{"record":{"id":"7232646c33c02579","repo":"nautechsystems/nautilus_trader","slug":"failed-to-register-dex-exchange-e","errorCode":null,"errorMessage":"Failed to register DEX exchange: {e}","messagePattern":"Failed to register DEX exchange: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/cli/src/blockchain/analyze.rs","lineNumber":269,"sourceCode":"    reset: bool,\n    require_existing_snapshot: bool,\n    checkpoint_blocks: &[u64],\n    skip_validation: bool,\n    snapshot_from_rpc: bool,\n) -> anyhow::Result<Vec<PoolAnalysisOutcome>> {\n    if snapshot_from_rpc {\n        validate_snapshot_from_rpc_options(from_block, reset, require_existing_snapshot)?;\n    }\n\n    let pool_address = validate_address(&pool_address)?;\n    let pool_identifier = PoolIdentifier::Address(Ustr::from(&pool_address.to_string()));\n\n    // Load only this pool into the cache rather than the whole DEX pool set (tens of thousands of\n    // pools on large DEXes); sync and profiling below operate on this single pool.\n    data_client\n        .register_dex_exchange_for_pool(dex_type, &pool_identifier)\n        .await\n        .map_err(|e| anyhow::anyhow!(\"Failed to register DEX exchange: {e}\"))?;\n\n    let checkpoints = if checkpoint_blocks.is_empty() {\n        vec![to_block]\n    } else {\n        normalize_checkpoints(checkpoint_blocks, to_block)\n    };\n    let Some(first_checkpoint) = checkpoints.first().copied() else {\n        anyhow::bail!(\"All --checkpoint-blocks exceed --to-block {to_block}\");\n    };\n\n    // Bounded-replay mode: a usable snapshot must already exist at or before the first checkpoint,\n    // otherwise the caller wants needs_bootstrap rather than a full creation-to-target bootstrap.\n    if require_existing_snapshot\n        && needs_bootstrap_before_target(data_client, &pool_identifier, first_checkpoint).await?\n    {\n        return Ok(vec![PoolAnalysisOutcome::NeedsBootstrap(\n            PoolNeedsBootstrapOutcome {\n                pool_address: pool_address.to_string(),","sourceCodeStart":251,"sourceCodeEnd":287,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/cli/src/blockchain/analyze.rs#L251-L287","documentation":"In `analyze_pool_with_client`, `register_dex_exchange_for_pool` registers the DEX exchange for a single pool in the data client before syncing and profiling. If the registration future returns an error (RPC failure, unsupported DEX, bad pool address), it is wrapped with this message.","triggerScenarios":"Calling pool analysis (`run_analyze_pool` / `run_analyze_pools`) where `data_client.register_dex_exchange_for_pool(dex_type, pool)` fails — wrong DEX type for the chain, malformed pool address, or the underlying RPC request errors while fetching pool/factory data.","commonSituations":"Typos or wrong-case DEX names that still pass case-insensitive lookup; pool contract that doesn't match the DEX's expected interface; unstable RPC endpoint during registration.","solutions":["Verify the pool address is a valid contract for the given chain and DEX.","Confirm the DEX type is supported for the chain (`get_supported_dexes_for_chain`).","Retry if the cause is an RPC/network error; use a reliable RPC endpoint.","Inspect the inner error text after the colon to see whether it's transport, contract, or validation related."],"exampleFix":"// before\nnautilus blockchain analyze-pool --chain base --dex uniswapv2 --pool 0xdeadbeef\n// after: use a real pool address on the chosen chain/DEX\nnautilus blockchain analyze-pool --chain base --dex uniswap-v2 --pool 0x<real-uniswap-v2-pool>","handlingStrategy":"try-catch","validationCode":"assert!(get_supported_dexes_for_chain(chain.name).contains(&dex_type));\nassert!(pool_address.starts_with(\"0x\") && pool_address.len() == 42);","typeGuard":null,"tryCatchPattern":"match analyze_pool_with_client(...).await {\n    Ok(r) => r,\n    Err(e) if e.to_string().contains(\"Failed to register DEX exchange\") => {\n        // inspect {e:#} root cause; verify pool address and DEX type, then retry\n    }\n    Err(e) => return Err(e),\n}","preventionTips":["Validate pool address and DEX/chain combination before launching analysis.","Use a reliable RPC endpoint; log the inner error chain with {e:#}."],"tags":["blockchain","rpc","dex","cli"],"backgroundTag":"api-request-failed","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}