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mirror of https://github.com/kremalicious/metamask-extension.git synced 2024-12-13 13:17:13 +01:00
metamask-extension/app/scripts/controllers/transactions
2018-07-24 14:16:37 -07:00
..
lib lint - fix recipient-blacklist.js 2018-06-15 11:07:56 -07:00
index.js controllers - transaction - prefer log over console 2018-06-12 12:08:06 -07:00
nonce-tracker.js Remove unsued nonce tracker function 2018-06-25 15:01:14 -07:00
pending-tx-tracker.js metamask - ensure all nonce locks are released 2018-06-12 11:51:35 -07:00
README.md Cleaned up some typos and JSDocs in Transactions 2018-04-23 09:43:18 -07:00
tx-gas-utils.js tx-gas-utils - catch all errors from gas estimation 2018-07-24 14:16:37 -07:00
tx-state-manager.js trandsactions - remove rejected transactions from history 2018-06-25 15:07:54 -07:00

Transaction Controller

Transaction Controller is an aggregate of sub-controllers and trackers exposed to the MetaMask controller.

  • txStateManager responsible for the state of a transaction and storing the transaction
  • pendingTxTracker watching blocks for transactions to be include and emitting confirmed events
  • txGasUtil gas calculations and safety buffering
  • nonceTracker calculating nonces

Flow diagram of processing a transaction

transaction-flow

txMeta's & txParams

A txMeta is the "meta" object it has all the random bits of info we need about a transaction on it. txParams are sacred every thing on txParams gets signed so it must be a valid key and be hex prefixed except for the network number. Extra stuff must go on the txMeta!

Here is a txMeta too look at:

txMeta = {
  "id": 2828415030114568, // unique id for this txMeta used for look ups
  "time": 1524094064821, // time of creation
  "status": "confirmed",
  "metamaskNetworkId": "1524091532133", //the network id for the transaction
  "loadingDefaults": false, // used to tell the ui when we are done calculatyig gass defaults
  "txParams": { // the txParams object
    "from": "0x8acce2391c0d510a6c5e5d8f819a678f79b7e675",
    "to": "0x8acce2391c0d510a6c5e5d8f819a678f79b7e675",
    "value": "0x0",
    "gasPrice": "0x3b9aca00",
    "gas": "0x7b0c",
    "nonce": "0x0"
  },
  "history": [{ //debug
            "id": 2828415030114568,
            "time": 1524094064821,
            "status": "unapproved",
            "metamaskNetworkId": "1524091532133",
            "loadingDefaults": true,
            "txParams": {
              "from": "0x8acce2391c0d510a6c5e5d8f819a678f79b7e675",
              "to": "0x8acce2391c0d510a6c5e5d8f819a678f79b7e675",
              "value": "0x0"
            }
          },
          [
            {
              "op": "add",
              "path": "/txParams/gasPrice",
              "value": "0x3b9aca00"
            },
            ...], // I've removed most of history for this
  "gasPriceSpecified": false, //whether or not the user/dapp has specified gasPrice
  "gasLimitSpecified": false, //whether or not the user/dapp has specified gas
  "estimatedGas": "5208",
  "origin": "MetaMask", //debug
  "nonceDetails": {
    "params": {
      "highestLocallyConfirmed": 0,
      "highestSuggested": 0,
      "nextNetworkNonce": 0
    },
    "local": {
      "name": "local",
      "nonce": 0,
      "details": {
        "startPoint": 0,
        "highest": 0
      }
    },
    "network": {
      "name": "network",
      "nonce": 0,
      "details": {
        "baseCount": 0
      }
    }
  },
  "rawTx": "0xf86980843b9aca00827b0c948acce2391c0d510a6c5e5d8f819a678f79b7e67580808602c5b5de66eea05c01a320b96ac730cb210ca56d2cb71fa360e1fc2c21fa5cf333687d18eb323fa02ed05987a6e5fd0f2459fcff80710b76b83b296454ad9a37594a0ccb4643ea90", // used for rebroadcast
  "hash": "0xa45ba834b97c15e6ff4ed09badd04ecd5ce884b455eb60192cdc73bcc583972a",
  "submittedTime": 1524094077902 // time of the attempt to submit the raw tx to the network, used in the ui to show the retry button
}