ExWeb3 / elixir_ethers / 4ed65a5fe93e9eaee31414b007b86fec14e31511-PR-265

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Pull #265

github

Add EIP-191 personal message (personal_sign) support

Introduce Ethers.PersonalMessage with pure EIP-191 (version 0x45)
primitives — hash/1, recover/2, recover!/2 and verify/3 — plus a new
optional sign_message/2 signer callback implemented by the Local signer
(secp256k1) and the JsonRPC signer (personal_sign), exposed through
Ethers.sign_message/2 and Ethers.sign_message!/2.

Messages are treated as raw bytes exactly as given; 0x-prefixed strings
are signed as literal text, matching ethers.js string semantics. All
vectors are cross-checked against foundry's cast and anvil.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

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