app.py

# Don't trust me with cryptography.

from secp import PublicKey
from flask import Flask, request

from ledger import Ledger


# Ledger pubkey
ledger = Ledger("supersecretprivatekey")

app = Flask(__name__)

@app.route("/keys")
def keys():
    return ledger.get_pubkeys()

@app.route("/mint", methods=["POST"])
def mint():
    B_ = PublicKey(bytes.fromhex(request.json["x"]), raw=True)  # pubkey is compressed
    promise = ledger.mint(B_)
    return promise

@app.route("/split", methods=["POST"])
def split():
    proofs = request.json["proofs"]
    amount = request.json["amount"]
    output_data = request.json["output_data"]
    try:
        fst_promises, snd_promises = ledger.split(proofs, amount, output_data)
        return {"fst": fst_promises, "snd": snd_promises}
    except Exception as exc:
        return {"error": str(exc)}