Verify Ethereum signatures and SIWE messages in PHP.
npx skills add https://github.com/proofoftom/waap-drupal --skill ethereum-php-verify
Please help me install this Agent Skill. Skill: ethereum-php-verify Source: https://github.com/proofoftom/waap-drupal/tree/main/.claude/skills/ethereum-php-verify Command: npx skills add https://github.com/proofoftom/waap-drupal --skill ethereum-php-verify
This Skill helps PHP and Drupal projects verify Ethereum signatures, enabling Sign-In with Ethereum (SIWE) based authentication, address validation, and secure wallet verification.
Install the required composer packages and run a sample script that verifies a signature against a known address to authenticate a user.
High-intent search queries and answers about installing and using this skill.
Verify Ethereum signatures in PHP by validating EIP-4361 SIWE messages and EIP-191 personal_sign payloads to authenticate wallet users. This requires the kornrunner/keccak and simplito/elliptic-php composer packages to handle ECDSA recovery and address checksums.
Yes, you can implement Sign-In with Ethereum in Drupal by validating EIP-4361 SIWE messages and EIP-191 personal_sign signatures. This adds secure wallet authentication and address validation flows to existing PHP applications.
Validating EIP-191 personal_sign signatures in PHP requires the kornrunner/keccak and simplito/elliptic-php composer packages. These libraries enable keccak hashing and elliptic curve ECDSA recovery ID normalization.
EIP-55 address checksum verification in PHP validates the mixed-case checksum of an Ethereum address. This ensures the address integrity during login, auditing, or onboarding workflows by confirming the recovered signature address matches the expected checksum format.
Parsing and validating EIP-4361 SIWE messages in PHP involves extracting message fields and verifying the wallet signature against a known address. This approach enables secure onboarding and auditing workflows without relying on external JavaScript verification.
Normalizing recovery IDs during Ethereum ECDSA signature verification in PHP ensures the correct public key is recovered from the signature. This normalization step is essential for accurate address derivation and successful EIP-191 or SIWE authentication.
klu-devCorrect Ethereum data hashing to Keccak-256 in JavaScript and TypeScript.
proofoftomDebugs Sw/WE-style frontend sign-in flows by verifying message consistency across steps.
DFlowProtocolControl Phantom wallets via MCP to retrieve addresses, transfer tokens, and sign transactions.
NethereumSigns and verifies Ethereum messages using Netbeans libraries with EC2 key management.
