Wallet nonce is negative if it has never been used before on a chain

[fengtality]

Describe the bug

If a users tries to use Gateway to send transactions with a wallet that has never been used before on a chain, Gateway throws errors because it tried to apply a negative nonce.

Steps To Reproduce

• Use a new wallet on a chain
• Approve a token, and get error

{
    "message": "Unknown error.",
    "httpErrorCode": 503,
    "errorCode": 1099,
    "stack": "Error: invalid hexlify value [ See: https://links.ethers.org/v5-errors-NUMERIC_FAULT ] (operation=\"checkSafeInteger\", fault=\"out-of-safe-range\", value=-1, code=NUMERIC_FAULT, version=bytes/5.7.0)\n    at Logger.makeError (/Users/feng/Code/gateway/node_modules/@ethersproject/wallet/node_modules/@ethersproject/logger/lib/index.js:238:21)\n    at Logger.throwError (/Users/feng/Code/gateway/node_modules/@ethersproject/wallet/node_modules/@ethersproject/logger/lib/index.js:247:20)\n    at Logger.checkSafeUint53 (/Users/feng/Code/gateway/node_modules/@ethersproject/wallet/node_modules/@ethersproject/logger/lib/index.js:285:18)\n    at hexlify (/Users/feng/Code/gateway/node_modules/@ethersproject/wallet/node_modules/@ethersproject/bytes/lib/index.js:151:16)\n    at /Users/feng/Code/gateway/node_modules/@ethersproject/wallet/node_modules/@ethersproject/transactions/lib/index.js:181:59\n    at Array.forEach (<anonymous>)\n    at _serialize (/Users/feng/Code/gateway/node_modules/@ethersproject/wallet/node_modules/@ethersproject/transactions/lib/index.js:175:23)\n    at serialize (/Users/feng/Code/gateway/node_modules/@ethersproject/wallet/node_modules/@ethersproject/transactions/lib/index.js:246:16)\n    at /Users/feng/Code/gateway/node_modules/@ethersproject/wallet/lib/index.js:163:116\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)"
}

• Run /evm/nonce route:

{
    "nonce": -2
}

Proposed fix

Adjust /evm/nonce so that it is floored at 0 and make corresponding adjustments to nextNonce, etc

[fengtality]

Workaround: execute a transaction with the wallet using DEX interface, like wrapping a token. Afterwards, Gateway will compute the nonce correctly.