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https://github.com/kremalicious/metamask-extension.git
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90 lines
2.8 KiB
Markdown
90 lines
2.8 KiB
Markdown
# Transaction Controller
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Transaction Controller is an aggregate of sub-controllers and trackers
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exposed to the MetaMask controller.
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- txStateManager
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responsible for the state of a transaction and
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storing the transaction
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- pendingTxTracker
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watching blocks for transactions to be include
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and emitting confirmed events
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- txGasUtil
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gas calculations and safety buffering
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- nonceTracker
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calculating nonces
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## Flow diagram of processing a transaction
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## txMeta's & txParams
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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
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be a valid key and be hex prefixed except for the network number. Extra stuff must go on the txMeta!
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Here is a txMeta too look at:
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```js
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txMeta = {
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"id": 2828415030114568, // unique id for this txMeta used for look ups
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"time": 1524094064821, // time of creation
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"status": "confirmed",
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"metamaskNetworkId": "1524091532133", //the network id for the transaction
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"loadingDefaults": false, // used to tell the ui when we are done calculating gas defaults
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"txParams": { // the txParams object
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"from": "0x8acce2391c0d510a6c5e5d8f819a678f79b7e675",
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"to": "0x8acce2391c0d510a6c5e5d8f819a678f79b7e675",
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"value": "0x0",
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"gasPrice": "0x3b9aca00",
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"gas": "0x7b0c",
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"nonce": "0x0"
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},
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"history": [
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{ // debug information
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"id": 2828415030114568,
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"time": 1524094064821,
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"status": "unapproved",
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"metamaskNetworkId": "1524091532133",
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"loadingDefaults": true,
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"txParams": {
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"from": "0x8acce2391c0d510a6c5e5d8f819a678f79b7e675",
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"to": "0x8acce2391c0d510a6c5e5d8f819a678f79b7e675",
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"value": "0x0"
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}
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},
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[{
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"op": "add",
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"path": "/txParams/gasPrice",
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"value": "0x3b9aca00"
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}]
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], // I've removed most of history for this
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"origin": "MetaMask", //debug
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"nonceDetails": {
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"params": {
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"highestLocallyConfirmed": 0,
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"highestSuggested": 0,
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"nextNetworkNonce": 0
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},
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"local": {
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"name": "local",
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"nonce": 0,
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"details": {
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"startPoint": 0,
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"highest": 0
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}
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},
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"network": {
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"name": "network",
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"nonce": 0,
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"details": {
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"baseCount": 0
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}
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}
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},
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"rawTx": "0xf86980843b9aca00827b0c948acce2391c0d510a6c5e5d8f819a678f79b7e67580808602c5b5de66eea05c01a320b96ac730cb210ca56d2cb71fa360e1fc2c21fa5cf333687d18eb323fa02ed05987a6e5fd0f2459fcff80710b76b83b296454ad9a37594a0ccb4643ea90", // used for rebroadcast
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"hash": "0xa45ba834b97c15e6ff4ed09badd04ecd5ce884b455eb60192cdc73bcc583972a",
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"submittedTime": 1524094077902 // time of the attempt to submit the raw tx to the network, used in the ui to show the retry button
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}
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```
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