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chain: wait for bitcoind rpc to warm up #677

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chain: wait for bitcoind rpc to warm up #677

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27 changes: 24 additions & 3 deletions chain/bitcoind_conn.go
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Original file line number Diff line number Diff line change
Expand Up @@ -147,9 +147,30 @@ func NewBitcoindConn(cfg *BitcoindConfig) (*BitcoindConn, error) {
}

// Verify that the node is running on the expected network.
net, err := getCurrentNet(client)
if err != nil {
return nil, err
var net wire.BitcoinNet

btcInWarmup := false
for {
net, err = getCurrentNet(client)
if err == nil {
// No error means bitcoind is responsive and we can proceed.
break
}
if rpcErr, ok := err.(*btcjson.RPCError); ok &&
rpcErr.Code == btcjson.ErrRPCInWarmup {
// Error code -28 indicates the bitcoind rpc is warming up.
// We will wait and recheck periodically until rpc is ready.
if !btcInWarmup {
btcInWarmup = true
log.Info("Waiting for bitcoind RPC to finish warming up...")
}
time.Sleep(time.Second * 1)
} else {
return nil, err
}
}
if btcInWarmup {
log.Info("Bitcoind finished warming up and RPC is ready")
}
if net != cfg.ChainParams.Net {
return nil, fmt.Errorf("expected network %v, got %v",
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