[BitcoinCashKit/BitcoinCashKit]: Implement OP_SHA256

[chaintip]

Repository: BitcoinCashKit/BitcoinCashKit
Issue #106: Implement OP_SHA256

Implement OP_SHA256

Process

1. Create a new file, OP_{}.swift, under OP_CODEs directory.
2. Refer to CoreBitcoin/BTCScriptMachine and, Bitcoin Wiki or may-2018-reenabled-opcodes
3. Implement like other opcode source codes.

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Total Bounty: 0 BCH| ~ 0.00 USD

To claim this bounty, get a pull request merged with @chaintip fixes #106 in the creation comment.

Returned Tips:

• 0.00117696 BCH| ~ 0.48 USD from usatie returned 2 years ago.