switch to flume

Cargo.lock

@@ -1524,6 +1524,19 @@ dependencies = [
  "yansi",
 ]
 
+[[package]]
+name = "flume"
+version = "0.10.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b279436a715a9de95dcd26b151db590a71961cc06e54918b24fe0dd5b7d3fc4"
+dependencies = [
+ "futures-core",
+ "futures-sink",
+ "nanorand",
+ "pin-project 1.0.10",
+ "spin 0.9.2",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -2269,6 +2282,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "nanorand"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "729eb334247daa1803e0a094d0a5c55711b85571179f5ec6e53eccfdf7008958"
+dependencies = [
+ "getrandom 0.2.5",
+]
+
 [[package]]
 name = "nb-connect"
 version = "1.2.0"
@@ -3212,7 +3234,7 @@ dependencies = [
  "cc",
  "libc",
  "once_cell",
- "spin",
+ "spin 0.5.2",
  "untrusted",
  "web-sys",
  "winapi",
@@ -3753,6 +3775,15 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
+[[package]]
+name = "spin"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "511254be0c5bcf062b019a6c89c01a664aa359ded62f78aa72c6fc137c0590e5"
+dependencies = [
+ "lock_api 0.4.6",
+]
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.0"
@@ -4145,7 +4176,6 @@ version = "0.1.0"
 dependencies = [
  "android_logger",
  "anyhow",
- "async-channel",
  "async-lock",
  "async-std",
  "async-tls",
@@ -4166,6 +4196,7 @@ dependencies = [
  "digest 0.9.0",
  "directories",
  "ed25519-dalek",
+ "flume",
  "futures-util",
  "generic-array 0.14.5",
  "getrandom 0.2.5",