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Merged
merged 2 commits into from
May 14, 2025
Merged

Add burn verifier #57

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87fc29b
feat: add burn verifier
furkan-ux May 13, 2025
3692739
solidity verifier
furkan-ux May 13, 2025
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Binary file added circom/build/burn/burn.wasm
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Binary file added circom/build/burn/burn.zkey
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184 changes: 184 additions & 0 deletions circom/build/burn/burn_verification_key.json
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Original file line number Diff line number Diff line change
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{
"protocol": "groth16",
"curve": "bn128",
"nPublic": 19,
"vk_alpha_1": [
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"1"
],
"vk_beta_2": [
[
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],
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],
[
"1",
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]
],
"vk_gamma_2": [
[
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],
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],
[
"1",
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]
],
"vk_delta_2": [
[
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],
[
"1",
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"vk_alphabeta_12": [
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]
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],
"IC": [
[
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]
}
82 changes: 82 additions & 0 deletions circom/burn.circom
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pragma circom 2.1.9;

include "./components.circom";

template BurnCircuit () {
signal input ValueToBurn;

signal input SenderPrivateKey;
signal input SenderPublicKey[2];
signal input SenderBalance;
signal input SenderBalanceC1[2];
signal input SenderBalanceC2[2];

signal input SenderVTBC1[2];
signal input SenderVTBC2[2];

signal input AuditorPublicKey[2];
signal input AuditorPCT[4];
signal input AuditorPCTAuthKey[2];
signal input AuditorPCTNonce;
signal input AuditorPCTRandom;

// Verify that the transfer amount is less than or equal to the sender's balance and is less than the base order
var baseOrder = 2736030358979909402780800718157159386076813972158567259200215660948447373041;

component bitCheck1 = Num2Bits(252);
bitCheck1.in <== ValueToBurn;

component bitCheck2 = Num2Bits(252);
bitCheck2.in <== baseOrder;

component lt = LessThan(252);
lt.in[0] <== ValueToBurn;
lt.in[1] <== baseOrder;
lt.out === 1;

component bitCheck3 = Num2Bits(252);
bitCheck3.in <== SenderBalance + 1;

component checkValue = LessThan(252);
checkValue.in[0] <== ValueToBurn;
checkValue.in[1] <== SenderBalance + 1;
checkValue.out === 1;


// Verify that the sender's public key is well-formed
component checkSenderPK = CheckPublicKey();
checkSenderPK.privKey <== SenderPrivateKey;
checkSenderPK.pubKey[0] <== SenderPublicKey[0];
checkSenderPK.pubKey[1] <== SenderPublicKey[1];

// Verify that the sender's encrypted balance is well-formed
component checkSenderBalance = CheckValue();
checkSenderBalance.value <== SenderBalance;
checkSenderBalance.privKey <== SenderPrivateKey;
checkSenderBalance.valueC1[0] <== SenderBalanceC1[0];
checkSenderBalance.valueC1[1] <== SenderBalanceC1[1];
checkSenderBalance.valueC2[0] <== SenderBalanceC2[0];
checkSenderBalance.valueC2[1] <== SenderBalanceC2[1];

// Verify that the sender's encrypted value to burn is the burn amount
component checkSenderVTB = CheckValue();
checkSenderVTB.value <== ValueToBurn;
checkSenderVTB.privKey <== SenderPrivateKey;
checkSenderVTB.valueC1[0] <== SenderVTBC1[0];
checkSenderVTB.valueC1[1] <== SenderVTBC1[1];
checkSenderVTB.valueC2[0] <== SenderVTBC2[0];
checkSenderVTB.valueC2[1] <== SenderVTBC2[1];

// Verify auditor's encrypted summary includes the burn amount and is encrypted with the auditor's public key
component checkAuditorPCT = CheckPCT();
checkAuditorPCT.publicKey[0] <== AuditorPublicKey[0];
checkAuditorPCT.publicKey[1] <== AuditorPublicKey[1];
checkAuditorPCT.pct <== AuditorPCT;
checkAuditorPCT.authKey[0] <== AuditorPCTAuthKey[0];
checkAuditorPCT.authKey[1] <== AuditorPCTAuthKey[1];
checkAuditorPCT.nonce <== AuditorPCTNonce;
checkAuditorPCT.random <== AuditorPCTRandom;
checkAuditorPCT.value <== ValueToBurn;
}

component main { public [ SenderPublicKey, AuditorPublicKey, SenderBalanceC1, SenderBalanceC2, SenderVTBC1, SenderVTBC2, AuditorPCT, AuditorPCTAuthKey, AuditorPCTNonce ] } = BurnCircuit();
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