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const txHash = mimc7.multiHash(
[tx.from[0], tx.from[1], BigInt(tx.detail), tx.updated_pubkey[0], tx.updated_pubkey[1]]
)
const signature = eddsa.signMiMC(alicePrvKey, txHash)
// update Alice account
const newAlice = {
pubkey: tx.updated_pubkey,
detail: BigInt(tx.detail)
}
const newAliceHash = mimc7.multiHash(
[newAlice.pubkey[0], newAlice.pubkey[1], BigInt(newAlice.detail)]
)
// update root
const final_root = mimc7.multiHash([newAliceHash, bobHash])
// console.log('tree_root: ' + tree_root.toString())
// console.log('final_root: ' + final_root.toString())
// console.log('accounts_pubkeys Alice.pubkey[0]: ' + Alice.pubkey[0].toString())
// console.log('accounts_pubkeys Alice.pubkey[1]: ' + Alice.pubkey[1].toString())
// console.log('accounts_detail: ' + final_root.toString())
// console.log('sender_detail: ' + Alice.detail.toString())
// console.log('sender_updated_pubkey[0]: ' + newAlice.pubkey[0].toString())
// console.log('sender_updated_pubkey[1]: ' + newAlice.pubkey[1].toString())
// console.log('sender_updated_detail: ' + newAlice.detail.toString())
// console.log("signature['R8'][0]: " + signature.R8[0].toString())
// console.log("signature['R8'][1]: " + signature.R8[1].toString())
// console.log("signature['S']: " + signature.S.toString())
// console.log('aliceHash: ' + aliceHash.toString())
// console.log('bobHash: ' + bobHash.toString())
// console.log('newAliceHash: ' + newAliceHash.toString())
console.log('Submitted initial message')
// Wait 10 seconds
console.log('Sleeping 10 seconds...')
await sleep(10000)
console.log('Woken up')
// Construct 2nd message
const userSecondMessage = [
...userPosition,
...userPubKey,
1n // New position
]
const userSecondMessageHash = mimc7.multiHash(userSecondMessage)
const secondSignature: MiMicSignature = eddsa.signMiMC(
userPrvKey.toString(),
userSecondMessageHash
)
// Insert signature into tx
const userSecondMessage2 = [
...userSecondMessage,
secondSignature.R8[0],
secondSignature.R8[1],
secondSignature.S
]
const userSecondEncryptedMessage = encrypt(
userSecondMessage2,
detail: 0,
updated_pubkey: Alice.pubkey
}
// Alice sign tx
const txHash = mimc7.multiHash(
[tx.from[0], tx.from[1], BigInt(tx.detail), tx.updated_pubkey[0], tx.updated_pubkey[1]]
)
const signature = eddsa.signMiMC(alicePrvKey, txHash)
// update Alice account
const newAlice = {
pubkey: tx.updated_pubkey,
detail: BigInt(tx.detail)
}
const newAliceHash = mimc7.multiHash(
[newAlice.pubkey[0], newAlice.pubkey[1], BigInt(newAlice.detail)]
)
// update root
const final_root = mimc7.multiHash([newAliceHash, bobHash])
// console.log('tree_root: ' + tree_root.toString())
// console.log('final_root: ' + final_root.toString())
// console.log('accounts_pubkeys Alice.pubkey[0]: ' + Alice.pubkey[0].toString())
// console.log('accounts_pubkeys Alice.pubkey[1]: ' + Alice.pubkey[1].toString())
// console.log('accounts_detail: ' + final_root.toString())
// console.log('sender_detail: ' + Alice.detail.toString())
// console.log('sender_updated_pubkey[0]: ' + newAlice.pubkey[0].toString())
// console.log('sender_updated_pubkey[1]: ' + newAlice.pubkey[1].toString())
// console.log('sender_updated_detail: ' + newAlice.detail.toString())
// console.log("signature['R8'][0]: " + signature.R8[0].toString())
)
const tree_root = mimc7.multiHash([aliceHash, bobHash])
// transaction
const tx = {
from: Alice.pubkey,
detail: 0,
updated_pubkey: Alice.pubkey
}
// Alice sign tx
const txHash = mimc7.multiHash(
[tx.from[0], tx.from[1], BigInt(tx.detail), tx.updated_pubkey[0], tx.updated_pubkey[1]]
)
const signature = eddsa.signMiMC(alicePrvKey, txHash)
// update Alice account
const newAlice = {
pubkey: tx.updated_pubkey,
detail: BigInt(tx.detail)
}
const newAliceHash = mimc7.multiHash(
[newAlice.pubkey[0], newAlice.pubkey[1], BigInt(newAlice.detail)]
)
// update root
const final_root = mimc7.multiHash([newAliceHash, bobHash])
// console.log('tree_root: ' + tree_root.toString())
// console.log('final_root: ' + final_root.toString())
// console.log('accounts_pubkeys Alice.pubkey[0]: ' + Alice.pubkey[0].toString())
// Wait 10 seconds
console.log('Sleeping 10 seconds...')
await sleep(10000)
console.log('Woken up')
// Construct 2nd message
const userSecondMessage = [
...userPosition,
...userPubKey,
1n // New position
]
const userSecondMessageHash = mimc7.multiHash(userSecondMessage)
const secondSignature: MiMicSignature = eddsa.signMiMC(
userPrvKey.toString(),
userSecondMessageHash
)
// Insert signature into tx
const userSecondMessage2 = [
...userSecondMessage,
secondSignature.R8[0],
secondSignature.R8[1],
secondSignature.S
]
const userSecondEncryptedMessage = encrypt(
userSecondMessage2,
userPrvKey,
coordinatorPublicKey
const sign = (
privKey: PrivKey,
plaintext: Plaintext,
): Signature => {
// TODO: make these intermediate variables have more meaningful names
const h1 = bigInt2Buffer(mimcspongeHashOne(privKey))
// TODO: document these steps
const sBuff = eddsa.pruneBuffer(h1.slice(0, 32))
const s = snarkjs.bigInt.leBuff2int(sBuff)
const A = babyJub.mulPointEscalar(babyJub.Base8, s.shr(3))
debugger
const msgBuff = snarkjs.bigInt.leInt2Buff(
plaintext,
32
)
const rBuff = bigInt2Buffer(
mimcspongeHashOne(
buffer2BigInt(Buffer.concat(
[h1.slice(32, 64), msgBuff]
))
)
)
let r = snarkjs.bigInt.leBuff2int(rBuff)
const genPubKey = (privKey: PrivKey): PubKey => {
// Check whether privKey is a field element
assert(privKey < SNARK_FIELD_SIZE)
// TODO: check whether privKey is valid (i.e. that the prune buffer step
// worked)
const pubKey = babyJub.mulPointEscalar(
babyJub.Base8,
formatPrivKeyForBabyJub(privKey),
)
// TODO: assert that pubKey is valid
// TODO: figure out how to check if pubKey is valid
return pubKey
}
const sign = (prv: BigInt, _msg: BigInt): { R8: BigInt, S: BigInt } => {
// Doing this as bigInt2Buffer requires a custom
// methods 'greater' than isn't in the standard bigint
// object (its a snarkjs custom bigint obj method)
const msg = bigInt(_msg)
const h1 = bigInt2Buffer(hash(prv))
const sBuff = eddsa.pruneBuffer(h1.slice(0, 32))
const s = bigInt.leBuff2int(sBuff)
const A = babyJub.mulPointEscalar(babyJub.Base8, s.shr(3))
const msgBuff = bigInt.leInt2Buff(
msg,
32
)
const rBuff = bigInt2Buffer(hash(
buffer2BigInt(Buffer.concat(
[h1.slice(32, 64), msgBuff]
))
))
let r = bigInt.leBuff2int(rBuff)
r = r.mod(babyJub.subOrder)
const R8 = babyJub.mulPointEscalar(babyJub.Base8, r)
const hm = multiHash([R8[0], R8[1], A[0], A[1], msg])
const S = r.add(hm.mul(s)).mod(babyJub.subOrder)
function multiHash(arr) {
// TODO check bigints inside finite field
return mimc7.multiHash(arr);
}
const { Circuit } = require('snarkjs')
const zkSnark = require('snarkjs').original
const { unstringifyBigInts } = require('snarkjs/src/stringifybigint')
const alicePrvKey = Buffer.from('1'.toString().padStart(64, '0'), 'hex')
const alicePubKey = eddsa.prv2pub(alicePrvKey)
const bobPrvKey = Buffer.from('2'.toString().padStart(64, '0'), 'hex')
const bobPubKey = eddsa.prv2pub(bobPrvKey)
// accounts (1 = Yes, 0 = No)
const Alice = {
pubkey: alicePubKey,
detail: 1
}
const aliceHash = mimc7.multiHash(
[Alice.pubkey[0], Alice.pubkey[1], BigInt(Alice.detail)]
)
const Bob = {
pubkey: bobPubKey,
detail: 0
}
const bobHash = mimc7.multiHash(
[Bob.pubkey[0], Bob.pubkey[1], BigInt(Bob.detail)]
)
const tree_root = mimc7.multiHash([aliceHash, bobHash])
// transaction
const tx = {
from: Alice.pubkey,