ```auto [toolchain] channel = "nightly-2024-04-12" [components] forc = "0.56.0" ``` And `fuel-core` in docker: ```auto FROM ghcr.io/fuellabs/fuel-core:v0.22.1 ``` ---
**Author:** ![p.s](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.fuel.network/p.s/32/2491_2.png) [@p.s](https://forum.fuel.network/u/p.s)\ **Post date:** [May 1, 2024, 10:23am UTC](https://forum.fuel.network/t/string-decode-problem/5127/7 "2024-05-01T10:23:38Z")
Hey @luisburigo šŸ‘‹ You can find the compatible versions for the 0.83.0 release in the [release notes](https://github.com/FuelLabs/fuels-ts/releases/tag/v0.83.0). In your case, you will need `fuel-core@0.24.3` and `forc@0.56.0`. Hope that helps šŸ™‚