Datasets:
| # ledger.m — MANTRA example: transaction seal | |
| @deterministic | |
| define seal(tx) | |
| begin | |
| let id_bytes = integer_to_bytes(tx.id, 8) | |
| let acct_bytes = integer_to_bytes(tx.account, 8) | |
| let amt_bytes = integer_to_bytes(tx.amount, 16) | |
| let prev = hex_to_bytes(tx.previous_hash) | |
| let payload = concat(id_bytes, concat(acct_bytes, concat(amt_bytes, prev))) | |
| return sha256_hex(payload) | |
| end | |
| const tx = { | |
| id: 12345, | |
| account: 98765, | |
| amount: 125000, | |
| currency: "USD", | |
| timestamp: 1690000000, | |
| previous_hash: "0000000000000000000000000000000000000000000000000000000000000000" | |
| } | |
| const seal_hex = seal(tx) | |