HF7 @ 36050

[aerth]

Activate EIP155 and EIP158, Byzantine HF

This should have made it into HF6 but now can be tested before merge and next release.

EIP155 replay protection, Chain ID: 61717561

Spurious Dragon, aka State-clearing, EIP 158/161, was released in Nov 2016. Spurious Dragon is aiming for Dapp developers as well as end users for limited categories of applications, and had a number of security enhancements.

With Byzantine HF:

Addition of ‘REVERT’ opcode, which permits error handling without consuming all gas (EIP 140)

Transaction receipts now include a status field to indicate success or failure EIP 658)

Elliptic curve addition and scalar multiplication on alt_bn128 (EIP 196) and pairing checks (EIP 197), permitting ZK-Snarks and other cryptographic mathemagic™

Support for big integer modular exponentiation (EIP 198), enabling RSA signature verification and other cryptographic applications

Support for variable length return values (EIP 211)

Addition of the ‘STATICCALL’ opcode, permitting non-state-changing calls to other contracts (EIP 214)