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# StarkWare JSON-RPC Spec
JSON-RPC specification for wallet interaction for starkware methods
All examples use the parameters described in [testing environment](#Testing-Environment) section.
Finally all parameter types can be found in more detail [here](#Parameter-Types).
## Methods
### Connection (No Signature Involved)
### Get Account
The method `stark_account` will return the StarkPublicKey of registered account by the wallet.
#### Flow
#### Interface:
```typescript
// request
interface StarkAccountRequest {
id: number;
jsonrpc: "2.0";
method: "stark_account";
params: {
layer: string;
application: string;
index: string;
};
}
// response
interface StarkAccountResponse {
id: number;
jsonrpc: "2.0";
result: {
starkPublicKey: string;
};
}
```
#### Example:
Please notice that the starkKey in the test vectors are not derived from the path. This will be corrected.
Example with index `0`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_account",
"params": {
"layer": "starkex",
"application": "starkexdvf",
"index": "0"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"starkPublicKey":"0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
}
}
```
Example with index `1`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_account",
"params": {
"layer": "starkex",
"application": "starkexdvf",
"index": "1"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"starkPublicKey": "0x397e76d1667c4454bfb83514e120583af836f8e32a516765497823eabe16a3f",
}
}
```
### Register Account
The method `stark_register` will register the active Ethereum wallet to the StarkExchange and return the transaction hash of the submitted registration on-chain.
#### Flow
#### Interface:
```typescript
// request
interface StarkRegisterRequest {
id: number;
jsonrpc: "2.0";
method: "stark_register";
params: {
contractAddress: string;
starkPublicKey: string;
operatorSignature: string;
};
}
// response
interface StarkRegisterResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Example:
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_register",
"params": {
"contractAddress": "0xC5273AbFb36550090095B1EDec019216AD21BE6c",
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"operatorSignature": "0xae50f29764c96ff5d1554f1d0605bdb992a62700eb8a0b2ffd711da6d6fd90781dbfbb8918c98c15e9fd6251ad89d55e30c20060cf300b51929129726718b6711c"
},
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0xbcbb3845cfa1252e43228c76745c1366ccf43b70e01ab0f81d3f166ac045e627"
}
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"nonce": "0"
}
```
### Deposit Asset
The method `stark_deposit` will request a deposit of an asset into provided vaultId and will return the transaction hash of the submitted deposit on-chain.
#### Flow
#### Interface:
```typescript
// request
interface StarkDepositRequest {
id: number;
jsonrpc: "2.0";
method: "stark_deposit";
params: {
contractAddress: string;
starkPublicKey: string;
vaultId: string;
token: Token;
quantizedAmount: string;
};
}
// response
interface StarkDepositResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Example:
Example with token type `ERC20`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_deposit",
"params": {
"contractAddress": "0xC5273AbFb36550090095B1EDec019216AD21BE6c",
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"vaultId": "15",
"token": {
"quantum": "1",
"tokenAddress": "0x89b94e8C299235c00F97E6B0D7368E82d640E848"
},
"quantizedAmount": "10"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0xffe915f46a9953e486cfbd1a6d581da69ce122cc31e49500a8b8422e61bd2374"
}
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"tokenId": "0x129b06238c61f34d4c4ffb5ad469c7b24001810d876f78e4f1ae0010f882315",
"nonce": "2"
}
```
Example with token type `ETH`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_deposit",
"params": {
"contractAddress": "0x3EaD5582681dA76d0BF28E0D241277A5D797E293",
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"vaultId": "15",
"token": {
"quantum": "2"
}
"quantizedAmount": "20"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0x8e450d96e4b91b2f3a5ef0baf3cb30bab579bcf5e781129594f62a5a3bd091de"
}
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"tokenId": "0x1169799835a38e104a8147cf0380d0294d62273c2250343d71f4ea9aa397ba7",
"nonce": "6"
}
```
### Deposit Cancel
The method `stark_depositCancel` will request a cancelation of a deposit made to the contract on-chain and will return the transaction hash of the submitted deposit cancelation on-chain.
#### Flow
#### Interface:
```typescript
// request
interface StarkDepositCancelRequest {
id: number;
jsonrpc: "2.0";
method: "stark_depositCancel";
params: {
contractAddress: string;
starkPublicKey: string;
vaultId: string;
token: Token;
};
}
// response
interface StarkDepositCancelResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Example:
Example with token type `ERC20`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_depositCancel",
"params": {
"contractAddress": "0xC5273AbFb36550090095B1EDec019216AD21BE6c",
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"vaultId": "15",
"token": {
"quantum": "1",
"tokenAddress": "0x89b94e8C299235c00F97E6B0D7368E82d640E848"
},
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0xd5f57792eb476382f6bd2bd576c9bc1b85eae8112af912df25e713e5bda377ee"
},
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"tokenId": "0x129b06238c61f34d4c4ffb5ad469c7b24001810d876f78e4f1ae0010f882315",
"nonce": "3"
}
```
### Deposit Reclaim
The method `stark_depositReclaim` will request a reclaim of a canceled deposit made to the contract on-chain and will return the transaction hash of the submitted deposit reclaim on-chain.
#### Flow
#### Interface:
```typescript
// request
interface StarkDepositReclaimRequest {
id: number;
jsonrpc: "2.0";
method: "stark_depositReclaim";
params: {
contractAddress: string;
starkPublicKey: string;
vaultId: string;
token: Token;
};
}
// response
interface StarkDepositCancelResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Example:
Example with token type `ERC20`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_depositReclaim",
"params": {
"contractAddress": "0xC5273AbFb36550090095B1EDec019216AD21BE6c",
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"vaultId": "15",
"token": {
"quantum": "1",
"tokenAddress": "0x89b94e8C299235c00F97E6B0D7368E82d640E848"
},
},
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0x745b0ae5403af8b5e5ec4a6db3c0951dc127019652af63001d00e5c6f436f500"
},
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"tokenId": "0x129b06238c61f34d4c4ffb5ad469c7b24001810d876f78e4f1ae0010f882315",
"nonce": "4"
}
```
### Transfer Asset
This method `stark_transfer` will request an asset transfer off-chain and will return a stark signature approved by the wallet.
#### Flow
#### Interface:
```typescript
// request
interface StarkTransferRequest {
id: number;
jsonrpc: "2.0";
method: "stark_transfer";
params: {
contractAddress: string;
from: TransferParams;
to: TransferParams;
token: Token;
quantizedAmount: string;
nonce: string;
expirationTimestamp: string;
};
}
// response
interface StarkTransferResponse {
id: number;
jsonrpc: "2.0";
result: {
starkSignature: string;
};
}
// TransferParams
interface TransferParams {
starkPublicKey: string;
vaultId: string;
}
```
#### Example:
Example with token type `ERC20`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_transfer",
"params": {
"contractAddress": "0xC5273AbFb36550090095B1EDec019216AD21BE6c",
"from": {
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"vaultId": "34"
},
"to": {
"starkPublicKey": "0x5fa3383597691ea9d827a79e1a4f0f7949435ced18ca9619de8ab97e661020",
"vaultId": "21"
},
"token": {
"quantum": "",
"tokenAddress": ""
},
"quantizedAmount": "2154549703648910716",
"nonce": "1",
"expirationTimestamp": "438953"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"starkSignature": "0x735fffa9bf371ca294c5f74c15b434684cfe7e9e0500e6a59589ef05c1fce131593b9496b7572f7bae8028c66405e3d76132723affdb5e4e76aadb8c2ae04f"
}
}
// context
{
"transfer_order": {
"message_hash": "0x6366b00c218fb4c8a8b142ca482145e8513c78e00faa0de76298ba14fc37ae7",
"private_key": "0x7cc2767a160d4ea112b436dc6f79024db70b26b11ed7aa2cb6d7eef19ace703",
"tokenId": "0x3003a65651d3b9fb2eff934a4416db301afd112a8492aaf8d7297fc87dcd9f4",
"order_id": "7162605823528514760"
}
}
```
### Create Limit Order
This method `stark_createOrder` will request the creation of a limit order off-chain and will return a stark signature approved by the wallet.
#### Flow
#### Interface:
```typescript
// request
interface StarkCreateOrderRequest {
id: number;
jsonrpc: "2.0";
method: "stark_createOrder";
params: {
contractAddress: string;
starkPublicKey: string;
sell: OrderParams;
buy: OrderParams;
nonce: string;
expirationTimestamp: string;
};
}
// response
interface StarkCreateOrderResponse {
id: number;
jsonrpc: "2.0";
result: {
starkSignature: string;
};
}
// OrderParams
interface OrderParams {
vaultId: string;
token: Token;
quantizedAmount: string;
}
```
#### Example:
Example with token type `ERC20`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_createOrder",
"params": {
"contractAddress": "0xC5273AbFb36550090095B1EDec019216AD21BE6c",
"starkPublicKey": "0x77a3b314db07c45076d11f62b6f9e748a39790441823307743cf00d6597ea43",
"sell": {
"vaultId": "21",
"token": {
"quantum": "",
"tokenAddress": ""
},
"quantizedAmount": "2154686749748910716",
},
"buy": {
"vaultId": "27",
"token": {
"quantum": "",
"tokenAddress": ""
},
"quantizedAmount": "1470242115489520459",
},
"nonce": "0",
"expiration_timestamp": "438953"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"starkSignature": "0x173fd03d8b008ee7432977ac27d1e9d1a1f6c98b1a2f05fa84a21c84c44e8821f2c44a7798f55192f153b4c48ea5c1241fbb69e6132cc8a0da9c5b62a4286e"
}
}
// context
{
"token_sell": "0x5fa3383597691ea9d827a79e1a4f0f7989c35ced18ca9619de8ab97e661020",
"token_buy": "0x774961c824a3b0fb3d2965f01471c9c7734bf8dbde659e0c08dca2ef18d56a",
"message_hash": "0x397e76d1667c4454bfb83514e120583af836f8e32a516765497823eabe16a3f",
"private_key": "0x3c1e9550e66958296d11b60f8e8e7a7ad990d07fa65d5f7652c4a6c87d4e3cc",
"order_id": "4142879348967097428"
}
```
### Offchain Withdraw Asset (No Signature Involved)
#### Flow
### Withdraw Asset
This method `stark_withdrawal` will request the withdrawal of an asset on-chain and will return the transaction hash of the submitted withdrawal on-chain.
#### Flow
#### Interface:
```typescript
// request
interface StarkWithdrawalRequest {
id: number;
jsonrpc: "2.0";
method: "stark_withdrawal";
params: {
contractAddress: string;
token: Token;
};
}
// response
interface StarkWithdrawalResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Example:
Example with token type `ERC20`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_withdrawal",
"params": {
"contractAddress": "0x48C5c08aD49Fc8Dc657cD3b2964c8db187FB0481",
"token": {
"quantum": "1",
"tokenAddress": "0x0a7183b53E571771A0e93fda170F2F0549C1C112"
}
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0x980a05d8199bad8c6e2012ed587007a094477849c559bdeb45256c88bd29de11"
}
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"tokenId": "0x29673464669bbf2b94a5b83997ab37083a436ab0e14eb7f3bbae26f6acfb0c3",
"nonce": "47"
}
```
Example with token type `ETH`
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_withdrawal",
"params": {
"contractAddress": "0xBBC8C5481d1C992D8a974deC23C7CE93D679c5C9",
"token": {
"quantum": "2"
}
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0x9302e5cca1df63755574d59653cee56f5a1abdae2e68f9802b3103d686eca9b1"
}
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"tokenId": "0x1169799835a38e104a8147cf0380d0294d62273c2250343d71f4ea9aa397ba7",
"nonce": "49"
}
```
### Full Withdrawal Vault
This method `stark_fullWithdrawal` will request the full withdrawal of an off-chain vault and will return the transaction hash of the submitted full withdrawal call on-chain.
#### Interface:
```typescript
// request
interface StarkFullWithdrawalRequest {
id: number;
jsonrpc: "2.0";
method: "stark_fullWithdrawal";
params: {
contractAddress: string;
vaultId: string;
};
}
// response
interface StarkFullWithdrawalResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Example:
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_fullWithdrawal",
"params": {
"contractAddress": "0x7a402427ef5Ae1489f78457c4086c4AFC743C0A6",
"vaultId": "3"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0xfc83a1a6a7461d185d6d44e5e474f1c764a9486afcc83aeaeb204a63a42032ad"
}
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"nonce": "27"
}
```
### Freeze Contract
This method `stark_freeze` will request the freeze of the contract and will return the transaction hash of the submitted freeze call on-chain.
#### Interface:
```typescript
// request
interface StarkFreezeRequest {
id: number;
jsonrpc: "2.0";
method: "stark_freeze";
params: {
contractAddress: string;
vaultId: string;
};
}
// response
interface StarkFreezeResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Example:
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_freeze",
"params": {
"contractAddress": "0x7a402427ef5Ae1489f78457c4086c4AFC743C0A6",
"vaultId": "3"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0xc8a0c0ed72ae6c563b323e9add29cfd93d5cb969de6ca35977177a332b04ce3e"
}
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"nonce": "28"
}
```
### Verify Escape
This method `stark_verifyEscape` will provide the proof for the escape.
#### Interface:
```typescript
// request
interface StarkVerifyEscapeRequest {
id: number;
jsonrpc: "2.0";
method: "stark_verifyEscape";
params: {
contractAddress: string;
proof: string[];
};
}
// response
interface StarkVerifyEscapeResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Proof Example:
```typescript
[
"3533772073355067386033650359960199886012348633125689077279705636794314562180",
"31427047970345673757012126699659538045618813024120395264836621949253850585344",
"38422745836957834608116983367750831521285445816911862565695276884592698042000",
"304315052591732045568",
"5021233070011740680532843509854937350086963617043533754858001929304304713908",
"32155736778989711246139641295624962637243870965958022462125972080652534497792",
"13203959379647270763737907984337877465408570052216961167644315262077751997553",
"99178380692411026472028033088507445806378642651740782294144737044337542025216",
"41096826960538513883254143407052656057117074000340021784418716174389659231557",
"20894025957091018130975914799136784612345618353099487610481793900037168670976",
"18251823945812275100891062507945043843331907738106195624847294624094147801123",
"39788236641746273681192219618701072958562915240402801216846182424706903180288",
"29328978571202094277527814781829369302783146287684985903839654175183092286374",
"9547971168496630027159085375284032591104304239243265061311842428441357281536",
"15367341209460484926915011706811990839742029990620754383292727578245401624839",
"65863152087527643630760979846245293912224050302277023183218584961374256473088",
"43031299876771822810994762175630819583995224518603284296805054254223961987062",
"102281286572436279970261502605950462502557134758469363167896674198581213242368",
"7930124177266922047851329391857930031698461026641690743138123663250527601796",
"94058288424055442399218689458939771903324651137098105000531795197414869991168",
"30461703567431901577778719744785677768536102127535135100125713709474738922512",
"55331818438107551168030656993070349294087523151615815677720278987041386950912",
"28681604752224169308580973149418512744016796252869824801310913293671737342293",
"27521501820137038434738933575628806610034948832359813194967361110953896621312",
"33729936254926360650636714077882563458104590866223198957588813314090573553860",
"112981458493347365888441670126910368385171040632295426831013205661799583415296",
"33601314734054759151382622455835909471570339896179484333018895130522513956260",
"84941492823024391113008253711595948522919774265120122463208702935316561081344",
"27913283727448756400817779012588722060643535835072585846926497602945764628593",
"23843911218911412616022416346428858191238510945612840753080524741417649587456",
"35945622951149974419867838457132791983076054314545970292378049981584032392327",
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"29438076154735896033386510787429831760392375746397204767474333341701915038919",
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"46539515800707539708234594748732221433715112472560941969042733479345935926016",
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"66588869103233125697138455915048748559634675333045113002959081750047419538432",
"16256690868972993320553588836619957753922937561588711184975394157870786938337",
"47404132813467723873749319198853221000317107546617540626263770495344684789760",
"47492695803704426995925006548945632477876342811647241506620188891292026910454d59382415459231770651674570800404195153706389222417548955439914935238752731904",
"44257961116472514577570319949543081622868888821524063961470613156517112075472",
"574995603456",
];
```
### Escape
This method `stark_escape` will request the escape of a vault from a frozen contract and will return the transaction hash of the submitted escape.
#### Interface:
```typescript
// request
interface StarkEscapeRequest {
id: number;
jsonrpc: "2.0";
method: "stark_escape";
params: {
contractAddress: string;
starkPublicKey: string;
vaultId: string;
token: Token;
quantizedAmount: string;
};
}
// response
interface StarkEscapeResponse {
id: number;
jsonrpc: "2.0";
result: {
txhash: string;
};
}
```
#### Example:
```json
// request
{
"id": 1,
"jsonrpc": "2.0",
"method": "stark_escape",
"params": {
"contractAddress": "0x7a402427ef5Ae1489f78457c4086c4AFC743C0A6",
"starkPublicKey": "0x59a543d42bcc9475917247fa7f136298bb385a6388c3df7309955fcb39b8dd4",
"token": {
"quantum": "1000",
"tokenAddress": "0x485c1432F26CAc821Cf8070417Fa0EFeAB19Df83"
},
"quantizedmount": "8233298795789816600"
}
}
// response
{
"id": 1,
"jsonrpc": "2.0",
"result": {
"txhash": "0xd1e5a3b1bf7c4da9a4f12646cfc15b294e228eafe4225e9623927189fb8c65b2"
}
}
// context
{
"privateKey": "0x9a983cb3d832fbde5ab49d692b7a8bf5b5d232479c99333d0fc8e1d21f1b55b6",
"address": "0x6Fac4D18c912343BF86fa7049364Dd4E424Ab9C0",
"tokenId": "0x258061c0a4e86837f975b5a5df7c5b073f40a22d169cc10f84c6de33c18b73d",
"nonce": "30"
}
```
## Shared Interfaces
### Token
This specification expects tokens to be defined by the following interface
```typescript
interface Token
type: string;
data: ETHTokenData | ERC20TokenData | ERC721TokenData;
}
```
Token.data is conditional on the Token.type, examples:
For type `ETH`
```typescript
interface ETHTokenData {
quantum: string;
}
```
For type `ERC20`
```typescript
interface ERC20TokenData {
quantum: string;
tokenAddress: string;
}
```
For type `ERC721`
```typescript
interface ERC721TokenData {
tokenId: string;
tokenAddress: string;
}
```
## Parameter Types
| Name | Type | Bytes |
| ------------------- | ------- | ----- |
| contractAddress | bytes | 20 |
| index | uint32 | 4 |
| starkPublicKey | bytes | 32 |
| operatorSignature | bytes | 65 |
| txhash | bytes | 20 |
| vaultId | uint32 | 4 |
| quantum | uint256 | 32 |
| tokenAddress | bytes | 20 |
| quantizedAmount | uint64 | 8 |
| nonce | uint32 | 4 |
| expirationTimestamp | uint32 | 4 |
| starkSignature | bytes | 64 |
| proof | bytes | n |
> n = variable size
## StarkWare key derivation
Starkware keys are derived with the following BIP43-compatible derivation path, with direct inspiration from BIP44:
```
m / purpose' / layer' / application' / eth_address_1' / eth_address_2' / index
```
where:
* `m` - is the seed
* `purpose` - will be a number we define for this specific scheme
* `layer` - to allow other companies in the future to use this scheme if they want. will probably be the last 31 bits of h(starkware)
* `application` - to allow different applications. the last 31 bits of h(starkexdvf)
* `eth_address_1 / eth_address_2` - will be the first and second 31 lowest bits of the eth_address the user is currently using to interact with the exchange.
* `index` - to allow multiple keys per eth_address.
The key derivation should follow the following algorithm
```
N = secp256k1 curve order
n = stark252 curve order
path = stark derivation path
BIP32() = Official BIP-0032 derivation function on secp256k1
hash = SHA256
i = 0
root_key = BIP32(path)
while True:
key = hash(root_key|i)
if (key < (N - (N % n))):
return key % n
i++
```
This algorithm has been defined to maintain efficiency on existing restricted devices.
Nota Bene: At each round, the probability for a key to be greater than (N - (N % n)) is < 2^(-5).
## Testing Environment
All Ethereum keys were derived with the following BIP39-compatible seed phrase:
```
abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about
```
For testing purposes, the same seed phrase for both operator and user and the following parameters are used:
* Operator Address is at index 0
* User Address is at index 1
* Contract Address is at address 0x9c693c9b1c04ccd9f9249a02b301ba23d3c5cd82 (ropsten)
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