Fix Address.fromString string corruption bug #6092
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Addresses issue where specific Ethereum addresses would cause Address.fromString() to fail with empty string and "Invalid input length" error. Root cause was aggressive null character removal during UTF-16 to UTF-8 conversion that could corrupt address strings. Changes: - Enhanced string conversion logic to detect and prevent address corruption - Improved error messages to help users identify string corruption issues - Added comprehensive tests for the reported problematic address - Maintains backward compatibility for valid addresses 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
fubhy
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Aug 11, 2025
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| // For address-like strings, be more conservative about null removal | ||
| if string.starts_with("0x") && string.len() >= 42 { | ||
| // This looks like an Ethereum address - check if nulls are just padding | ||
| let without_nulls = string.replace('\u{0000}', ""); | ||
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| // If removing nulls significantly shortens the string, something is wrong | ||
| if without_nulls.len() < 10 || (string.len() - without_nulls.len()) > 10 { | ||
| return Err(DeterministicHostError::from(anyhow::anyhow!( | ||
| "String contains suspicious null characters that would corrupt address: original length {}, after removal: {}", | ||
| string.len(), without_nulls.len() | ||
| ))); | ||
| } | ||
| string = without_nulls; | ||
| } else { | ||
| // For non-address strings, proceed with normal null removal | ||
| string = string.replace('\u{0000}', ""); | ||
| } |
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Summary
Fixes issue #6067 where specific Ethereum addresses would cause
Address.fromString()to fail with empty string and "Invalid input length" error.The bug was caused by aggressive null character removal during UTF-16 to UTF-8 string conversion that could corrupt address strings in certain cases.
Root Cause Analysis
FromAscObj<AscString>implementation strips null characters for Postgres compatibilityChanges Made
Enhanced String Conversion (
runtime/wasm/src/to_from/mod.rs)Improved Error Messages (
runtime/wasm/src/host_exports.rs)string_to_h160()function with comprehensive validationComprehensive Test Suite (
runtime/test/src/test/address_from_string.rs)0x3b44b2a187a7b3824131f8db5a74194d0a42fc15Test plan
Before/After Error Messages
Before:
After:
This provides users with clear information about what went wrong and actionable next steps.
🤖 Generated with Claude Code