{"record":{"id":"c74baaa30e53a1e5","repo":"FuelLabs/fuels-rs","slug":"failed-to-deploy-the-contract","errorCode":null,"errorMessage":"Failed to deploy the contract","messagePattern":"Failed to deploy the contract","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"error","filePath":"packages/fuels-macros/src/setup_program_test/code_gen.rs","lineNumber":162,"sourceCode":"\n            quote! {\n                let salt: [u8; 32] = #salt;\n\n                let #contract_instance_name = {\n                    let load_config = ::fuels::programs::contract::LoadConfiguration::default().with_salt(salt);\n\n                    let loaded_contract = ::fuels::programs::contract::Contract::load_from(\n                        #bin_path,\n                        load_config\n                    )\n                    .expect(\"Failed to load the contract\");\n\n                    let response = loaded_contract.deploy_if_not_exists(\n                        &#wallet_name,\n                        ::fuels::types::transaction::TxPolicies::default()\n                    )\n                    .await\n                    .expect(\"Failed to deploy the contract\");\n\n                    #contract_struct_name::new(response.contract_id, #wallet_name.clone())\n                };\n            }\n        })\n        .reduce(|mut all_code, code| {\n            all_code.extend(code);\n            all_code\n        })\n        .unwrap_or_default()\n}\n\nfn script_loading_code(\n    commands: &[LoadScriptCommand],\n    project_lookup: &HashMap<String, Project>,\n) -> TokenStream {\n    commands\n        .iter()","sourceCodeStart":144,"sourceCodeEnd":180,"githubUrl":"https://github.com/FuelLabs/fuels-rs/blob/d9a250a51818dda64bfeb5ef7cc19cf27bdcd623/packages/fuels-macros/src/setup_program_test/code_gen.rs#L144-L180","documentation":"After loading, the setup_program_test! generated code calls loaded_contract.deploy_if_not_exists(&wallet, TxPolicies::default()).await and expects success. The panic means submission or execution of the deploy transaction failed on the local node.","triggerScenarios":"The local provider is not yet ready or crashed; the wallet lacks base assets to pay gas; the fuels crate and fuel-core node versions are mismatched so the deploy tx is rejected; transient startup flakiness of the local node.","commonSituations":"Race between provider startup and the first deploy; version skew after upgrading only one of fuels/fuel-core; resource-starved CI runners.","solutions":["Re-run the test to rule out a startup race, and check the node logs printed by the test helper","Verify fuels and fuel-core versions are paired (SDK version table)","Ensure wallets are funded (default setup funds them; custom configs may break this)","Switch to manual setup with proper error propagation to see the underlying error"],"exampleFix":"// before: macro-generated code\n// .await.expect(\"Failed to deploy the contract\") — hides the real error\n\n// after: manual deploy with the error surfaced\nlet response = loaded_contract\n    .deploy_if_not_exists(&wallet, fuels::types::transaction::TxPolicies::default())\n    .await?; // Returns the actual failure reason","handlingStrategy":"retry","validationCode":"// Health-check the node before deploying\nif provider.node_info().await.is_err() {\n    anyhow::bail!(\"local provider not ready — check node logs before deploying\");\n}","typeGuard":null,"tryCatchPattern":"// Retry with backoff to absorb local-node startup races\nlet mut attempt = 0;\nlet response = loop {\n    match loaded.deploy_if_not_exists(&wallet, TxPolicies::default()).await {\n        Ok(r) => break r,\n        Err(e) if attempt < 3 => {\n            attempt += 1;\n            tokio::time::sleep(std::time::Duration::from_millis(500)).await;\n        }\n        Err(e) => return Err(e.into()),\n    }\n};","preventionTips":["Wait for provider readiness (node_info) before the first deploy","Keep fuels/fuel-core versions paired so deploy txs are valid","Confirm wallets hold base assets before deploying","Retry flaky local-node deploys once before investigating"],"tags":["test-helpers","deployment","network","local-node"],"backgroundTag":null,"analyzedSha":"d9a250a51818dda64bfeb5ef7cc19cf27bdcd623","analyzedAt":"2026-08-16T09:49:30.618Z","schemaVersion":2},"datasetVersion":"2026-08-16T13:17:31.715Z"}