ethereumjs-vm
Version:
An Ethereum VM implementation
69 lines • 2.41 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var async = require('async');
/**
* @ignore
*/
function runBlockchain(blockchain) {
var _this = this;
return new Promise(function (resolve, reject) {
var self = _this;
var headBlock;
var parentState;
blockchain = blockchain || _this.blockchain;
// setup blockchain iterator
blockchain.iterator('vm', processBlock, function (err) {
if (err) {
reject(err);
}
else {
resolve();
}
});
function processBlock(block, reorg, cb) {
async.series([getStartingState, runBlock], cb);
// determine starting state for block run
function getStartingState(cb) {
// if we are just starting or if a chain re-org has happened
if (!headBlock || reorg) {
blockchain.getBlock(block.header.parentHash, function (err, parentBlock) {
parentState = parentBlock.header.stateRoot;
// generate genesis state if we are at the genesis block
// we don't have the genesis state
if (!headBlock) {
return self.stateManager.generateCanonicalGenesis(cb);
}
else {
cb(err);
}
});
}
else {
parentState = headBlock.header.stateRoot;
cb();
}
}
// run block, update head if valid
function runBlock(cb) {
self
.runBlock({
block: block,
root: parentState,
})
.then(function () {
// set as new head block
headBlock = block;
cb();
})
.catch(function (err) {
// remove invalid block
blockchain.delBlock(block.header.hash(), function () {
cb(err);
});
});
}
}
});
}
exports.default = runBlockchain;
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